* [misc]progress:  [Phase 1 of 3] Setting up.
* * * [misc]progress:  [1/2] Preparing points
* * * [misc]progress:  [2/2] Setting up program.
* [misc]progress:  [Phase 2 of 3] Improving.
* [enter]simplify:  Simplifying (- 180 (/ (* (acos v2_y) 180) PI))
* * [misc]simplify:  iters left: 6 (7 enodes)
* * [misc]simplify:  iters left: 5 (12 enodes)
* * [misc]simplify:  iters left: 4 (19 enodes)
* * [misc]simplify:  iters left: 3 (32 enodes)
* * [misc]simplify:  iters left: 2 (44 enodes)
* * [misc]simplify:  iters left: 1 (54 enodes)
* [exit]simplify:  Simplified to (- 180 (* (/ 180 PI) (acos v2_y)))
* * [misc]progress:  iteration 1 / 4
* * * [misc]progress:  picking best candidate
* * * * [misc]pick:  Picked  #<alt-event (λ (v2_y) (- 180 (/ (* (acos v2_y) 180) PI)))>
* * * [misc]progress:  localizing error
* * * [misc]progress:  generating rewritten candidates
* * * * [misc]progress:  [ 1 / 3 ] rewriting at (2 2 1 1)
* * * * [misc]progress:  [ 2 / 3 ] rewriting at (2 2)
* * * * [misc]progress:  [ 3 / 3 ] rewriting at (2 2 1)
* * * [misc]progress:  generating series expansions
* * * * [misc]progress:  [ 1 / 3 ] generating series at (2 2 1 1)
* [misc]approximate:  Taking taylor expansion of (acos v2_y) in (v2_y) around 0
* [misc]taylor:  Taking taylor expansion of (acos v2_y) in v2_y
* [misc]backup-simplify:  Simplify (acos v2_y) into (acos v2_y)
* [misc]taylor:  Taking taylor expansion of (acos v2_y) in v2_y
* [misc]backup-simplify:  Simplify (acos v2_y) into (acos v2_y)
* [misc]backup-simplify:  Simplify (acos v2_y) into (acos v2_y)
* [misc]backup-simplify:  Simplify 0 into 0
* [misc]backup-simplify:  Simplify 0 into 0
* [misc]backup-simplify:  Simplify 0 into 0
* [misc]backup-simplify:  Simplify 0 into 0
* [misc]backup-simplify:  Simplify 0 into 0
* [misc]backup-simplify:  Simplify 0 into 0
* [misc]backup-simplify:  Simplify (acos v2_y) into (acos v2_y)
* [misc]approximate:  Taking taylor expansion of (acos (/ 1 v2_y)) in (v2_y) around 0
* [misc]taylor:  Taking taylor expansion of (acos (/ 1 v2_y)) in v2_y
* [misc]backup-simplify:  Simplify (acos (/ 1 v2_y)) into (acos (/ 1 v2_y))
* [misc]taylor:  Taking taylor expansion of (acos (/ 1 v2_y)) in v2_y
* [misc]backup-simplify:  Simplify (acos (/ 1 v2_y)) into (acos (/ 1 v2_y))
* [misc]backup-simplify:  Simplify (acos (/ 1 v2_y)) into (acos (/ 1 v2_y))
* [misc]backup-simplify:  Simplify 0 into 0
* [misc]backup-simplify:  Simplify 0 into 0
* [misc]backup-simplify:  Simplify 0 into 0
* [misc]backup-simplify:  Simplify 0 into 0
* [misc]backup-simplify:  Simplify 0 into 0
* [misc]backup-simplify:  Simplify 0 into 0
* [misc]backup-simplify:  Simplify (acos (/ 1 (/ 1 v2_y))) into (acos v2_y)
* [misc]approximate:  Taking taylor expansion of (acos (/ 1 (- v2_y))) in (v2_y) around 0
* [misc]taylor:  Taking taylor expansion of (acos (/ 1 (- v2_y))) in v2_y
* [misc]backup-simplify:  Simplify (acos (/ 1 (- v2_y))) into (acos (/ -1 v2_y))
* [misc]taylor:  Taking taylor expansion of (acos (/ 1 (- v2_y))) in v2_y
* [misc]backup-simplify:  Simplify (acos (/ 1 (- v2_y))) into (acos (/ -1 v2_y))
* [misc]backup-simplify:  Simplify (acos (/ -1 v2_y)) into (acos (/ -1 v2_y))
* [misc]backup-simplify:  Simplify 0 into 0
* [misc]backup-simplify:  Simplify 0 into 0
* [misc]backup-simplify:  Simplify 0 into 0
* [misc]backup-simplify:  Simplify 0 into 0
* [misc]backup-simplify:  Simplify 0 into 0
* [misc]backup-simplify:  Simplify 0 into 0
* [misc]backup-simplify:  Simplify (acos (/ -1 (/ 1 (- v2_y)))) into (acos v2_y)
* * * * [misc]progress:  [ 2 / 3 ] generating series at (2 2)
* [misc]approximate:  Taking taylor expansion of (/ (* (acos v2_y) 180) PI) in (v2_y) around 0
* [misc]taylor:  Taking taylor expansion of (/ (* (acos v2_y) 180) PI) in v2_y
* [misc]taylor:  Taking taylor expansion of (* (acos v2_y) 180) in v2_y
* [misc]taylor:  Taking taylor expansion of (acos v2_y) in v2_y
* [misc]backup-simplify:  Simplify (acos v2_y) into (acos v2_y)
* [misc]taylor:  Taking taylor expansion of 180 in v2_y
* [misc]backup-simplify:  Simplify 180 into 180
* [misc]taylor:  Taking taylor expansion of PI in v2_y
* [misc]backup-simplify:  Simplify PI into PI
* [misc]backup-simplify:  Simplify (* (acos v2_y) 180) into (* 180 (acos v2_y))
* [misc]backup-simplify:  Simplify (/ (* 180 (acos v2_y)) PI) into (* 180 (/ (acos v2_y) PI))
* [misc]taylor:  Taking taylor expansion of (/ (* (acos v2_y) 180) PI) in v2_y
* [misc]taylor:  Taking taylor expansion of (* (acos v2_y) 180) in v2_y
* [misc]taylor:  Taking taylor expansion of (acos v2_y) in v2_y
* [misc]backup-simplify:  Simplify (acos v2_y) into (acos v2_y)
* [misc]taylor:  Taking taylor expansion of 180 in v2_y
* [misc]backup-simplify:  Simplify 180 into 180
* [misc]taylor:  Taking taylor expansion of PI in v2_y
* [misc]backup-simplify:  Simplify PI into PI
* [misc]backup-simplify:  Simplify (* (acos v2_y) 180) into (* 180 (acos v2_y))
* [misc]backup-simplify:  Simplify (/ (* 180 (acos v2_y)) PI) into (* 180 (/ (acos v2_y) PI))
* [misc]backup-simplify:  Simplify (* 180 (/ (acos v2_y) PI)) into (* 180 (/ (acos v2_y) PI))
* [misc]backup-simplify:  Simplify (+ (* (acos v2_y) 0) (* 0 180)) into 0
* [misc]backup-simplify:  Simplify (- (/ 0 PI) (+ (* (* 180 (/ (acos v2_y) PI)) (/ 0 PI)))) into 0
* [misc]backup-simplify:  Simplify 0 into 0
* [misc]backup-simplify:  Simplify (+ (* (acos v2_y) 0) (+ (* 0 0) (* 0 180))) into 0
* [misc]backup-simplify:  Simplify (- (/ 0 PI) (+ (* (* 180 (/ (acos v2_y) PI)) (/ 0 PI)) (* 0 (/ 0 PI)))) into 0
* [misc]backup-simplify:  Simplify 0 into 0
* [misc]backup-simplify:  Simplify (+ (* (acos v2_y) 0) (+ (* 0 0) (+ (* 0 0) (* 0 180)))) into 0
* [misc]backup-simplify:  Simplify (- (/ 0 PI) (+ (* (* 180 (/ (acos v2_y) PI)) (/ 0 PI)) (* 0 (/ 0 PI)) (* 0 (/ 0 PI)))) into 0
* [misc]backup-simplify:  Simplify 0 into 0
* [misc]backup-simplify:  Simplify (+ (* (acos v2_y) 0) (+ (* 0 0) (+ (* 0 0) (+ (* 0 0) (* 0 180))))) into 0
* [misc]backup-simplify:  Simplify (- (/ 0 PI) (+ (* (* 180 (/ (acos v2_y) PI)) (/ 0 PI)) (* 0 (/ 0 PI)) (* 0 (/ 0 PI)) (* 0 (/ 0 PI)))) into 0
* [misc]backup-simplify:  Simplify 0 into 0
* [misc]backup-simplify:  Simplify (+ (* (acos v2_y) 0) (+ (* 0 0) (+ (* 0 0) (+ (* 0 0) (+ (* 0 0) (* 0 180)))))) into 0
* [misc]backup-simplify:  Simplify (- (/ 0 PI) (+ (* (* 180 (/ (acos v2_y) PI)) (/ 0 PI)) (* 0 (/ 0 PI)) (* 0 (/ 0 PI)) (* 0 (/ 0 PI)) (* 0 (/ 0 PI)))) into 0
* [misc]backup-simplify:  Simplify 0 into 0
* [misc]backup-simplify:  Simplify (+ (* (acos v2_y) 0) (+ (* 0 0) (+ (* 0 0) (+ (* 0 0) (+ (* 0 0) (+ (* 0 0) (* 0 180))))))) into 0
* [misc]backup-simplify:  Simplify (- (/ 0 PI) (+ (* (* 180 (/ (acos v2_y) PI)) (/ 0 PI)) (* 0 (/ 0 PI)) (* 0 (/ 0 PI)) (* 0 (/ 0 PI)) (* 0 (/ 0 PI)) (* 0 (/ 0 PI)))) into 0
* [misc]backup-simplify:  Simplify 0 into 0
* [misc]backup-simplify:  Simplify (* 180 (/ (acos v2_y) PI)) into (* 180 (/ (acos v2_y) PI))
* [misc]approximate:  Taking taylor expansion of (/ (* (acos (/ 1 v2_y)) 180) PI) in (v2_y) around 0
* [misc]taylor:  Taking taylor expansion of (/ (* (acos (/ 1 v2_y)) 180) PI) in v2_y
* [misc]taylor:  Taking taylor expansion of (* (acos (/ 1 v2_y)) 180) in v2_y
* [misc]taylor:  Taking taylor expansion of (acos (/ 1 v2_y)) in v2_y
* [misc]backup-simplify:  Simplify (acos (/ 1 v2_y)) into (acos (/ 1 v2_y))
* [misc]taylor:  Taking taylor expansion of 180 in v2_y
* [misc]backup-simplify:  Simplify 180 into 180
* [misc]taylor:  Taking taylor expansion of PI in v2_y
* [misc]backup-simplify:  Simplify PI into PI
* [misc]backup-simplify:  Simplify (* (acos (/ 1 v2_y)) 180) into (* 180 (acos (/ 1 v2_y)))
* [misc]backup-simplify:  Simplify (/ (* 180 (acos (/ 1 v2_y))) PI) into (* 180 (/ (acos (/ 1 v2_y)) PI))
* [misc]taylor:  Taking taylor expansion of (/ (* (acos (/ 1 v2_y)) 180) PI) in v2_y
* [misc]taylor:  Taking taylor expansion of (* (acos (/ 1 v2_y)) 180) in v2_y
* [misc]taylor:  Taking taylor expansion of (acos (/ 1 v2_y)) in v2_y
* [misc]backup-simplify:  Simplify (acos (/ 1 v2_y)) into (acos (/ 1 v2_y))
* [misc]taylor:  Taking taylor expansion of 180 in v2_y
* [misc]backup-simplify:  Simplify 180 into 180
* [misc]taylor:  Taking taylor expansion of PI in v2_y
* [misc]backup-simplify:  Simplify PI into PI
* [misc]backup-simplify:  Simplify (* (acos (/ 1 v2_y)) 180) into (* 180 (acos (/ 1 v2_y)))
* [misc]backup-simplify:  Simplify (/ (* 180 (acos (/ 1 v2_y))) PI) into (* 180 (/ (acos (/ 1 v2_y)) PI))
* [misc]backup-simplify:  Simplify (* 180 (/ (acos (/ 1 v2_y)) PI)) into (* 180 (/ (acos (/ 1 v2_y)) PI))
* [misc]backup-simplify:  Simplify (+ (* (acos (/ 1 v2_y)) 0) (* 0 180)) into 0
* [misc]backup-simplify:  Simplify (- (/ 0 PI) (+ (* (* 180 (/ (acos (/ 1 v2_y)) PI)) (/ 0 PI)))) into 0
* [misc]backup-simplify:  Simplify 0 into 0
* [misc]backup-simplify:  Simplify (+ (* (acos (/ 1 v2_y)) 0) (+ (* 0 0) (* 0 180))) into 0
* [misc]backup-simplify:  Simplify (- (/ 0 PI) (+ (* (* 180 (/ (acos (/ 1 v2_y)) PI)) (/ 0 PI)) (* 0 (/ 0 PI)))) into 0
* [misc]backup-simplify:  Simplify 0 into 0
* [misc]backup-simplify:  Simplify (+ (* (acos (/ 1 v2_y)) 0) (+ (* 0 0) (+ (* 0 0) (* 0 180)))) into 0
* [misc]backup-simplify:  Simplify (- (/ 0 PI) (+ (* (* 180 (/ (acos (/ 1 v2_y)) PI)) (/ 0 PI)) (* 0 (/ 0 PI)) (* 0 (/ 0 PI)))) into 0
* [misc]backup-simplify:  Simplify 0 into 0
* [misc]backup-simplify:  Simplify (+ (* (acos (/ 1 v2_y)) 0) (+ (* 0 0) (+ (* 0 0) (+ (* 0 0) (* 0 180))))) into 0
* [misc]backup-simplify:  Simplify (- (/ 0 PI) (+ (* (* 180 (/ (acos (/ 1 v2_y)) PI)) (/ 0 PI)) (* 0 (/ 0 PI)) (* 0 (/ 0 PI)) (* 0 (/ 0 PI)))) into 0
* [misc]backup-simplify:  Simplify 0 into 0
* [misc]backup-simplify:  Simplify (+ (* (acos (/ 1 v2_y)) 0) (+ (* 0 0) (+ (* 0 0) (+ (* 0 0) (+ (* 0 0) (* 0 180)))))) into 0
* [misc]backup-simplify:  Simplify (- (/ 0 PI) (+ (* (* 180 (/ (acos (/ 1 v2_y)) PI)) (/ 0 PI)) (* 0 (/ 0 PI)) (* 0 (/ 0 PI)) (* 0 (/ 0 PI)) (* 0 (/ 0 PI)))) into 0
* [misc]backup-simplify:  Simplify 0 into 0
* [misc]backup-simplify:  Simplify (+ (* (acos (/ 1 v2_y)) 0) (+ (* 0 0) (+ (* 0 0) (+ (* 0 0) (+ (* 0 0) (+ (* 0 0) (* 0 180))))))) into 0
* [misc]backup-simplify:  Simplify (- (/ 0 PI) (+ (* (* 180 (/ (acos (/ 1 v2_y)) PI)) (/ 0 PI)) (* 0 (/ 0 PI)) (* 0 (/ 0 PI)) (* 0 (/ 0 PI)) (* 0 (/ 0 PI)) (* 0 (/ 0 PI)))) into 0
* [misc]backup-simplify:  Simplify 0 into 0
* [misc]backup-simplify:  Simplify (* 180 (/ (acos (/ 1 (/ 1 v2_y))) PI)) into (* 180 (/ (acos v2_y) PI))
* [misc]approximate:  Taking taylor expansion of (/ (* (acos (/ 1 (- v2_y))) 180) PI) in (v2_y) around 0
* [misc]taylor:  Taking taylor expansion of (/ (* (acos (/ 1 (- v2_y))) 180) PI) in v2_y
* [misc]taylor:  Taking taylor expansion of (* (acos (/ 1 (- v2_y))) 180) in v2_y
* [misc]taylor:  Taking taylor expansion of (acos (/ 1 (- v2_y))) in v2_y
* [misc]backup-simplify:  Simplify (acos (/ 1 (- v2_y))) into (acos (/ -1 v2_y))
* [misc]taylor:  Taking taylor expansion of 180 in v2_y
* [misc]backup-simplify:  Simplify 180 into 180
* [misc]taylor:  Taking taylor expansion of PI in v2_y
* [misc]backup-simplify:  Simplify PI into PI
* [misc]backup-simplify:  Simplify (* (acos (/ -1 v2_y)) 180) into (* 180 (acos (/ -1 v2_y)))
* [misc]backup-simplify:  Simplify (/ (* 180 (acos (/ -1 v2_y))) PI) into (* 180 (/ (acos (/ -1 v2_y)) PI))
* [misc]taylor:  Taking taylor expansion of (/ (* (acos (/ 1 (- v2_y))) 180) PI) in v2_y
* [misc]taylor:  Taking taylor expansion of (* (acos (/ 1 (- v2_y))) 180) in v2_y
* [misc]taylor:  Taking taylor expansion of (acos (/ 1 (- v2_y))) in v2_y
* [misc]backup-simplify:  Simplify (acos (/ 1 (- v2_y))) into (acos (/ -1 v2_y))
* [misc]taylor:  Taking taylor expansion of 180 in v2_y
* [misc]backup-simplify:  Simplify 180 into 180
* [misc]taylor:  Taking taylor expansion of PI in v2_y
* [misc]backup-simplify:  Simplify PI into PI
* [misc]backup-simplify:  Simplify (* (acos (/ -1 v2_y)) 180) into (* 180 (acos (/ -1 v2_y)))
* [misc]backup-simplify:  Simplify (/ (* 180 (acos (/ -1 v2_y))) PI) into (* 180 (/ (acos (/ -1 v2_y)) PI))
* [misc]backup-simplify:  Simplify (* 180 (/ (acos (/ -1 v2_y)) PI)) into (* 180 (/ (acos (/ -1 v2_y)) PI))
* [misc]backup-simplify:  Simplify (+ (* (acos (/ -1 v2_y)) 0) (* 0 180)) into 0
* [misc]backup-simplify:  Simplify (- (/ 0 PI) (+ (* (* 180 (/ (acos (/ -1 v2_y)) PI)) (/ 0 PI)))) into 0
* [misc]backup-simplify:  Simplify 0 into 0
* [misc]backup-simplify:  Simplify (+ (* (acos (/ -1 v2_y)) 0) (+ (* 0 0) (* 0 180))) into 0
* [misc]backup-simplify:  Simplify (- (/ 0 PI) (+ (* (* 180 (/ (acos (/ -1 v2_y)) PI)) (/ 0 PI)) (* 0 (/ 0 PI)))) into 0
* [misc]backup-simplify:  Simplify 0 into 0
* [misc]backup-simplify:  Simplify (+ (* (acos (/ -1 v2_y)) 0) (+ (* 0 0) (+ (* 0 0) (* 0 180)))) into 0
* [misc]backup-simplify:  Simplify (- (/ 0 PI) (+ (* (* 180 (/ (acos (/ -1 v2_y)) PI)) (/ 0 PI)) (* 0 (/ 0 PI)) (* 0 (/ 0 PI)))) into 0
* [misc]backup-simplify:  Simplify 0 into 0
* [misc]backup-simplify:  Simplify (+ (* (acos (/ -1 v2_y)) 0) (+ (* 0 0) (+ (* 0 0) (+ (* 0 0) (* 0 180))))) into 0
* [misc]backup-simplify:  Simplify (- (/ 0 PI) (+ (* (* 180 (/ (acos (/ -1 v2_y)) PI)) (/ 0 PI)) (* 0 (/ 0 PI)) (* 0 (/ 0 PI)) (* 0 (/ 0 PI)))) into 0
* [misc]backup-simplify:  Simplify 0 into 0
* [misc]backup-simplify:  Simplify (+ (* (acos (/ -1 v2_y)) 0) (+ (* 0 0) (+ (* 0 0) (+ (* 0 0) (+ (* 0 0) (* 0 180)))))) into 0
* [misc]backup-simplify:  Simplify (- (/ 0 PI) (+ (* (* 180 (/ (acos (/ -1 v2_y)) PI)) (/ 0 PI)) (* 0 (/ 0 PI)) (* 0 (/ 0 PI)) (* 0 (/ 0 PI)) (* 0 (/ 0 PI)))) into 0
* [misc]backup-simplify:  Simplify 0 into 0
* [misc]backup-simplify:  Simplify (+ (* (acos (/ -1 v2_y)) 0) (+ (* 0 0) (+ (* 0 0) (+ (* 0 0) (+ (* 0 0) (+ (* 0 0) (* 0 180))))))) into 0
* [misc]backup-simplify:  Simplify (- (/ 0 PI) (+ (* (* 180 (/ (acos (/ -1 v2_y)) PI)) (/ 0 PI)) (* 0 (/ 0 PI)) (* 0 (/ 0 PI)) (* 0 (/ 0 PI)) (* 0 (/ 0 PI)) (* 0 (/ 0 PI)))) into 0
* [misc]backup-simplify:  Simplify 0 into 0
* [misc]backup-simplify:  Simplify (* 180 (/ (acos (/ -1 (/ 1 (- v2_y)))) PI)) into (* 180 (/ (acos v2_y) PI))
* * * * [misc]progress:  [ 3 / 3 ] generating series at (2 2 1)
* [misc]approximate:  Taking taylor expansion of (* (acos v2_y) 180) in (v2_y) around 0
* [misc]taylor:  Taking taylor expansion of (* (acos v2_y) 180) in v2_y
* [misc]taylor:  Taking taylor expansion of (acos v2_y) in v2_y
* [misc]backup-simplify:  Simplify (acos v2_y) into (acos v2_y)
* [misc]taylor:  Taking taylor expansion of 180 in v2_y
* [misc]backup-simplify:  Simplify 180 into 180
* [misc]taylor:  Taking taylor expansion of (* (acos v2_y) 180) in v2_y
* [misc]taylor:  Taking taylor expansion of (acos v2_y) in v2_y
* [misc]backup-simplify:  Simplify (acos v2_y) into (acos v2_y)
* [misc]taylor:  Taking taylor expansion of 180 in v2_y
* [misc]backup-simplify:  Simplify 180 into 180
* [misc]backup-simplify:  Simplify (* (acos v2_y) 180) into (* 180 (acos v2_y))
* [misc]backup-simplify:  Simplify (* 180 (acos v2_y)) into (* 180 (acos v2_y))
* [misc]backup-simplify:  Simplify (+ (* (acos v2_y) 0) (* 0 180)) into 0
* [misc]backup-simplify:  Simplify 0 into 0
* [misc]backup-simplify:  Simplify (+ (* (acos v2_y) 0) (+ (* 0 0) (* 0 180))) into 0
* [misc]backup-simplify:  Simplify 0 into 0
* [misc]backup-simplify:  Simplify (+ (* (acos v2_y) 0) (+ (* 0 0) (+ (* 0 0) (* 0 180)))) into 0
* [misc]backup-simplify:  Simplify 0 into 0
* [misc]backup-simplify:  Simplify (+ (* (acos v2_y) 0) (+ (* 0 0) (+ (* 0 0) (+ (* 0 0) (* 0 180))))) into 0
* [misc]backup-simplify:  Simplify 0 into 0
* [misc]backup-simplify:  Simplify (+ (* (acos v2_y) 0) (+ (* 0 0) (+ (* 0 0) (+ (* 0 0) (+ (* 0 0) (* 0 180)))))) into 0
* [misc]backup-simplify:  Simplify 0 into 0
* [misc]backup-simplify:  Simplify (+ (* (acos v2_y) 0) (+ (* 0 0) (+ (* 0 0) (+ (* 0 0) (+ (* 0 0) (+ (* 0 0) (* 0 180))))))) into 0
* [misc]backup-simplify:  Simplify 0 into 0
* [misc]backup-simplify:  Simplify (* 180 (acos v2_y)) into (* 180 (acos v2_y))
* [misc]approximate:  Taking taylor expansion of (* (acos (/ 1 v2_y)) 180) in (v2_y) around 0
* [misc]taylor:  Taking taylor expansion of (* (acos (/ 1 v2_y)) 180) in v2_y
* [misc]taylor:  Taking taylor expansion of (acos (/ 1 v2_y)) in v2_y
* [misc]backup-simplify:  Simplify (acos (/ 1 v2_y)) into (acos (/ 1 v2_y))
* [misc]taylor:  Taking taylor expansion of 180 in v2_y
* [misc]backup-simplify:  Simplify 180 into 180
* [misc]taylor:  Taking taylor expansion of (* (acos (/ 1 v2_y)) 180) in v2_y
* [misc]taylor:  Taking taylor expansion of (acos (/ 1 v2_y)) in v2_y
* [misc]backup-simplify:  Simplify (acos (/ 1 v2_y)) into (acos (/ 1 v2_y))
* [misc]taylor:  Taking taylor expansion of 180 in v2_y
* [misc]backup-simplify:  Simplify 180 into 180
* [misc]backup-simplify:  Simplify (* (acos (/ 1 v2_y)) 180) into (* 180 (acos (/ 1 v2_y)))
* [misc]backup-simplify:  Simplify (* 180 (acos (/ 1 v2_y))) into (* 180 (acos (/ 1 v2_y)))
* [misc]backup-simplify:  Simplify (+ (* (acos (/ 1 v2_y)) 0) (* 0 180)) into 0
* [misc]backup-simplify:  Simplify 0 into 0
* [misc]backup-simplify:  Simplify (+ (* (acos (/ 1 v2_y)) 0) (+ (* 0 0) (* 0 180))) into 0
* [misc]backup-simplify:  Simplify 0 into 0
* [misc]backup-simplify:  Simplify (+ (* (acos (/ 1 v2_y)) 0) (+ (* 0 0) (+ (* 0 0) (* 0 180)))) into 0
* [misc]backup-simplify:  Simplify 0 into 0
* [misc]backup-simplify:  Simplify (+ (* (acos (/ 1 v2_y)) 0) (+ (* 0 0) (+ (* 0 0) (+ (* 0 0) (* 0 180))))) into 0
* [misc]backup-simplify:  Simplify 0 into 0
* [misc]backup-simplify:  Simplify (+ (* (acos (/ 1 v2_y)) 0) (+ (* 0 0) (+ (* 0 0) (+ (* 0 0) (+ (* 0 0) (* 0 180)))))) into 0
* [misc]backup-simplify:  Simplify 0 into 0
* [misc]backup-simplify:  Simplify (+ (* (acos (/ 1 v2_y)) 0) (+ (* 0 0) (+ (* 0 0) (+ (* 0 0) (+ (* 0 0) (+ (* 0 0) (* 0 180))))))) into 0
* [misc]backup-simplify:  Simplify 0 into 0
* [misc]backup-simplify:  Simplify (* 180 (acos (/ 1 (/ 1 v2_y)))) into (* 180 (acos v2_y))
* [misc]approximate:  Taking taylor expansion of (* (acos (/ 1 (- v2_y))) 180) in (v2_y) around 0
* [misc]taylor:  Taking taylor expansion of (* (acos (/ 1 (- v2_y))) 180) in v2_y
* [misc]taylor:  Taking taylor expansion of (acos (/ 1 (- v2_y))) in v2_y
* [misc]backup-simplify:  Simplify (acos (/ 1 (- v2_y))) into (acos (/ -1 v2_y))
* [misc]taylor:  Taking taylor expansion of 180 in v2_y
* [misc]backup-simplify:  Simplify 180 into 180
* [misc]taylor:  Taking taylor expansion of (* (acos (/ 1 (- v2_y))) 180) in v2_y
* [misc]taylor:  Taking taylor expansion of (acos (/ 1 (- v2_y))) in v2_y
* [misc]backup-simplify:  Simplify (acos (/ 1 (- v2_y))) into (acos (/ -1 v2_y))
* [misc]taylor:  Taking taylor expansion of 180 in v2_y
* [misc]backup-simplify:  Simplify 180 into 180
* [misc]backup-simplify:  Simplify (* (acos (/ -1 v2_y)) 180) into (* 180 (acos (/ -1 v2_y)))
* [misc]backup-simplify:  Simplify (* 180 (acos (/ -1 v2_y))) into (* 180 (acos (/ -1 v2_y)))
* [misc]backup-simplify:  Simplify (+ (* (acos (/ -1 v2_y)) 0) (* 0 180)) into 0
* [misc]backup-simplify:  Simplify 0 into 0
* [misc]backup-simplify:  Simplify (+ (* (acos (/ -1 v2_y)) 0) (+ (* 0 0) (* 0 180))) into 0
* [misc]backup-simplify:  Simplify 0 into 0
* [misc]backup-simplify:  Simplify (+ (* (acos (/ -1 v2_y)) 0) (+ (* 0 0) (+ (* 0 0) (* 0 180)))) into 0
* [misc]backup-simplify:  Simplify 0 into 0
* [misc]backup-simplify:  Simplify (+ (* (acos (/ -1 v2_y)) 0) (+ (* 0 0) (+ (* 0 0) (+ (* 0 0) (* 0 180))))) into 0
* [misc]backup-simplify:  Simplify 0 into 0
* [misc]backup-simplify:  Simplify (+ (* (acos (/ -1 v2_y)) 0) (+ (* 0 0) (+ (* 0 0) (+ (* 0 0) (+ (* 0 0) (* 0 180)))))) into 0
* [misc]backup-simplify:  Simplify 0 into 0
* [misc]backup-simplify:  Simplify (+ (* (acos (/ -1 v2_y)) 0) (+ (* 0 0) (+ (* 0 0) (+ (* 0 0) (+ (* 0 0) (+ (* 0 0) (* 0 180))))))) into 0
* [misc]backup-simplify:  Simplify 0 into 0
* [misc]backup-simplify:  Simplify (* 180 (acos (/ -1 (/ 1 (- v2_y))))) into (* 180 (acos v2_y))
* * * [misc]progress:  simplifying candidates
* * * * [misc]progress:  [ 1 / 39 ] simplifiying candidate #<alt-delta (λ (v2_y) (- 180 (/ (* (- (/ PI 2) (asin v2_y)) 180) PI)))>
* [enter]simplify:  Simplifying (/ PI 2)
* * [misc]simplify:  iters left: 2 (3 enodes)
* [exit]simplify:  Simplified to (/ PI 2)
* [exit]simplify:  Simplified to (/ PI 2)
* [enter]simplify:  Simplifying (asin v2_y)
* * [misc]simplify:  iters left: 1 (2 enodes)
* [exit]simplify:  Simplified to (asin v2_y)
* [exit]simplify:  Simplified to (asin v2_y)
* * * * [misc]progress:  [ 2 / 39 ] simplifiying candidate #<alt-delta (λ (v2_y) (- 180 (/ (* (pow (acos v2_y) 1) 180) PI)))>
* * * * [misc]progress:  [ 3 / 39 ] simplifiying candidate #<alt-delta (λ (v2_y) (- 180 (/ (* (exp (log (acos v2_y))) 180) PI)))>
* [enter]simplify:  Simplifying (log (acos v2_y))
* * [misc]simplify:  iters left: 2 (3 enodes)
* [exit]simplify:  Simplified to (log (acos v2_y))
* [exit]simplify:  Simplified to (log (acos v2_y))
* * * * [misc]progress:  [ 4 / 39 ] simplifiying candidate #<alt-delta (λ (v2_y) (- 180 (/ (* (log (exp (acos v2_y))) 180) PI)))>
* [enter]simplify:  Simplifying (exp (acos v2_y))
* * [misc]simplify:  iters left: 2 (3 enodes)
* [exit]simplify:  Simplified to (exp (acos v2_y))
* [exit]simplify:  Simplified to (exp (acos v2_y))
* * * * [misc]progress:  [ 5 / 39 ] simplifiying candidate #<alt-delta (λ (v2_y) (- 180 (/ (* (* (* (cbrt (acos v2_y)) (cbrt (acos v2_y))) (cbrt (acos v2_y))) 180) PI)))>
* [enter]simplify:  Simplifying (* (cbrt (acos v2_y)) (cbrt (acos v2_y)))
* * [misc]simplify:  iters left: 4 (4 enodes)
* [exit]simplify:  Simplified to (* (cbrt (acos v2_y)) (cbrt (acos v2_y)))
* [exit]simplify:  Simplified to (* (cbrt (acos v2_y)) (cbrt (acos v2_y)))
* [enter]simplify:  Simplifying (cbrt (acos v2_y))
* * [misc]simplify:  iters left: 2 (3 enodes)
* [exit]simplify:  Simplified to (cbrt (acos v2_y))
* [exit]simplify:  Simplified to (cbrt (acos v2_y))
* * * * [misc]progress:  [ 6 / 39 ] simplifiying candidate #<alt-delta (λ (v2_y) (- 180 (/ (* (cbrt (* (* (acos v2_y) (acos v2_y)) (acos v2_y))) 180) PI)))>
* [enter]simplify:  Simplifying (* (* (acos v2_y) (acos v2_y)) (acos v2_y))
* * [misc]simplify:  iters left: 5 (4 enodes)
* * [misc]simplify:  iters left: 4 (5 enodes)
* * [misc]simplify:  iters left: 3 (7 enodes)
* [exit]simplify:  Simplified to (pow (acos v2_y) 3)
* [exit]simplify:  Simplified to (pow (acos v2_y) 3)
* * * * [misc]progress:  [ 7 / 39 ] simplifiying candidate #<alt-delta (λ (v2_y) (- 180 (/ (* (* (sqrt (acos v2_y)) (sqrt (acos v2_y))) 180) PI)))>
* [enter]simplify:  Simplifying (sqrt (acos v2_y))
* * [misc]simplify:  iters left: 2 (3 enodes)
* [exit]simplify:  Simplified to (sqrt (acos v2_y))
* [exit]simplify:  Simplified to (sqrt (acos v2_y))
* [enter]simplify:  Simplifying (sqrt (acos v2_y))
* * [misc]simplify:  iters left: 2 (3 enodes)
* [exit]simplify:  Simplified to (sqrt (acos v2_y))
* [exit]simplify:  Simplified to (sqrt (acos v2_y))
* * * * [misc]progress:  [ 8 / 39 ] simplifiying candidate #<alt-delta (λ (v2_y) (- 180 (/ (* (* 1 (acos v2_y)) 180) PI)))>
* * * * [misc]progress:  [ 9 / 39 ] simplifiying candidate #<alt-delta (λ (v2_y) (- 180 (pow (/ (* (acos v2_y) 180) PI) 1)))>
* * * * [misc]progress:  [ 10 / 39 ] simplifiying candidate #<alt-delta (λ (v2_y) (- 180 (exp (log (/ (* (acos v2_y) 180) PI)))))>
* [enter]simplify:  Simplifying (log (/ (* (acos v2_y) 180) PI))
* * [misc]simplify:  iters left: 6 (7 enodes)
* * [misc]simplify:  iters left: 5 (13 enodes)
* * [misc]simplify:  iters left: 4 (21 enodes)
* * [misc]simplify:  iters left: 3 (37 enodes)
* * [misc]simplify:  iters left: 2 (49 enodes)
* * [misc]simplify:  iters left: 1 (56 enodes)
* [exit]simplify:  Simplified to (log (/ (acos v2_y) (/ PI 180)))
* [exit]simplify:  Simplified to (log (/ (acos v2_y) (/ PI 180)))
* * * * [misc]progress:  [ 11 / 39 ] simplifiying candidate #<alt-delta (λ (v2_y) (- 180 (log (exp (/ (* (acos v2_y) 180) PI)))))>
* [enter]simplify:  Simplifying (exp (/ (* (acos v2_y) 180) PI))
* * [misc]simplify:  iters left: 6 (7 enodes)
* * [misc]simplify:  iters left: 5 (10 enodes)
* * [misc]simplify:  iters left: 4 (12 enodes)
* * [misc]simplify:  iters left: 3 (17 enodes)
* * [misc]simplify:  iters left: 2 (19 enodes)
* * [misc]simplify:  iters left: 1 (20 enodes)
* [exit]simplify:  Simplified to (exp (/ (acos v2_y) (/ PI 180)))
* [exit]simplify:  Simplified to (exp (/ (acos v2_y) (/ PI 180)))
* * * * [misc]progress:  [ 12 / 39 ] simplifiying candidate #<alt-delta (λ (v2_y) (- 180 (* (* (cbrt (/ (* (acos v2_y) 180) PI)) (cbrt (/ (* (acos v2_y) 180) PI))) (cbrt (/ (* (acos v2_y) 180) PI)))))>
* [enter]simplify:  Simplifying (* (cbrt (/ (* (acos v2_y) 180) PI)) (cbrt (/ (* (acos v2_y) 180) PI)))
* * [misc]simplify:  iters left: 6 (8 enodes)
* * [misc]simplify:  iters left: 5 (11 enodes)
* * [misc]simplify:  iters left: 4 (13 enodes)
* * [misc]simplify:  iters left: 3 (16 enodes)
* * [misc]simplify:  iters left: 2 (18 enodes)
* * [misc]simplify:  iters left: 1 (19 enodes)
* [exit]simplify:  Simplified to (* (cbrt (* (/ 180 PI) (acos v2_y))) (cbrt (* (/ 180 PI) (acos v2_y))))
* [exit]simplify:  Simplified to (* (cbrt (* (/ 180 PI) (acos v2_y))) (cbrt (* (/ 180 PI) (acos v2_y))))
* [enter]simplify:  Simplifying (cbrt (/ (* (acos v2_y) 180) PI))
* * [misc]simplify:  iters left: 6 (7 enodes)
* * [misc]simplify:  iters left: 5 (10 enodes)
* * [misc]simplify:  iters left: 4 (12 enodes)
* * [misc]simplify:  iters left: 3 (15 enodes)
* * [misc]simplify:  iters left: 2 (17 enodes)
* * [misc]simplify:  iters left: 1 (18 enodes)
* [exit]simplify:  Simplified to (cbrt (/ (acos v2_y) (/ PI 180)))
* [exit]simplify:  Simplified to (cbrt (/ (acos v2_y) (/ PI 180)))
* * * * [misc]progress:  [ 13 / 39 ] simplifiying candidate #<alt-delta (λ (v2_y) (- 180 (cbrt (* (* (/ (* (acos v2_y) 180) PI) (/ (* (acos v2_y) 180) PI)) (/ (* (acos v2_y) 180) PI)))))>
* [enter]simplify:  Simplifying (* (* (/ (* (acos v2_y) 180) PI) (/ (* (acos v2_y) 180) PI)) (/ (* (acos v2_y) 180) PI))
* * [misc]simplify:  iters left: 6 (8 enodes)
* * [misc]simplify:  iters left: 5 (18 enodes)
* * [misc]simplify:  iters left: 4 (59 enodes)
* * [misc]simplify:  iters left: 3 (191 enodes)
* [exit]simplify:  Simplified to (pow (* (/ 180 PI) (acos v2_y)) 3)
* [exit]simplify:  Simplified to (pow (* (/ 180 PI) (acos v2_y)) 3)
* * * * [misc]progress:  [ 14 / 39 ] simplifiying candidate #<alt-delta (λ (v2_y) (- 180 (* (sqrt (/ (* (acos v2_y) 180) PI)) (sqrt (/ (* (acos v2_y) 180) PI)))))>
* [enter]simplify:  Simplifying (sqrt (/ (* (acos v2_y) 180) PI))
* * [misc]simplify:  iters left: 6 (7 enodes)
* * [misc]simplify:  iters left: 5 (10 enodes)
* * [misc]simplify:  iters left: 4 (12 enodes)
* * [misc]simplify:  iters left: 3 (15 enodes)
* * [misc]simplify:  iters left: 2 (17 enodes)
* * [misc]simplify:  iters left: 1 (18 enodes)
* [exit]simplify:  Simplified to (sqrt (/ (acos v2_y) (/ PI 180)))
* [exit]simplify:  Simplified to (sqrt (/ (acos v2_y) (/ PI 180)))
* [enter]simplify:  Simplifying (sqrt (/ (* (acos v2_y) 180) PI))
* * [misc]simplify:  iters left: 6 (7 enodes)
* * [misc]simplify:  iters left: 5 (10 enodes)
* * [misc]simplify:  iters left: 4 (12 enodes)
* * [misc]simplify:  iters left: 3 (15 enodes)
* * [misc]simplify:  iters left: 2 (17 enodes)
* * [misc]simplify:  iters left: 1 (18 enodes)
* [exit]simplify:  Simplified to (sqrt (/ (acos v2_y) (/ PI 180)))
* [exit]simplify:  Simplified to (sqrt (/ (acos v2_y) (/ PI 180)))
* * * * [misc]progress:  [ 15 / 39 ] simplifiying candidate #<alt-delta (λ (v2_y) (- 180 (/ (- (* (acos v2_y) 180)) (- PI))))>
* [enter]simplify:  Simplifying (- (* (acos v2_y) 180))
* * [misc]simplify:  iters left: 5 (5 enodes)
* * [misc]simplify:  iters left: 4 (10 enodes)
* * [misc]simplify:  iters left: 3 (12 enodes)
* [exit]simplify:  Simplified to (* (- 180) (acos v2_y))
* [exit]simplify:  Simplified to (* (- 180) (acos v2_y))
* [enter]simplify:  Simplifying (- PI)
* * [misc]simplify:  iters left: 2 (2 enodes)
* [exit]simplify:  Simplified to (- PI)
* [exit]simplify:  Simplified to (- PI)
* * * * [misc]progress:  [ 16 / 39 ] simplifiying candidate #<alt-delta (λ (v2_y) (- 180 (* 1 (/ (* (acos v2_y) 180) PI))))>
* * * * [misc]progress:  [ 17 / 39 ] simplifiying candidate #<alt-delta (λ (v2_y) (- 180 (* (* (acos v2_y) 180) (/ 1 PI))))>
* [enter]simplify:  Simplifying (/ 1 PI)
* * [misc]simplify:  iters left: 2 (3 enodes)
* * [misc]simplify:  iters left: 1 (5 enodes)
* [exit]simplify:  Simplified to (/ 1 PI)
* [exit]simplify:  Simplified to (/ 1 PI)
* * * * [misc]progress:  [ 18 / 39 ] simplifiying candidate #<alt-delta (λ (v2_y) (- 180 (/ 1 (/ PI (* (acos v2_y) 180)))))>
* [enter]simplify:  Simplifying (/ PI (* (acos v2_y) 180))
* * [misc]simplify:  iters left: 5 (6 enodes)
* * [misc]simplify:  iters left: 4 (9 enodes)
* [exit]simplify:  Simplified to (/ (/ PI (acos v2_y)) 180)
* [exit]simplify:  Simplified to (/ (/ PI (acos v2_y)) 180)
* * * * [misc]progress:  [ 19 / 39 ] simplifiying candidate #<alt-delta (λ (v2_y) (- 180 (/ (acos v2_y) (/ PI 180))))>
* [enter]simplify:  Simplifying (/ PI 180)
* * [misc]simplify:  iters left: 2 (3 enodes)
* [exit]simplify:  Simplified to (/ PI 180)
* [exit]simplify:  Simplified to (/ PI 180)
* * * * [misc]progress:  [ 20 / 39 ] simplifiying candidate #<alt-delta (λ (v2_y) (- 180 (/ (pow (* (acos v2_y) 180) 1) PI)))>
* * * * [misc]progress:  [ 21 / 39 ] simplifiying candidate #<alt-delta (λ (v2_y) (- 180 (/ (exp (log (* (acos v2_y) 180))) PI)))>
* [enter]simplify:  Simplifying (log (* (acos v2_y) 180))
* * [misc]simplify:  iters left: 4 (5 enodes)
* * [misc]simplify:  iters left: 3 (9 enodes)
* * [misc]simplify:  iters left: 2 (10 enodes)
* [exit]simplify:  Simplified to (log (* 180 (acos v2_y)))
* [exit]simplify:  Simplified to (log (* 180 (acos v2_y)))
* * * * [misc]progress:  [ 22 / 39 ] simplifiying candidate #<alt-delta (λ (v2_y) (- 180 (/ (log (exp (* (acos v2_y) 180))) PI)))>
* [enter]simplify:  Simplifying (exp (* (acos v2_y) 180))
* * [misc]simplify:  iters left: 4 (5 enodes)
* * [misc]simplify:  iters left: 3 (8 enodes)
* [exit]simplify:  Simplified to (exp (* 180 (acos v2_y)))
* [exit]simplify:  Simplified to (exp (* 180 (acos v2_y)))
* * * * [misc]progress:  [ 23 / 39 ] simplifiying candidate #<alt-delta (λ (v2_y) (- 180 (/ (* (* (cbrt (* (acos v2_y) 180)) (cbrt (* (acos v2_y) 180))) (cbrt (* (acos v2_y) 180))) PI)))>
* [enter]simplify:  Simplifying (* (cbrt (* (acos v2_y) 180)) (cbrt (* (acos v2_y) 180)))
* * [misc]simplify:  iters left: 6 (6 enodes)
* * [misc]simplify:  iters left: 5 (7 enodes)
* [exit]simplify:  Simplified to (* (cbrt (* 180 (acos v2_y))) (cbrt (* 180 (acos v2_y))))
* [exit]simplify:  Simplified to (* (cbrt (* 180 (acos v2_y))) (cbrt (* 180 (acos v2_y))))
* [enter]simplify:  Simplifying (cbrt (* (acos v2_y) 180))
* * [misc]simplify:  iters left: 4 (5 enodes)
* * [misc]simplify:  iters left: 3 (6 enodes)
* [exit]simplify:  Simplified to (cbrt (* 180 (acos v2_y)))
* [exit]simplify:  Simplified to (cbrt (* 180 (acos v2_y)))
* * * * [misc]progress:  [ 24 / 39 ] simplifiying candidate #<alt-delta (λ (v2_y) (- 180 (/ (cbrt (* (* (* (acos v2_y) 180) (* (acos v2_y) 180)) (* (acos v2_y) 180))) PI)))>
* [enter]simplify:  Simplifying (* (* (* (acos v2_y) 180) (* (acos v2_y) 180)) (* (acos v2_y) 180))
* * [misc]simplify:  iters left: 6 (6 enodes)
* * [misc]simplify:  iters left: 5 (14 enodes)
* * [misc]simplify:  iters left: 4 (30 enodes)
* * [misc]simplify:  iters left: 3 (56 enodes)
* * [misc]simplify:  iters left: 2 (87 enodes)
* * [misc]simplify:  iters left: 1 (90 enodes)
* [exit]simplify:  Simplified to (pow (* 180 (acos v2_y)) 3)
* [exit]simplify:  Simplified to (pow (* 180 (acos v2_y)) 3)
* * * * [misc]progress:  [ 25 / 39 ] simplifiying candidate #<alt-delta (λ (v2_y) (- 180 (/ (* (sqrt (* (acos v2_y) 180)) (sqrt (* (acos v2_y) 180))) PI)))>
* [enter]simplify:  Simplifying (sqrt (* (acos v2_y) 180))
* * [misc]simplify:  iters left: 4 (5 enodes)
* * [misc]simplify:  iters left: 3 (6 enodes)
* [exit]simplify:  Simplified to (sqrt (* 180 (acos v2_y)))
* [exit]simplify:  Simplified to (sqrt (* 180 (acos v2_y)))
* [enter]simplify:  Simplifying (sqrt (* (acos v2_y) 180))
* * [misc]simplify:  iters left: 4 (5 enodes)
* * [misc]simplify:  iters left: 3 (6 enodes)
* [exit]simplify:  Simplified to (sqrt (* 180 (acos v2_y)))
* [exit]simplify:  Simplified to (sqrt (* 180 (acos v2_y)))
* * * * [misc]progress:  [ 26 / 39 ] simplifiying candidate #<alt-delta (λ (v2_y) (- 180 (/ (* 1 (* (acos v2_y) 180)) PI)))>
* * * * [misc]progress:  [ 27 / 39 ] simplifiying candidate #<alt-delta (λ (v2_y) (- 180 (/ (* (* (cbrt (acos v2_y)) (cbrt (acos v2_y))) (* (cbrt (acos v2_y)) 180)) PI)))>
* [enter]simplify:  Simplifying (* (cbrt (acos v2_y)) 180)
* * [misc]simplify:  iters left: 4 (5 enodes)
* * [misc]simplify:  iters left: 3 (6 enodes)
* [exit]simplify:  Simplified to (* (cbrt (acos v2_y)) 180)
* [exit]simplify:  Simplified to (* (cbrt (acos v2_y)) 180)
* * * * [misc]progress:  [ 28 / 39 ] simplifiying candidate #<alt-delta (λ (v2_y) (- 180 (/ (* (sqrt (acos v2_y)) (* (sqrt (acos v2_y)) 180)) PI)))>
* [enter]simplify:  Simplifying (* (sqrt (acos v2_y)) 180)
* * [misc]simplify:  iters left: 4 (5 enodes)
* * [misc]simplify:  iters left: 3 (6 enodes)
* [exit]simplify:  Simplified to (* (sqrt (acos v2_y)) 180)
* [exit]simplify:  Simplified to (* (sqrt (acos v2_y)) 180)
* * * * [misc]progress:  [ 29 / 39 ] simplifiying candidate #<alt-delta (λ (v2_y) (- 180 (/ (* 1 (* (acos v2_y) 180)) PI)))>
* [enter]simplify:  Simplifying (* (acos v2_y) 180)
* * [misc]simplify:  iters left: 3 (4 enodes)
* * [misc]simplify:  iters left: 2 (5 enodes)
* [exit]simplify:  Simplified to (* 180 (acos v2_y))
* [exit]simplify:  Simplified to (* 180 (acos v2_y))
* * * * [misc]progress:  [ 30 / 39 ] simplifiying candidate #<alt-delta (λ (v2_y) (- 180 (/ (* 180 (acos v2_y)) PI)))>
* * * * [misc]progress:  [ 31 / 39 ] simplifiying candidate #<alt-event (λ (v2_y) (- 180 (/ (* (acos v2_y) 180) PI)))>
* [enter]simplify:  Simplifying (- 180 (/ (* (acos v2_y) 180) PI))
* * [misc]simplify:  iters left: 6 (7 enodes)
* * [misc]simplify:  iters left: 5 (12 enodes)
* * [misc]simplify:  iters left: 4 (19 enodes)
* * [misc]simplify:  iters left: 3 (32 enodes)
* * [misc]simplify:  iters left: 2 (44 enodes)
* * [misc]simplify:  iters left: 1 (54 enodes)
* [exit]simplify:  Simplified to (- 180 (* (/ 180 PI) (acos v2_y)))
* * * * [misc]progress:  [ 32 / 39 ] simplifiying candidate #<alt-event (λ (v2_y) (- 180 (/ (* (acos v2_y) 180) PI)))>
* [enter]simplify:  Simplifying (- 180 (/ (* (acos v2_y) 180) PI))
* * [misc]simplify:  iters left: 6 (7 enodes)
* * [misc]simplify:  iters left: 5 (12 enodes)
* * [misc]simplify:  iters left: 4 (19 enodes)
* * [misc]simplify:  iters left: 3 (32 enodes)
* * [misc]simplify:  iters left: 2 (44 enodes)
* * [misc]simplify:  iters left: 1 (54 enodes)
* [exit]simplify:  Simplified to (- 180 (* (/ 180 PI) (acos v2_y)))
* * * * [misc]progress:  [ 33 / 39 ] simplifiying candidate #<alt-event (λ (v2_y) (- 180 (/ (* (acos v2_y) 180) PI)))>
* [enter]simplify:  Simplifying (- 180 (/ (* (acos v2_y) 180) PI))
* * [misc]simplify:  iters left: 6 (7 enodes)
* * [misc]simplify:  iters left: 5 (12 enodes)
* * [misc]simplify:  iters left: 4 (19 enodes)
* * [misc]simplify:  iters left: 3 (32 enodes)
* * [misc]simplify:  iters left: 2 (44 enodes)
* * [misc]simplify:  iters left: 1 (54 enodes)
* [exit]simplify:  Simplified to (- 180 (* (/ 180 PI) (acos v2_y)))
* * * * [misc]progress:  [ 34 / 39 ] simplifiying candidate #<alt-event (λ (v2_y) (- 180 (* 180 (/ (acos v2_y) PI))))>
* [enter]simplify:  Simplifying (- 180 (* 180 (/ (acos v2_y) PI)))
* * [misc]simplify:  iters left: 6 (7 enodes)
* * [misc]simplify:  iters left: 5 (12 enodes)
* * [misc]simplify:  iters left: 4 (25 enodes)
* * [misc]simplify:  iters left: 3 (36 enodes)
* * [misc]simplify:  iters left: 2 (48 enodes)
* * [misc]simplify:  iters left: 1 (61 enodes)
* [exit]simplify:  Simplified to (- 180 (* (/ 180 PI) (acos v2_y)))
* * * * [misc]progress:  [ 35 / 39 ] simplifiying candidate #<alt-event (λ (v2_y) (- 180 (* 180 (/ (acos v2_y) PI))))>
* [enter]simplify:  Simplifying (- 180 (* 180 (/ (acos v2_y) PI)))
* * [misc]simplify:  iters left: 6 (7 enodes)
* * [misc]simplify:  iters left: 5 (12 enodes)
* * [misc]simplify:  iters left: 4 (25 enodes)
* * [misc]simplify:  iters left: 3 (36 enodes)
* * [misc]simplify:  iters left: 2 (48 enodes)
* * [misc]simplify:  iters left: 1 (61 enodes)
* [exit]simplify:  Simplified to (- 180 (* (/ 180 PI) (acos v2_y)))
* * * * [misc]progress:  [ 36 / 39 ] simplifiying candidate #<alt-event (λ (v2_y) (- 180 (* 180 (/ (acos v2_y) PI))))>
* [enter]simplify:  Simplifying (- 180 (* 180 (/ (acos v2_y) PI)))
* * [misc]simplify:  iters left: 6 (7 enodes)
* * [misc]simplify:  iters left: 5 (12 enodes)
* * [misc]simplify:  iters left: 4 (25 enodes)
* * [misc]simplify:  iters left: 3 (36 enodes)
* * [misc]simplify:  iters left: 2 (48 enodes)
* * [misc]simplify:  iters left: 1 (61 enodes)
* [exit]simplify:  Simplified to (- 180 (* (/ 180 PI) (acos v2_y)))
* * * * [misc]progress:  [ 37 / 39 ] simplifiying candidate #<alt-event (λ (v2_y) (- 180 (/ (* 180 (acos v2_y)) PI)))>
* [enter]simplify:  Simplifying (- 180 (/ (* 180 (acos v2_y)) PI))
* * [misc]simplify:  iters left: 6 (7 enodes)
* * [misc]simplify:  iters left: 5 (12 enodes)
* * [misc]simplify:  iters left: 4 (19 enodes)
* * [misc]simplify:  iters left: 3 (32 enodes)
* * [misc]simplify:  iters left: 2 (41 enodes)
* * [misc]simplify:  iters left: 1 (47 enodes)
* [exit]simplify:  Simplified to (- 180 (* (/ 180 PI) (acos v2_y)))
* * * * [misc]progress:  [ 38 / 39 ] simplifiying candidate #<alt-event (λ (v2_y) (- 180 (/ (* 180 (acos v2_y)) PI)))>
* [enter]simplify:  Simplifying (- 180 (/ (* 180 (acos v2_y)) PI))
* * [misc]simplify:  iters left: 6 (7 enodes)
* * [misc]simplify:  iters left: 5 (12 enodes)
* * [misc]simplify:  iters left: 4 (19 enodes)
* * [misc]simplify:  iters left: 3 (32 enodes)
* * [misc]simplify:  iters left: 2 (41 enodes)
* * [misc]simplify:  iters left: 1 (47 enodes)
* [exit]simplify:  Simplified to (- 180 (* (/ 180 PI) (acos v2_y)))
* * * * [misc]progress:  [ 39 / 39 ] simplifiying candidate #<alt-event (λ (v2_y) (- 180 (/ (* 180 (acos v2_y)) PI)))>
* [enter]simplify:  Simplifying (- 180 (/ (* 180 (acos v2_y)) PI))
* * [misc]simplify:  iters left: 6 (7 enodes)
* * [misc]simplify:  iters left: 5 (12 enodes)
* * [misc]simplify:  iters left: 4 (19 enodes)
* * [misc]simplify:  iters left: 3 (32 enodes)
* * [misc]simplify:  iters left: 2 (41 enodes)
* * [misc]simplify:  iters left: 1 (47 enodes)
* [exit]simplify:  Simplified to (- 180 (* (/ 180 PI) (acos v2_y)))
* * * [misc]progress:  adding candidates to table
* * [misc]progress:  iteration 2 / 4
* * * [misc]progress:  picking best candidate
* * * * [misc]pick:  Picked  #<alt-delta (λ (v2_y) (- 180 (* (sqrt (/ (* (acos v2_y) 180) PI)) (sqrt (/ (* (acos v2_y) 180) PI)))))>
* * * [misc]progress:  localizing error
* * * [misc]progress:  generating rewritten candidates
* * * * [misc]progress:  [ 1 / 4 ] rewriting at (2 2)
* * * * [misc]progress:  [ 2 / 4 ] rewriting at (2 2 2 1 1 1)
* * * * [misc]progress:  [ 3 / 4 ] rewriting at (2 2 1 1 1 1)
* * * * [misc]progress:  [ 4 / 4 ] rewriting at (2 2 2 1)
* * * [misc]progress:  generating series expansions
* * * * [misc]progress:  [ 1 / 4 ] generating series at (2 2)
* [misc]approximate:  Taking taylor expansion of (* (sqrt (/ (* (acos v2_y) 180) PI)) (sqrt (/ (* (acos v2_y) 180) PI))) in (v2_y) around 0
* [misc]taylor:  Taking taylor expansion of (* (sqrt (/ (* (acos v2_y) 180) PI)) (sqrt (/ (* (acos v2_y) 180) PI))) in v2_y
* [misc]taylor:  Taking taylor expansion of (sqrt (/ (* (acos v2_y) 180) PI)) in v2_y
* [misc]taylor:  Taking taylor expansion of (/ (* (acos v2_y) 180) PI) in v2_y
* [misc]taylor:  Taking taylor expansion of (* (acos v2_y) 180) in v2_y
* [misc]taylor:  Taking taylor expansion of (acos v2_y) in v2_y
* [misc]backup-simplify:  Simplify (acos v2_y) into (acos v2_y)
* [misc]taylor:  Taking taylor expansion of 180 in v2_y
* [misc]backup-simplify:  Simplify 180 into 180
* [misc]taylor:  Taking taylor expansion of PI in v2_y
* [misc]backup-simplify:  Simplify PI into PI
* [misc]backup-simplify:  Simplify (* (acos v2_y) 180) into (* 180 (acos v2_y))
* [misc]backup-simplify:  Simplify (/ (* 180 (acos v2_y)) PI) into (* 180 (/ (acos v2_y) PI))
* [misc]backup-simplify:  Simplify (sqrt (* 180 (/ (acos v2_y) PI))) into (* (sqrt 180) (sqrt (/ (acos v2_y) PI)))
* [misc]backup-simplify:  Simplify (+ (* (acos v2_y) 0) (* 0 180)) into 0
* [misc]backup-simplify:  Simplify (- (/ 0 PI) (+ (* (* 180 (/ (acos v2_y) PI)) (/ 0 PI)))) into 0
* [misc]backup-simplify:  Simplify (/ 0 (* 2 (sqrt (* 180 (/ (acos v2_y) PI))))) into 0
* [misc]taylor:  Taking taylor expansion of (sqrt (/ (* (acos v2_y) 180) PI)) in v2_y
* [misc]taylor:  Taking taylor expansion of (/ (* (acos v2_y) 180) PI) in v2_y
* [misc]taylor:  Taking taylor expansion of (* (acos v2_y) 180) in v2_y
* [misc]taylor:  Taking taylor expansion of (acos v2_y) in v2_y
* [misc]backup-simplify:  Simplify (acos v2_y) into (acos v2_y)
* [misc]taylor:  Taking taylor expansion of 180 in v2_y
* [misc]backup-simplify:  Simplify 180 into 180
* [misc]taylor:  Taking taylor expansion of PI in v2_y
* [misc]backup-simplify:  Simplify PI into PI
* [misc]backup-simplify:  Simplify (* (acos v2_y) 180) into (* 180 (acos v2_y))
* [misc]backup-simplify:  Simplify (/ (* 180 (acos v2_y)) PI) into (* 180 (/ (acos v2_y) PI))
* [misc]backup-simplify:  Simplify (sqrt (* 180 (/ (acos v2_y) PI))) into (* (sqrt 180) (sqrt (/ (acos v2_y) PI)))
* [misc]backup-simplify:  Simplify (+ (* (acos v2_y) 0) (* 0 180)) into 0
* [misc]backup-simplify:  Simplify (- (/ 0 PI) (+ (* (* 180 (/ (acos v2_y) PI)) (/ 0 PI)))) into 0
* [misc]backup-simplify:  Simplify (/ 0 (* 2 (sqrt (* 180 (/ (acos v2_y) PI))))) into 0
* [misc]taylor:  Taking taylor expansion of (* (sqrt (/ (* (acos v2_y) 180) PI)) (sqrt (/ (* (acos v2_y) 180) PI))) in v2_y
* [misc]taylor:  Taking taylor expansion of (sqrt (/ (* (acos v2_y) 180) PI)) in v2_y
* [misc]taylor:  Taking taylor expansion of (/ (* (acos v2_y) 180) PI) in v2_y
* [misc]taylor:  Taking taylor expansion of (* (acos v2_y) 180) in v2_y
* [misc]taylor:  Taking taylor expansion of (acos v2_y) in v2_y
* [misc]backup-simplify:  Simplify (acos v2_y) into (acos v2_y)
* [misc]taylor:  Taking taylor expansion of 180 in v2_y
* [misc]backup-simplify:  Simplify 180 into 180
* [misc]taylor:  Taking taylor expansion of PI in v2_y
* [misc]backup-simplify:  Simplify PI into PI
* [misc]backup-simplify:  Simplify (* (acos v2_y) 180) into (* 180 (acos v2_y))
* [misc]backup-simplify:  Simplify (/ (* 180 (acos v2_y)) PI) into (* 180 (/ (acos v2_y) PI))
* [misc]backup-simplify:  Simplify (sqrt (* 180 (/ (acos v2_y) PI))) into (* (sqrt 180) (sqrt (/ (acos v2_y) PI)))
* [misc]backup-simplify:  Simplify (+ (* (acos v2_y) 0) (* 0 180)) into 0
* [misc]backup-simplify:  Simplify (- (/ 0 PI) (+ (* (* 180 (/ (acos v2_y) PI)) (/ 0 PI)))) into 0
* [misc]backup-simplify:  Simplify (/ 0 (* 2 (sqrt (* 180 (/ (acos v2_y) PI))))) into 0
* [misc]taylor:  Taking taylor expansion of (sqrt (/ (* (acos v2_y) 180) PI)) in v2_y
* [misc]taylor:  Taking taylor expansion of (/ (* (acos v2_y) 180) PI) in v2_y
* [misc]taylor:  Taking taylor expansion of (* (acos v2_y) 180) in v2_y
* [misc]taylor:  Taking taylor expansion of (acos v2_y) in v2_y
* [misc]backup-simplify:  Simplify (acos v2_y) into (acos v2_y)
* [misc]taylor:  Taking taylor expansion of 180 in v2_y
* [misc]backup-simplify:  Simplify 180 into 180
* [misc]taylor:  Taking taylor expansion of PI in v2_y
* [misc]backup-simplify:  Simplify PI into PI
* [misc]backup-simplify:  Simplify (* (acos v2_y) 180) into (* 180 (acos v2_y))
* [misc]backup-simplify:  Simplify (/ (* 180 (acos v2_y)) PI) into (* 180 (/ (acos v2_y) PI))
* [misc]backup-simplify:  Simplify (sqrt (* 180 (/ (acos v2_y) PI))) into (* (sqrt 180) (sqrt (/ (acos v2_y) PI)))
* [misc]backup-simplify:  Simplify (+ (* (acos v2_y) 0) (* 0 180)) into 0
* [misc]backup-simplify:  Simplify (- (/ 0 PI) (+ (* (* 180 (/ (acos v2_y) PI)) (/ 0 PI)))) into 0
* [misc]backup-simplify:  Simplify (/ 0 (* 2 (sqrt (* 180 (/ (acos v2_y) PI))))) into 0
* [misc]backup-simplify:  Simplify (* (* (sqrt 180) (sqrt (/ (acos v2_y) PI))) (* (sqrt 180) (sqrt (/ (acos v2_y) PI)))) into (/ (* (pow (sqrt 180) 2) (acos v2_y)) PI)
* [misc]backup-simplify:  Simplify (/ (* (pow (sqrt 180) 2) (acos v2_y)) PI) into (/ (* (pow (sqrt 180) 2) (acos v2_y)) PI)
* [misc]backup-simplify:  Simplify (+ (* (* (sqrt 180) (sqrt (/ (acos v2_y) PI))) 0) (* 0 (* (sqrt 180) (sqrt (/ (acos v2_y) PI))))) into 0
* [misc]backup-simplify:  Simplify 0 into 0
* [misc]backup-simplify:  Simplify (+ (* (acos v2_y) 0) (+ (* 0 0) (* 0 180))) into 0
* [misc]backup-simplify:  Simplify (- (/ 0 PI) (+ (* (* 180 (/ (acos v2_y) PI)) (/ 0 PI)) (* 0 (/ 0 PI)))) into 0
* [misc]backup-simplify:  Simplify (/ (- 0 (pow 0 2) (+)) (* 2 (* (sqrt 180) (sqrt (/ (acos v2_y) PI))))) into 0
* [misc]backup-simplify:  Simplify (+ (* (acos v2_y) 0) (+ (* 0 0) (* 0 180))) into 0
* [misc]backup-simplify:  Simplify (- (/ 0 PI) (+ (* (* 180 (/ (acos v2_y) PI)) (/ 0 PI)) (* 0 (/ 0 PI)))) into 0
* [misc]backup-simplify:  Simplify (/ (- 0 (pow 0 2) (+)) (* 2 (* (sqrt 180) (sqrt (/ (acos v2_y) PI))))) into 0
* [misc]backup-simplify:  Simplify (+ (* (* (sqrt 180) (sqrt (/ (acos v2_y) PI))) 0) (+ (* 0 0) (* 0 (* (sqrt 180) (sqrt (/ (acos v2_y) PI)))))) into 0
* [misc]backup-simplify:  Simplify 0 into 0
* [misc]backup-simplify:  Simplify (+ (* (acos v2_y) 0) (+ (* 0 0) (+ (* 0 0) (* 0 180)))) into 0
* [misc]backup-simplify:  Simplify (- (/ 0 PI) (+ (* (* 180 (/ (acos v2_y) PI)) (/ 0 PI)) (* 0 (/ 0 PI)) (* 0 (/ 0 PI)))) into 0
* [misc]backup-simplify:  Simplify (/ (- 0 (+ (* 2 (* 0 0)))) (* 2 (* (sqrt 180) (sqrt (/ (acos v2_y) PI))))) into 0
* [misc]backup-simplify:  Simplify (+ (* (acos v2_y) 0) (+ (* 0 0) (+ (* 0 0) (* 0 180)))) into 0
* [misc]backup-simplify:  Simplify (- (/ 0 PI) (+ (* (* 180 (/ (acos v2_y) PI)) (/ 0 PI)) (* 0 (/ 0 PI)) (* 0 (/ 0 PI)))) into 0
* [misc]backup-simplify:  Simplify (/ (- 0 (+ (* 2 (* 0 0)))) (* 2 (* (sqrt 180) (sqrt (/ (acos v2_y) PI))))) into 0
* [misc]backup-simplify:  Simplify (+ (* (* (sqrt 180) (sqrt (/ (acos v2_y) PI))) 0) (+ (* 0 0) (+ (* 0 0) (* 0 (* (sqrt 180) (sqrt (/ (acos v2_y) PI))))))) into 0
* [misc]backup-simplify:  Simplify 0 into 0
* [misc]backup-simplify:  Simplify (+ (* (acos v2_y) 0) (+ (* 0 0) (+ (* 0 0) (+ (* 0 0) (* 0 180))))) into 0
* [misc]backup-simplify:  Simplify (- (/ 0 PI) (+ (* (* 180 (/ (acos v2_y) PI)) (/ 0 PI)) (* 0 (/ 0 PI)) (* 0 (/ 0 PI)) (* 0 (/ 0 PI)))) into 0
* [misc]backup-simplify:  Simplify (/ (- 0 (pow 0 2) (+ (* 2 (* 0 0)))) (* 2 (* (sqrt 180) (sqrt (/ (acos v2_y) PI))))) into 0
* [misc]backup-simplify:  Simplify (+ (* (acos v2_y) 0) (+ (* 0 0) (+ (* 0 0) (+ (* 0 0) (* 0 180))))) into 0
* [misc]backup-simplify:  Simplify (- (/ 0 PI) (+ (* (* 180 (/ (acos v2_y) PI)) (/ 0 PI)) (* 0 (/ 0 PI)) (* 0 (/ 0 PI)) (* 0 (/ 0 PI)))) into 0
* [misc]backup-simplify:  Simplify (/ (- 0 (pow 0 2) (+ (* 2 (* 0 0)))) (* 2 (* (sqrt 180) (sqrt (/ (acos v2_y) PI))))) into 0
* [misc]backup-simplify:  Simplify (+ (* (* (sqrt 180) (sqrt (/ (acos v2_y) PI))) 0) (+ (* 0 0) (+ (* 0 0) (+ (* 0 0) (* 0 (* (sqrt 180) (sqrt (/ (acos v2_y) PI)))))))) into 0
* [misc]backup-simplify:  Simplify 0 into 0
* [misc]backup-simplify:  Simplify (+ (* (acos v2_y) 0) (+ (* 0 0) (+ (* 0 0) (+ (* 0 0) (+ (* 0 0) (* 0 180)))))) into 0
* [misc]backup-simplify:  Simplify (- (/ 0 PI) (+ (* (* 180 (/ (acos v2_y) PI)) (/ 0 PI)) (* 0 (/ 0 PI)) (* 0 (/ 0 PI)) (* 0 (/ 0 PI)) (* 0 (/ 0 PI)))) into 0
* [misc]backup-simplify:  Simplify (/ (- 0 (+ (* 2 (* 0 0)) (* 2 (* 0 0)))) (* 2 (* (sqrt 180) (sqrt (/ (acos v2_y) PI))))) into 0
* [misc]backup-simplify:  Simplify (+ (* (acos v2_y) 0) (+ (* 0 0) (+ (* 0 0) (+ (* 0 0) (+ (* 0 0) (* 0 180)))))) into 0
* [misc]backup-simplify:  Simplify (- (/ 0 PI) (+ (* (* 180 (/ (acos v2_y) PI)) (/ 0 PI)) (* 0 (/ 0 PI)) (* 0 (/ 0 PI)) (* 0 (/ 0 PI)) (* 0 (/ 0 PI)))) into 0
* [misc]backup-simplify:  Simplify (/ (- 0 (+ (* 2 (* 0 0)) (* 2 (* 0 0)))) (* 2 (* (sqrt 180) (sqrt (/ (acos v2_y) PI))))) into 0
* [misc]backup-simplify:  Simplify (+ (* (* (sqrt 180) (sqrt (/ (acos v2_y) PI))) 0) (+ (* 0 0) (+ (* 0 0) (+ (* 0 0) (+ (* 0 0) (* 0 (* (sqrt 180) (sqrt (/ (acos v2_y) PI))))))))) into 0
* [misc]backup-simplify:  Simplify 0 into 0
* [misc]backup-simplify:  Simplify (+ (* (acos v2_y) 0) (+ (* 0 0) (+ (* 0 0) (+ (* 0 0) (+ (* 0 0) (+ (* 0 0) (* 0 180))))))) into 0
* [misc]backup-simplify:  Simplify (- (/ 0 PI) (+ (* (* 180 (/ (acos v2_y) PI)) (/ 0 PI)) (* 0 (/ 0 PI)) (* 0 (/ 0 PI)) (* 0 (/ 0 PI)) (* 0 (/ 0 PI)) (* 0 (/ 0 PI)))) into 0
* [misc]backup-simplify:  Simplify (/ (- 0 (pow 0 2) (+ (* 2 (* 0 0)) (* 2 (* 0 0)))) (* 2 (* (sqrt 180) (sqrt (/ (acos v2_y) PI))))) into 0
* [misc]backup-simplify:  Simplify (+ (* (acos v2_y) 0) (+ (* 0 0) (+ (* 0 0) (+ (* 0 0) (+ (* 0 0) (+ (* 0 0) (* 0 180))))))) into 0
* [misc]backup-simplify:  Simplify (- (/ 0 PI) (+ (* (* 180 (/ (acos v2_y) PI)) (/ 0 PI)) (* 0 (/ 0 PI)) (* 0 (/ 0 PI)) (* 0 (/ 0 PI)) (* 0 (/ 0 PI)) (* 0 (/ 0 PI)))) into 0
* [misc]backup-simplify:  Simplify (/ (- 0 (pow 0 2) (+ (* 2 (* 0 0)) (* 2 (* 0 0)))) (* 2 (* (sqrt 180) (sqrt (/ (acos v2_y) PI))))) into 0
* [misc]backup-simplify:  Simplify (+ (* (* (sqrt 180) (sqrt (/ (acos v2_y) PI))) 0) (+ (* 0 0) (+ (* 0 0) (+ (* 0 0) (+ (* 0 0) (+ (* 0 0) (* 0 (* (sqrt 180) (sqrt (/ (acos v2_y) PI)))))))))) into 0
* [misc]backup-simplify:  Simplify 0 into 0
* [misc]backup-simplify:  Simplify (/ (* (pow (sqrt 180) 2) (acos v2_y)) PI) into (/ (* (pow (sqrt 180) 2) (acos v2_y)) PI)
* [misc]approximate:  Taking taylor expansion of (* (sqrt (/ (* (acos (/ 1 v2_y)) 180) PI)) (sqrt (/ (* (acos (/ 1 v2_y)) 180) PI))) in (v2_y) around 0
* [misc]taylor:  Taking taylor expansion of (* (sqrt (/ (* (acos (/ 1 v2_y)) 180) PI)) (sqrt (/ (* (acos (/ 1 v2_y)) 180) PI))) in v2_y
* [misc]taylor:  Taking taylor expansion of (sqrt (/ (* (acos (/ 1 v2_y)) 180) PI)) in v2_y
* [misc]taylor:  Taking taylor expansion of (/ (* (acos (/ 1 v2_y)) 180) PI) in v2_y
* [misc]taylor:  Taking taylor expansion of (* (acos (/ 1 v2_y)) 180) in v2_y
* [misc]taylor:  Taking taylor expansion of (acos (/ 1 v2_y)) in v2_y
* [misc]backup-simplify:  Simplify (acos (/ 1 v2_y)) into (acos (/ 1 v2_y))
* [misc]taylor:  Taking taylor expansion of 180 in v2_y
* [misc]backup-simplify:  Simplify 180 into 180
* [misc]taylor:  Taking taylor expansion of PI in v2_y
* [misc]backup-simplify:  Simplify PI into PI
* [misc]backup-simplify:  Simplify (* (acos (/ 1 v2_y)) 180) into (* 180 (acos (/ 1 v2_y)))
* [misc]backup-simplify:  Simplify (/ (* 180 (acos (/ 1 v2_y))) PI) into (* 180 (/ (acos (/ 1 v2_y)) PI))
* [misc]backup-simplify:  Simplify (sqrt (* 180 (/ (acos (/ 1 v2_y)) PI))) into (* (sqrt 180) (sqrt (/ (acos (/ 1 v2_y)) PI)))
* [misc]backup-simplify:  Simplify (+ (* (acos (/ 1 v2_y)) 0) (* 0 180)) into 0
* [misc]backup-simplify:  Simplify (- (/ 0 PI) (+ (* (* 180 (/ (acos (/ 1 v2_y)) PI)) (/ 0 PI)))) into 0
* [misc]backup-simplify:  Simplify (/ 0 (* 2 (sqrt (* 180 (/ (acos (/ 1 v2_y)) PI))))) into 0
* [misc]taylor:  Taking taylor expansion of (sqrt (/ (* (acos (/ 1 v2_y)) 180) PI)) in v2_y
* [misc]taylor:  Taking taylor expansion of (/ (* (acos (/ 1 v2_y)) 180) PI) in v2_y
* [misc]taylor:  Taking taylor expansion of (* (acos (/ 1 v2_y)) 180) in v2_y
* [misc]taylor:  Taking taylor expansion of (acos (/ 1 v2_y)) in v2_y
* [misc]backup-simplify:  Simplify (acos (/ 1 v2_y)) into (acos (/ 1 v2_y))
* [misc]taylor:  Taking taylor expansion of 180 in v2_y
* [misc]backup-simplify:  Simplify 180 into 180
* [misc]taylor:  Taking taylor expansion of PI in v2_y
* [misc]backup-simplify:  Simplify PI into PI
* [misc]backup-simplify:  Simplify (* (acos (/ 1 v2_y)) 180) into (* 180 (acos (/ 1 v2_y)))
* [misc]backup-simplify:  Simplify (/ (* 180 (acos (/ 1 v2_y))) PI) into (* 180 (/ (acos (/ 1 v2_y)) PI))
* [misc]backup-simplify:  Simplify (sqrt (* 180 (/ (acos (/ 1 v2_y)) PI))) into (* (sqrt 180) (sqrt (/ (acos (/ 1 v2_y)) PI)))
* [misc]backup-simplify:  Simplify (+ (* (acos (/ 1 v2_y)) 0) (* 0 180)) into 0
* [misc]backup-simplify:  Simplify (- (/ 0 PI) (+ (* (* 180 (/ (acos (/ 1 v2_y)) PI)) (/ 0 PI)))) into 0
* [misc]backup-simplify:  Simplify (/ 0 (* 2 (sqrt (* 180 (/ (acos (/ 1 v2_y)) PI))))) into 0
* [misc]taylor:  Taking taylor expansion of (* (sqrt (/ (* (acos (/ 1 v2_y)) 180) PI)) (sqrt (/ (* (acos (/ 1 v2_y)) 180) PI))) in v2_y
* [misc]taylor:  Taking taylor expansion of (sqrt (/ (* (acos (/ 1 v2_y)) 180) PI)) in v2_y
* [misc]taylor:  Taking taylor expansion of (/ (* (acos (/ 1 v2_y)) 180) PI) in v2_y
* [misc]taylor:  Taking taylor expansion of (* (acos (/ 1 v2_y)) 180) in v2_y
* [misc]taylor:  Taking taylor expansion of (acos (/ 1 v2_y)) in v2_y
* [misc]backup-simplify:  Simplify (acos (/ 1 v2_y)) into (acos (/ 1 v2_y))
* [misc]taylor:  Taking taylor expansion of 180 in v2_y
* [misc]backup-simplify:  Simplify 180 into 180
* [misc]taylor:  Taking taylor expansion of PI in v2_y
* [misc]backup-simplify:  Simplify PI into PI
* [misc]backup-simplify:  Simplify (* (acos (/ 1 v2_y)) 180) into (* 180 (acos (/ 1 v2_y)))
* [misc]backup-simplify:  Simplify (/ (* 180 (acos (/ 1 v2_y))) PI) into (* 180 (/ (acos (/ 1 v2_y)) PI))
* [misc]backup-simplify:  Simplify (sqrt (* 180 (/ (acos (/ 1 v2_y)) PI))) into (* (sqrt 180) (sqrt (/ (acos (/ 1 v2_y)) PI)))
* [misc]backup-simplify:  Simplify (+ (* (acos (/ 1 v2_y)) 0) (* 0 180)) into 0
* [misc]backup-simplify:  Simplify (- (/ 0 PI) (+ (* (* 180 (/ (acos (/ 1 v2_y)) PI)) (/ 0 PI)))) into 0
* [misc]backup-simplify:  Simplify (/ 0 (* 2 (sqrt (* 180 (/ (acos (/ 1 v2_y)) PI))))) into 0
* [misc]taylor:  Taking taylor expansion of (sqrt (/ (* (acos (/ 1 v2_y)) 180) PI)) in v2_y
* [misc]taylor:  Taking taylor expansion of (/ (* (acos (/ 1 v2_y)) 180) PI) in v2_y
* [misc]taylor:  Taking taylor expansion of (* (acos (/ 1 v2_y)) 180) in v2_y
* [misc]taylor:  Taking taylor expansion of (acos (/ 1 v2_y)) in v2_y
* [misc]backup-simplify:  Simplify (acos (/ 1 v2_y)) into (acos (/ 1 v2_y))
* [misc]taylor:  Taking taylor expansion of 180 in v2_y
* [misc]backup-simplify:  Simplify 180 into 180
* [misc]taylor:  Taking taylor expansion of PI in v2_y
* [misc]backup-simplify:  Simplify PI into PI
* [misc]backup-simplify:  Simplify (* (acos (/ 1 v2_y)) 180) into (* 180 (acos (/ 1 v2_y)))
* [misc]backup-simplify:  Simplify (/ (* 180 (acos (/ 1 v2_y))) PI) into (* 180 (/ (acos (/ 1 v2_y)) PI))
* [misc]backup-simplify:  Simplify (sqrt (* 180 (/ (acos (/ 1 v2_y)) PI))) into (* (sqrt 180) (sqrt (/ (acos (/ 1 v2_y)) PI)))
* [misc]backup-simplify:  Simplify (+ (* (acos (/ 1 v2_y)) 0) (* 0 180)) into 0
* [misc]backup-simplify:  Simplify (- (/ 0 PI) (+ (* (* 180 (/ (acos (/ 1 v2_y)) PI)) (/ 0 PI)))) into 0
* [misc]backup-simplify:  Simplify (/ 0 (* 2 (sqrt (* 180 (/ (acos (/ 1 v2_y)) PI))))) into 0
* [misc]backup-simplify:  Simplify (* (* (sqrt 180) (sqrt (/ (acos (/ 1 v2_y)) PI))) (* (sqrt 180) (sqrt (/ (acos (/ 1 v2_y)) PI)))) into (/ (* (pow (sqrt 180) 2) (acos (/ 1 v2_y))) PI)
* [misc]backup-simplify:  Simplify (/ (* (pow (sqrt 180) 2) (acos (/ 1 v2_y))) PI) into (/ (* (pow (sqrt 180) 2) (acos (/ 1 v2_y))) PI)
* [misc]backup-simplify:  Simplify (+ (* (* (sqrt 180) (sqrt (/ (acos (/ 1 v2_y)) PI))) 0) (* 0 (* (sqrt 180) (sqrt (/ (acos (/ 1 v2_y)) PI))))) into 0
* [misc]backup-simplify:  Simplify 0 into 0
* [misc]backup-simplify:  Simplify (+ (* (acos (/ 1 v2_y)) 0) (+ (* 0 0) (* 0 180))) into 0
* [misc]backup-simplify:  Simplify (- (/ 0 PI) (+ (* (* 180 (/ (acos (/ 1 v2_y)) PI)) (/ 0 PI)) (* 0 (/ 0 PI)))) into 0
* [misc]backup-simplify:  Simplify (/ (- 0 (pow 0 2) (+)) (* 2 (* (sqrt 180) (sqrt (/ (acos (/ 1 v2_y)) PI))))) into 0
* [misc]backup-simplify:  Simplify (+ (* (acos (/ 1 v2_y)) 0) (+ (* 0 0) (* 0 180))) into 0
* [misc]backup-simplify:  Simplify (- (/ 0 PI) (+ (* (* 180 (/ (acos (/ 1 v2_y)) PI)) (/ 0 PI)) (* 0 (/ 0 PI)))) into 0
* [misc]backup-simplify:  Simplify (/ (- 0 (pow 0 2) (+)) (* 2 (* (sqrt 180) (sqrt (/ (acos (/ 1 v2_y)) PI))))) into 0
* [misc]backup-simplify:  Simplify (+ (* (* (sqrt 180) (sqrt (/ (acos (/ 1 v2_y)) PI))) 0) (+ (* 0 0) (* 0 (* (sqrt 180) (sqrt (/ (acos (/ 1 v2_y)) PI)))))) into 0
* [misc]backup-simplify:  Simplify 0 into 0
* [misc]backup-simplify:  Simplify (+ (* (acos (/ 1 v2_y)) 0) (+ (* 0 0) (+ (* 0 0) (* 0 180)))) into 0
* [misc]backup-simplify:  Simplify (- (/ 0 PI) (+ (* (* 180 (/ (acos (/ 1 v2_y)) PI)) (/ 0 PI)) (* 0 (/ 0 PI)) (* 0 (/ 0 PI)))) into 0
* [misc]backup-simplify:  Simplify (/ (- 0 (+ (* 2 (* 0 0)))) (* 2 (* (sqrt 180) (sqrt (/ (acos (/ 1 v2_y)) PI))))) into 0
* [misc]backup-simplify:  Simplify (+ (* (acos (/ 1 v2_y)) 0) (+ (* 0 0) (+ (* 0 0) (* 0 180)))) into 0
* [misc]backup-simplify:  Simplify (- (/ 0 PI) (+ (* (* 180 (/ (acos (/ 1 v2_y)) PI)) (/ 0 PI)) (* 0 (/ 0 PI)) (* 0 (/ 0 PI)))) into 0
* [misc]backup-simplify:  Simplify (/ (- 0 (+ (* 2 (* 0 0)))) (* 2 (* (sqrt 180) (sqrt (/ (acos (/ 1 v2_y)) PI))))) into 0
* [misc]backup-simplify:  Simplify (+ (* (* (sqrt 180) (sqrt (/ (acos (/ 1 v2_y)) PI))) 0) (+ (* 0 0) (+ (* 0 0) (* 0 (* (sqrt 180) (sqrt (/ (acos (/ 1 v2_y)) PI))))))) into 0
* [misc]backup-simplify:  Simplify 0 into 0
* [misc]backup-simplify:  Simplify (+ (* (acos (/ 1 v2_y)) 0) (+ (* 0 0) (+ (* 0 0) (+ (* 0 0) (* 0 180))))) into 0
* [misc]backup-simplify:  Simplify (- (/ 0 PI) (+ (* (* 180 (/ (acos (/ 1 v2_y)) PI)) (/ 0 PI)) (* 0 (/ 0 PI)) (* 0 (/ 0 PI)) (* 0 (/ 0 PI)))) into 0
* [misc]backup-simplify:  Simplify (/ (- 0 (pow 0 2) (+ (* 2 (* 0 0)))) (* 2 (* (sqrt 180) (sqrt (/ (acos (/ 1 v2_y)) PI))))) into 0
* [misc]backup-simplify:  Simplify (+ (* (acos (/ 1 v2_y)) 0) (+ (* 0 0) (+ (* 0 0) (+ (* 0 0) (* 0 180))))) into 0
* [misc]backup-simplify:  Simplify (- (/ 0 PI) (+ (* (* 180 (/ (acos (/ 1 v2_y)) PI)) (/ 0 PI)) (* 0 (/ 0 PI)) (* 0 (/ 0 PI)) (* 0 (/ 0 PI)))) into 0
* [misc]backup-simplify:  Simplify (/ (- 0 (pow 0 2) (+ (* 2 (* 0 0)))) (* 2 (* (sqrt 180) (sqrt (/ (acos (/ 1 v2_y)) PI))))) into 0
* [misc]backup-simplify:  Simplify (+ (* (* (sqrt 180) (sqrt (/ (acos (/ 1 v2_y)) PI))) 0) (+ (* 0 0) (+ (* 0 0) (+ (* 0 0) (* 0 (* (sqrt 180) (sqrt (/ (acos (/ 1 v2_y)) PI)))))))) into 0
* [misc]backup-simplify:  Simplify 0 into 0
* [misc]backup-simplify:  Simplify (+ (* (acos (/ 1 v2_y)) 0) (+ (* 0 0) (+ (* 0 0) (+ (* 0 0) (+ (* 0 0) (* 0 180)))))) into 0
* [misc]backup-simplify:  Simplify (- (/ 0 PI) (+ (* (* 180 (/ (acos (/ 1 v2_y)) PI)) (/ 0 PI)) (* 0 (/ 0 PI)) (* 0 (/ 0 PI)) (* 0 (/ 0 PI)) (* 0 (/ 0 PI)))) into 0
* [misc]backup-simplify:  Simplify (/ (- 0 (+ (* 2 (* 0 0)) (* 2 (* 0 0)))) (* 2 (* (sqrt 180) (sqrt (/ (acos (/ 1 v2_y)) PI))))) into 0
* [misc]backup-simplify:  Simplify (+ (* (acos (/ 1 v2_y)) 0) (+ (* 0 0) (+ (* 0 0) (+ (* 0 0) (+ (* 0 0) (* 0 180)))))) into 0
* [misc]backup-simplify:  Simplify (- (/ 0 PI) (+ (* (* 180 (/ (acos (/ 1 v2_y)) PI)) (/ 0 PI)) (* 0 (/ 0 PI)) (* 0 (/ 0 PI)) (* 0 (/ 0 PI)) (* 0 (/ 0 PI)))) into 0
* [misc]backup-simplify:  Simplify (/ (- 0 (+ (* 2 (* 0 0)) (* 2 (* 0 0)))) (* 2 (* (sqrt 180) (sqrt (/ (acos (/ 1 v2_y)) PI))))) into 0
* [misc]backup-simplify:  Simplify (+ (* (* (sqrt 180) (sqrt (/ (acos (/ 1 v2_y)) PI))) 0) (+ (* 0 0) (+ (* 0 0) (+ (* 0 0) (+ (* 0 0) (* 0 (* (sqrt 180) (sqrt (/ (acos (/ 1 v2_y)) PI))))))))) into 0
* [misc]backup-simplify:  Simplify 0 into 0
* [misc]backup-simplify:  Simplify (+ (* (acos (/ 1 v2_y)) 0) (+ (* 0 0) (+ (* 0 0) (+ (* 0 0) (+ (* 0 0) (+ (* 0 0) (* 0 180))))))) into 0
* [misc]backup-simplify:  Simplify (- (/ 0 PI) (+ (* (* 180 (/ (acos (/ 1 v2_y)) PI)) (/ 0 PI)) (* 0 (/ 0 PI)) (* 0 (/ 0 PI)) (* 0 (/ 0 PI)) (* 0 (/ 0 PI)) (* 0 (/ 0 PI)))) into 0
* [misc]backup-simplify:  Simplify (/ (- 0 (pow 0 2) (+ (* 2 (* 0 0)) (* 2 (* 0 0)))) (* 2 (* (sqrt 180) (sqrt (/ (acos (/ 1 v2_y)) PI))))) into 0
* [misc]backup-simplify:  Simplify (+ (* (acos (/ 1 v2_y)) 0) (+ (* 0 0) (+ (* 0 0) (+ (* 0 0) (+ (* 0 0) (+ (* 0 0) (* 0 180))))))) into 0
* [misc]backup-simplify:  Simplify (- (/ 0 PI) (+ (* (* 180 (/ (acos (/ 1 v2_y)) PI)) (/ 0 PI)) (* 0 (/ 0 PI)) (* 0 (/ 0 PI)) (* 0 (/ 0 PI)) (* 0 (/ 0 PI)) (* 0 (/ 0 PI)))) into 0
* [misc]backup-simplify:  Simplify (/ (- 0 (pow 0 2) (+ (* 2 (* 0 0)) (* 2 (* 0 0)))) (* 2 (* (sqrt 180) (sqrt (/ (acos (/ 1 v2_y)) PI))))) into 0
* [misc]backup-simplify:  Simplify (+ (* (* (sqrt 180) (sqrt (/ (acos (/ 1 v2_y)) PI))) 0) (+ (* 0 0) (+ (* 0 0) (+ (* 0 0) (+ (* 0 0) (+ (* 0 0) (* 0 (* (sqrt 180) (sqrt (/ (acos (/ 1 v2_y)) PI)))))))))) into 0
* [misc]backup-simplify:  Simplify 0 into 0
* [misc]backup-simplify:  Simplify (/ (* (pow (sqrt 180) 2) (acos (/ 1 (/ 1 v2_y)))) PI) into (/ (* (pow (sqrt 180) 2) (acos v2_y)) PI)
* [misc]approximate:  Taking taylor expansion of (* (sqrt (/ (* (acos (/ 1 (- v2_y))) 180) PI)) (sqrt (/ (* (acos (/ 1 (- v2_y))) 180) PI))) in (v2_y) around 0
* [misc]taylor:  Taking taylor expansion of (* (sqrt (/ (* (acos (/ 1 (- v2_y))) 180) PI)) (sqrt (/ (* (acos (/ 1 (- v2_y))) 180) PI))) in v2_y
* [misc]taylor:  Taking taylor expansion of (sqrt (/ (* (acos (/ 1 (- v2_y))) 180) PI)) in v2_y
* [misc]taylor:  Taking taylor expansion of (/ (* (acos (/ 1 (- v2_y))) 180) PI) in v2_y
* [misc]taylor:  Taking taylor expansion of (* (acos (/ 1 (- v2_y))) 180) in v2_y
* [misc]taylor:  Taking taylor expansion of (acos (/ 1 (- v2_y))) in v2_y
* [misc]backup-simplify:  Simplify (acos (/ 1 (- v2_y))) into (acos (/ -1 v2_y))
* [misc]taylor:  Taking taylor expansion of 180 in v2_y
* [misc]backup-simplify:  Simplify 180 into 180
* [misc]taylor:  Taking taylor expansion of PI in v2_y
* [misc]backup-simplify:  Simplify PI into PI
* [misc]backup-simplify:  Simplify (* (acos (/ -1 v2_y)) 180) into (* 180 (acos (/ -1 v2_y)))
* [misc]backup-simplify:  Simplify (/ (* 180 (acos (/ -1 v2_y))) PI) into (* 180 (/ (acos (/ -1 v2_y)) PI))
* [misc]backup-simplify:  Simplify (sqrt (* 180 (/ (acos (/ -1 v2_y)) PI))) into (* (sqrt 180) (sqrt (/ (acos (/ -1 v2_y)) PI)))
* [misc]backup-simplify:  Simplify (+ (* (acos (/ -1 v2_y)) 0) (* 0 180)) into 0
* [misc]backup-simplify:  Simplify (- (/ 0 PI) (+ (* (* 180 (/ (acos (/ -1 v2_y)) PI)) (/ 0 PI)))) into 0
* [misc]backup-simplify:  Simplify (/ 0 (* 2 (sqrt (* 180 (/ (acos (/ -1 v2_y)) PI))))) into 0
* [misc]taylor:  Taking taylor expansion of (sqrt (/ (* (acos (/ 1 (- v2_y))) 180) PI)) in v2_y
* [misc]taylor:  Taking taylor expansion of (/ (* (acos (/ 1 (- v2_y))) 180) PI) in v2_y
* [misc]taylor:  Taking taylor expansion of (* (acos (/ 1 (- v2_y))) 180) in v2_y
* [misc]taylor:  Taking taylor expansion of (acos (/ 1 (- v2_y))) in v2_y
* [misc]backup-simplify:  Simplify (acos (/ 1 (- v2_y))) into (acos (/ -1 v2_y))
* [misc]taylor:  Taking taylor expansion of 180 in v2_y
* [misc]backup-simplify:  Simplify 180 into 180
* [misc]taylor:  Taking taylor expansion of PI in v2_y
* [misc]backup-simplify:  Simplify PI into PI
* [misc]backup-simplify:  Simplify (* (acos (/ -1 v2_y)) 180) into (* 180 (acos (/ -1 v2_y)))
* [misc]backup-simplify:  Simplify (/ (* 180 (acos (/ -1 v2_y))) PI) into (* 180 (/ (acos (/ -1 v2_y)) PI))
* [misc]backup-simplify:  Simplify (sqrt (* 180 (/ (acos (/ -1 v2_y)) PI))) into (* (sqrt 180) (sqrt (/ (acos (/ -1 v2_y)) PI)))
* [misc]backup-simplify:  Simplify (+ (* (acos (/ -1 v2_y)) 0) (* 0 180)) into 0
* [misc]backup-simplify:  Simplify (- (/ 0 PI) (+ (* (* 180 (/ (acos (/ -1 v2_y)) PI)) (/ 0 PI)))) into 0
* [misc]backup-simplify:  Simplify (/ 0 (* 2 (sqrt (* 180 (/ (acos (/ -1 v2_y)) PI))))) into 0
* [misc]taylor:  Taking taylor expansion of (* (sqrt (/ (* (acos (/ 1 (- v2_y))) 180) PI)) (sqrt (/ (* (acos (/ 1 (- v2_y))) 180) PI))) in v2_y
* [misc]taylor:  Taking taylor expansion of (sqrt (/ (* (acos (/ 1 (- v2_y))) 180) PI)) in v2_y
* [misc]taylor:  Taking taylor expansion of (/ (* (acos (/ 1 (- v2_y))) 180) PI) in v2_y
* [misc]taylor:  Taking taylor expansion of (* (acos (/ 1 (- v2_y))) 180) in v2_y
* [misc]taylor:  Taking taylor expansion of (acos (/ 1 (- v2_y))) in v2_y
* [misc]backup-simplify:  Simplify (acos (/ 1 (- v2_y))) into (acos (/ -1 v2_y))
* [misc]taylor:  Taking taylor expansion of 180 in v2_y
* [misc]backup-simplify:  Simplify 180 into 180
* [misc]taylor:  Taking taylor expansion of PI in v2_y
* [misc]backup-simplify:  Simplify PI into PI
* [misc]backup-simplify:  Simplify (* (acos (/ -1 v2_y)) 180) into (* 180 (acos (/ -1 v2_y)))
* [misc]backup-simplify:  Simplify (/ (* 180 (acos (/ -1 v2_y))) PI) into (* 180 (/ (acos (/ -1 v2_y)) PI))
* [misc]backup-simplify:  Simplify (sqrt (* 180 (/ (acos (/ -1 v2_y)) PI))) into (* (sqrt 180) (sqrt (/ (acos (/ -1 v2_y)) PI)))
* [misc]backup-simplify:  Simplify (+ (* (acos (/ -1 v2_y)) 0) (* 0 180)) into 0
* [misc]backup-simplify:  Simplify (- (/ 0 PI) (+ (* (* 180 (/ (acos (/ -1 v2_y)) PI)) (/ 0 PI)))) into 0
* [misc]backup-simplify:  Simplify (/ 0 (* 2 (sqrt (* 180 (/ (acos (/ -1 v2_y)) PI))))) into 0
* [misc]taylor:  Taking taylor expansion of (sqrt (/ (* (acos (/ 1 (- v2_y))) 180) PI)) in v2_y
* [misc]taylor:  Taking taylor expansion of (/ (* (acos (/ 1 (- v2_y))) 180) PI) in v2_y
* [misc]taylor:  Taking taylor expansion of (* (acos (/ 1 (- v2_y))) 180) in v2_y
* [misc]taylor:  Taking taylor expansion of (acos (/ 1 (- v2_y))) in v2_y
* [misc]backup-simplify:  Simplify (acos (/ 1 (- v2_y))) into (acos (/ -1 v2_y))
* [misc]taylor:  Taking taylor expansion of 180 in v2_y
* [misc]backup-simplify:  Simplify 180 into 180
* [misc]taylor:  Taking taylor expansion of PI in v2_y
* [misc]backup-simplify:  Simplify PI into PI
* [misc]backup-simplify:  Simplify (* (acos (/ -1 v2_y)) 180) into (* 180 (acos (/ -1 v2_y)))
* [misc]backup-simplify:  Simplify (/ (* 180 (acos (/ -1 v2_y))) PI) into (* 180 (/ (acos (/ -1 v2_y)) PI))
* [misc]backup-simplify:  Simplify (sqrt (* 180 (/ (acos (/ -1 v2_y)) PI))) into (* (sqrt 180) (sqrt (/ (acos (/ -1 v2_y)) PI)))
* [misc]backup-simplify:  Simplify (+ (* (acos (/ -1 v2_y)) 0) (* 0 180)) into 0
* [misc]backup-simplify:  Simplify (- (/ 0 PI) (+ (* (* 180 (/ (acos (/ -1 v2_y)) PI)) (/ 0 PI)))) into 0
* [misc]backup-simplify:  Simplify (/ 0 (* 2 (sqrt (* 180 (/ (acos (/ -1 v2_y)) PI))))) into 0
* [misc]backup-simplify:  Simplify (* (* (sqrt 180) (sqrt (/ (acos (/ -1 v2_y)) PI))) (* (sqrt 180) (sqrt (/ (acos (/ -1 v2_y)) PI)))) into (/ (* (pow (sqrt 180) 2) (acos (/ -1 v2_y))) PI)
* [misc]backup-simplify:  Simplify (/ (* (pow (sqrt 180) 2) (acos (/ -1 v2_y))) PI) into (/ (* (pow (sqrt 180) 2) (acos (/ -1 v2_y))) PI)
* [misc]backup-simplify:  Simplify (+ (* (* (sqrt 180) (sqrt (/ (acos (/ -1 v2_y)) PI))) 0) (* 0 (* (sqrt 180) (sqrt (/ (acos (/ -1 v2_y)) PI))))) into 0
* [misc]backup-simplify:  Simplify 0 into 0
* [misc]backup-simplify:  Simplify (+ (* (acos (/ -1 v2_y)) 0) (+ (* 0 0) (* 0 180))) into 0
* [misc]backup-simplify:  Simplify (- (/ 0 PI) (+ (* (* 180 (/ (acos (/ -1 v2_y)) PI)) (/ 0 PI)) (* 0 (/ 0 PI)))) into 0
* [misc]backup-simplify:  Simplify (/ (- 0 (pow 0 2) (+)) (* 2 (* (sqrt 180) (sqrt (/ (acos (/ -1 v2_y)) PI))))) into 0
* [misc]backup-simplify:  Simplify (+ (* (acos (/ -1 v2_y)) 0) (+ (* 0 0) (* 0 180))) into 0
* [misc]backup-simplify:  Simplify (- (/ 0 PI) (+ (* (* 180 (/ (acos (/ -1 v2_y)) PI)) (/ 0 PI)) (* 0 (/ 0 PI)))) into 0
* [misc]backup-simplify:  Simplify (/ (- 0 (pow 0 2) (+)) (* 2 (* (sqrt 180) (sqrt (/ (acos (/ -1 v2_y)) PI))))) into 0
* [misc]backup-simplify:  Simplify (+ (* (* (sqrt 180) (sqrt (/ (acos (/ -1 v2_y)) PI))) 0) (+ (* 0 0) (* 0 (* (sqrt 180) (sqrt (/ (acos (/ -1 v2_y)) PI)))))) into 0
* [misc]backup-simplify:  Simplify 0 into 0
* [misc]backup-simplify:  Simplify (+ (* (acos (/ -1 v2_y)) 0) (+ (* 0 0) (+ (* 0 0) (* 0 180)))) into 0
* [misc]backup-simplify:  Simplify (- (/ 0 PI) (+ (* (* 180 (/ (acos (/ -1 v2_y)) PI)) (/ 0 PI)) (* 0 (/ 0 PI)) (* 0 (/ 0 PI)))) into 0
* [misc]backup-simplify:  Simplify (/ (- 0 (+ (* 2 (* 0 0)))) (* 2 (* (sqrt 180) (sqrt (/ (acos (/ -1 v2_y)) PI))))) into 0
* [misc]backup-simplify:  Simplify (+ (* (acos (/ -1 v2_y)) 0) (+ (* 0 0) (+ (* 0 0) (* 0 180)))) into 0
* [misc]backup-simplify:  Simplify (- (/ 0 PI) (+ (* (* 180 (/ (acos (/ -1 v2_y)) PI)) (/ 0 PI)) (* 0 (/ 0 PI)) (* 0 (/ 0 PI)))) into 0
* [misc]backup-simplify:  Simplify (/ (- 0 (+ (* 2 (* 0 0)))) (* 2 (* (sqrt 180) (sqrt (/ (acos (/ -1 v2_y)) PI))))) into 0
* [misc]backup-simplify:  Simplify (+ (* (* (sqrt 180) (sqrt (/ (acos (/ -1 v2_y)) PI))) 0) (+ (* 0 0) (+ (* 0 0) (* 0 (* (sqrt 180) (sqrt (/ (acos (/ -1 v2_y)) PI))))))) into 0
* [misc]backup-simplify:  Simplify 0 into 0
* [misc]backup-simplify:  Simplify (+ (* (acos (/ -1 v2_y)) 0) (+ (* 0 0) (+ (* 0 0) (+ (* 0 0) (* 0 180))))) into 0
* [misc]backup-simplify:  Simplify (- (/ 0 PI) (+ (* (* 180 (/ (acos (/ -1 v2_y)) PI)) (/ 0 PI)) (* 0 (/ 0 PI)) (* 0 (/ 0 PI)) (* 0 (/ 0 PI)))) into 0
* [misc]backup-simplify:  Simplify (/ (- 0 (pow 0 2) (+ (* 2 (* 0 0)))) (* 2 (* (sqrt 180) (sqrt (/ (acos (/ -1 v2_y)) PI))))) into 0
* [misc]backup-simplify:  Simplify (+ (* (acos (/ -1 v2_y)) 0) (+ (* 0 0) (+ (* 0 0) (+ (* 0 0) (* 0 180))))) into 0
* [misc]backup-simplify:  Simplify (- (/ 0 PI) (+ (* (* 180 (/ (acos (/ -1 v2_y)) PI)) (/ 0 PI)) (* 0 (/ 0 PI)) (* 0 (/ 0 PI)) (* 0 (/ 0 PI)))) into 0
* [misc]backup-simplify:  Simplify (/ (- 0 (pow 0 2) (+ (* 2 (* 0 0)))) (* 2 (* (sqrt 180) (sqrt (/ (acos (/ -1 v2_y)) PI))))) into 0
* [misc]backup-simplify:  Simplify (+ (* (* (sqrt 180) (sqrt (/ (acos (/ -1 v2_y)) PI))) 0) (+ (* 0 0) (+ (* 0 0) (+ (* 0 0) (* 0 (* (sqrt 180) (sqrt (/ (acos (/ -1 v2_y)) PI)))))))) into 0
* [misc]backup-simplify:  Simplify 0 into 0
* [misc]backup-simplify:  Simplify (+ (* (acos (/ -1 v2_y)) 0) (+ (* 0 0) (+ (* 0 0) (+ (* 0 0) (+ (* 0 0) (* 0 180)))))) into 0
* [misc]backup-simplify:  Simplify (- (/ 0 PI) (+ (* (* 180 (/ (acos (/ -1 v2_y)) PI)) (/ 0 PI)) (* 0 (/ 0 PI)) (* 0 (/ 0 PI)) (* 0 (/ 0 PI)) (* 0 (/ 0 PI)))) into 0
* [misc]backup-simplify:  Simplify (/ (- 0 (+ (* 2 (* 0 0)) (* 2 (* 0 0)))) (* 2 (* (sqrt 180) (sqrt (/ (acos (/ -1 v2_y)) PI))))) into 0
* [misc]backup-simplify:  Simplify (+ (* (acos (/ -1 v2_y)) 0) (+ (* 0 0) (+ (* 0 0) (+ (* 0 0) (+ (* 0 0) (* 0 180)))))) into 0
* [misc]backup-simplify:  Simplify (- (/ 0 PI) (+ (* (* 180 (/ (acos (/ -1 v2_y)) PI)) (/ 0 PI)) (* 0 (/ 0 PI)) (* 0 (/ 0 PI)) (* 0 (/ 0 PI)) (* 0 (/ 0 PI)))) into 0
* [misc]backup-simplify:  Simplify (/ (- 0 (+ (* 2 (* 0 0)) (* 2 (* 0 0)))) (* 2 (* (sqrt 180) (sqrt (/ (acos (/ -1 v2_y)) PI))))) into 0
* [misc]backup-simplify:  Simplify (+ (* (* (sqrt 180) (sqrt (/ (acos (/ -1 v2_y)) PI))) 0) (+ (* 0 0) (+ (* 0 0) (+ (* 0 0) (+ (* 0 0) (* 0 (* (sqrt 180) (sqrt (/ (acos (/ -1 v2_y)) PI))))))))) into 0
* [misc]backup-simplify:  Simplify 0 into 0
* [misc]backup-simplify:  Simplify (+ (* (acos (/ -1 v2_y)) 0) (+ (* 0 0) (+ (* 0 0) (+ (* 0 0) (+ (* 0 0) (+ (* 0 0) (* 0 180))))))) into 0
* [misc]backup-simplify:  Simplify (- (/ 0 PI) (+ (* (* 180 (/ (acos (/ -1 v2_y)) PI)) (/ 0 PI)) (* 0 (/ 0 PI)) (* 0 (/ 0 PI)) (* 0 (/ 0 PI)) (* 0 (/ 0 PI)) (* 0 (/ 0 PI)))) into 0
* [misc]backup-simplify:  Simplify (/ (- 0 (pow 0 2) (+ (* 2 (* 0 0)) (* 2 (* 0 0)))) (* 2 (* (sqrt 180) (sqrt (/ (acos (/ -1 v2_y)) PI))))) into 0
* [misc]backup-simplify:  Simplify (+ (* (acos (/ -1 v2_y)) 0) (+ (* 0 0) (+ (* 0 0) (+ (* 0 0) (+ (* 0 0) (+ (* 0 0) (* 0 180))))))) into 0
* [misc]backup-simplify:  Simplify (- (/ 0 PI) (+ (* (* 180 (/ (acos (/ -1 v2_y)) PI)) (/ 0 PI)) (* 0 (/ 0 PI)) (* 0 (/ 0 PI)) (* 0 (/ 0 PI)) (* 0 (/ 0 PI)) (* 0 (/ 0 PI)))) into 0
* [misc]backup-simplify:  Simplify (/ (- 0 (pow 0 2) (+ (* 2 (* 0 0)) (* 2 (* 0 0)))) (* 2 (* (sqrt 180) (sqrt (/ (acos (/ -1 v2_y)) PI))))) into 0
* [misc]backup-simplify:  Simplify (+ (* (* (sqrt 180) (sqrt (/ (acos (/ -1 v2_y)) PI))) 0) (+ (* 0 0) (+ (* 0 0) (+ (* 0 0) (+ (* 0 0) (+ (* 0 0) (* 0 (* (sqrt 180) (sqrt (/ (acos (/ -1 v2_y)) PI)))))))))) into 0
* [misc]backup-simplify:  Simplify 0 into 0
* [misc]backup-simplify:  Simplify (/ (* (pow (sqrt 180) 2) (acos (/ -1 (/ 1 (- v2_y))))) PI) into (/ (* (pow (sqrt 180) 2) (acos v2_y)) PI)
* * * * [misc]progress:  [ 2 / 4 ] generating series at (2 2 2 1 1 1)
* [misc]approximate:  Taking taylor expansion of (acos v2_y) in (v2_y) around 0
* [misc]taylor:  Taking taylor expansion of (acos v2_y) in v2_y
* [misc]backup-simplify:  Simplify (acos v2_y) into (acos v2_y)
* [misc]taylor:  Taking taylor expansion of (acos v2_y) in v2_y
* [misc]backup-simplify:  Simplify (acos v2_y) into (acos v2_y)
* [misc]backup-simplify:  Simplify (acos v2_y) into (acos v2_y)
* [misc]backup-simplify:  Simplify 0 into 0
* [misc]backup-simplify:  Simplify 0 into 0
* [misc]backup-simplify:  Simplify 0 into 0
* [misc]backup-simplify:  Simplify 0 into 0
* [misc]backup-simplify:  Simplify 0 into 0
* [misc]backup-simplify:  Simplify 0 into 0
* [misc]backup-simplify:  Simplify (acos v2_y) into (acos v2_y)
* [misc]approximate:  Taking taylor expansion of (acos (/ 1 v2_y)) in (v2_y) around 0
* [misc]taylor:  Taking taylor expansion of (acos (/ 1 v2_y)) in v2_y
* [misc]backup-simplify:  Simplify (acos (/ 1 v2_y)) into (acos (/ 1 v2_y))
* [misc]taylor:  Taking taylor expansion of (acos (/ 1 v2_y)) in v2_y
* [misc]backup-simplify:  Simplify (acos (/ 1 v2_y)) into (acos (/ 1 v2_y))
* [misc]backup-simplify:  Simplify (acos (/ 1 v2_y)) into (acos (/ 1 v2_y))
* [misc]backup-simplify:  Simplify 0 into 0
* [misc]backup-simplify:  Simplify 0 into 0
* [misc]backup-simplify:  Simplify 0 into 0
* [misc]backup-simplify:  Simplify 0 into 0
* [misc]backup-simplify:  Simplify 0 into 0
* [misc]backup-simplify:  Simplify 0 into 0
* [misc]backup-simplify:  Simplify (acos (/ 1 (/ 1 v2_y))) into (acos v2_y)
* [misc]approximate:  Taking taylor expansion of (acos (/ 1 (- v2_y))) in (v2_y) around 0
* [misc]taylor:  Taking taylor expansion of (acos (/ 1 (- v2_y))) in v2_y
* [misc]backup-simplify:  Simplify (acos (/ 1 (- v2_y))) into (acos (/ -1 v2_y))
* [misc]taylor:  Taking taylor expansion of (acos (/ 1 (- v2_y))) in v2_y
* [misc]backup-simplify:  Simplify (acos (/ 1 (- v2_y))) into (acos (/ -1 v2_y))
* [misc]backup-simplify:  Simplify (acos (/ -1 v2_y)) into (acos (/ -1 v2_y))
* [misc]backup-simplify:  Simplify 0 into 0
* [misc]backup-simplify:  Simplify 0 into 0
* [misc]backup-simplify:  Simplify 0 into 0
* [misc]backup-simplify:  Simplify 0 into 0
* [misc]backup-simplify:  Simplify 0 into 0
* [misc]backup-simplify:  Simplify 0 into 0
* [misc]backup-simplify:  Simplify (acos (/ -1 (/ 1 (- v2_y)))) into (acos v2_y)
* * * * [misc]progress:  [ 3 / 4 ] generating series at (2 2 1 1 1 1)
* [misc]approximate:  Taking taylor expansion of (acos v2_y) in (v2_y) around 0
* [misc]taylor:  Taking taylor expansion of (acos v2_y) in v2_y
* [misc]backup-simplify:  Simplify (acos v2_y) into (acos v2_y)
* [misc]taylor:  Taking taylor expansion of (acos v2_y) in v2_y
* [misc]backup-simplify:  Simplify (acos v2_y) into (acos v2_y)
* [misc]backup-simplify:  Simplify (acos v2_y) into (acos v2_y)
* [misc]backup-simplify:  Simplify 0 into 0
* [misc]backup-simplify:  Simplify 0 into 0
* [misc]backup-simplify:  Simplify 0 into 0
* [misc]backup-simplify:  Simplify 0 into 0
* [misc]backup-simplify:  Simplify 0 into 0
* [misc]backup-simplify:  Simplify 0 into 0
* [misc]backup-simplify:  Simplify (acos v2_y) into (acos v2_y)
* [misc]approximate:  Taking taylor expansion of (acos (/ 1 v2_y)) in (v2_y) around 0
* [misc]taylor:  Taking taylor expansion of (acos (/ 1 v2_y)) in v2_y
* [misc]backup-simplify:  Simplify (acos (/ 1 v2_y)) into (acos (/ 1 v2_y))
* [misc]taylor:  Taking taylor expansion of (acos (/ 1 v2_y)) in v2_y
* [misc]backup-simplify:  Simplify (acos (/ 1 v2_y)) into (acos (/ 1 v2_y))
* [misc]backup-simplify:  Simplify (acos (/ 1 v2_y)) into (acos (/ 1 v2_y))
* [misc]backup-simplify:  Simplify 0 into 0
* [misc]backup-simplify:  Simplify 0 into 0
* [misc]backup-simplify:  Simplify 0 into 0
* [misc]backup-simplify:  Simplify 0 into 0
* [misc]backup-simplify:  Simplify 0 into 0
* [misc]backup-simplify:  Simplify 0 into 0
* [misc]backup-simplify:  Simplify (acos (/ 1 (/ 1 v2_y))) into (acos v2_y)
* [misc]approximate:  Taking taylor expansion of (acos (/ 1 (- v2_y))) in (v2_y) around 0
* [misc]taylor:  Taking taylor expansion of (acos (/ 1 (- v2_y))) in v2_y
* [misc]backup-simplify:  Simplify (acos (/ 1 (- v2_y))) into (acos (/ -1 v2_y))
* [misc]taylor:  Taking taylor expansion of (acos (/ 1 (- v2_y))) in v2_y
* [misc]backup-simplify:  Simplify (acos (/ 1 (- v2_y))) into (acos (/ -1 v2_y))
* [misc]backup-simplify:  Simplify (acos (/ -1 v2_y)) into (acos (/ -1 v2_y))
* [misc]backup-simplify:  Simplify 0 into 0
* [misc]backup-simplify:  Simplify 0 into 0
* [misc]backup-simplify:  Simplify 0 into 0
* [misc]backup-simplify:  Simplify 0 into 0
* [misc]backup-simplify:  Simplify 0 into 0
* [misc]backup-simplify:  Simplify 0 into 0
* [misc]backup-simplify:  Simplify (acos (/ -1 (/ 1 (- v2_y)))) into (acos v2_y)
* * * * [misc]progress:  [ 4 / 4 ] generating series at (2 2 2 1)
* [misc]approximate:  Taking taylor expansion of (/ (* (acos v2_y) 180) PI) in (v2_y) around 0
* [misc]taylor:  Taking taylor expansion of (/ (* (acos v2_y) 180) PI) in v2_y
* [misc]taylor:  Taking taylor expansion of (* (acos v2_y) 180) in v2_y
* [misc]taylor:  Taking taylor expansion of (acos v2_y) in v2_y
* [misc]backup-simplify:  Simplify (acos v2_y) into (acos v2_y)
* [misc]taylor:  Taking taylor expansion of 180 in v2_y
* [misc]backup-simplify:  Simplify 180 into 180
* [misc]taylor:  Taking taylor expansion of PI in v2_y
* [misc]backup-simplify:  Simplify PI into PI
* [misc]backup-simplify:  Simplify (* (acos v2_y) 180) into (* 180 (acos v2_y))
* [misc]backup-simplify:  Simplify (/ (* 180 (acos v2_y)) PI) into (* 180 (/ (acos v2_y) PI))
* [misc]taylor:  Taking taylor expansion of (/ (* (acos v2_y) 180) PI) in v2_y
* [misc]taylor:  Taking taylor expansion of (* (acos v2_y) 180) in v2_y
* [misc]taylor:  Taking taylor expansion of (acos v2_y) in v2_y
* [misc]backup-simplify:  Simplify (acos v2_y) into (acos v2_y)
* [misc]taylor:  Taking taylor expansion of 180 in v2_y
* [misc]backup-simplify:  Simplify 180 into 180
* [misc]taylor:  Taking taylor expansion of PI in v2_y
* [misc]backup-simplify:  Simplify PI into PI
* [misc]backup-simplify:  Simplify (* (acos v2_y) 180) into (* 180 (acos v2_y))
* [misc]backup-simplify:  Simplify (/ (* 180 (acos v2_y)) PI) into (* 180 (/ (acos v2_y) PI))
* [misc]backup-simplify:  Simplify (* 180 (/ (acos v2_y) PI)) into (* 180 (/ (acos v2_y) PI))
* [misc]backup-simplify:  Simplify (+ (* (acos v2_y) 0) (* 0 180)) into 0
* [misc]backup-simplify:  Simplify (- (/ 0 PI) (+ (* (* 180 (/ (acos v2_y) PI)) (/ 0 PI)))) into 0
* [misc]backup-simplify:  Simplify 0 into 0
* [misc]backup-simplify:  Simplify (+ (* (acos v2_y) 0) (+ (* 0 0) (* 0 180))) into 0
* [misc]backup-simplify:  Simplify (- (/ 0 PI) (+ (* (* 180 (/ (acos v2_y) PI)) (/ 0 PI)) (* 0 (/ 0 PI)))) into 0
* [misc]backup-simplify:  Simplify 0 into 0
* [misc]backup-simplify:  Simplify (+ (* (acos v2_y) 0) (+ (* 0 0) (+ (* 0 0) (* 0 180)))) into 0
* [misc]backup-simplify:  Simplify (- (/ 0 PI) (+ (* (* 180 (/ (acos v2_y) PI)) (/ 0 PI)) (* 0 (/ 0 PI)) (* 0 (/ 0 PI)))) into 0
* [misc]backup-simplify:  Simplify 0 into 0
* [misc]backup-simplify:  Simplify (+ (* (acos v2_y) 0) (+ (* 0 0) (+ (* 0 0) (+ (* 0 0) (* 0 180))))) into 0
* [misc]backup-simplify:  Simplify (- (/ 0 PI) (+ (* (* 180 (/ (acos v2_y) PI)) (/ 0 PI)) (* 0 (/ 0 PI)) (* 0 (/ 0 PI)) (* 0 (/ 0 PI)))) into 0
* [misc]backup-simplify:  Simplify 0 into 0
* [misc]backup-simplify:  Simplify (+ (* (acos v2_y) 0) (+ (* 0 0) (+ (* 0 0) (+ (* 0 0) (+ (* 0 0) (* 0 180)))))) into 0
* [misc]backup-simplify:  Simplify (- (/ 0 PI) (+ (* (* 180 (/ (acos v2_y) PI)) (/ 0 PI)) (* 0 (/ 0 PI)) (* 0 (/ 0 PI)) (* 0 (/ 0 PI)) (* 0 (/ 0 PI)))) into 0
* [misc]backup-simplify:  Simplify 0 into 0
* [misc]backup-simplify:  Simplify (+ (* (acos v2_y) 0) (+ (* 0 0) (+ (* 0 0) (+ (* 0 0) (+ (* 0 0) (+ (* 0 0) (* 0 180))))))) into 0
* [misc]backup-simplify:  Simplify (- (/ 0 PI) (+ (* (* 180 (/ (acos v2_y) PI)) (/ 0 PI)) (* 0 (/ 0 PI)) (* 0 (/ 0 PI)) (* 0 (/ 0 PI)) (* 0 (/ 0 PI)) (* 0 (/ 0 PI)))) into 0
* [misc]backup-simplify:  Simplify 0 into 0
* [misc]backup-simplify:  Simplify (* 180 (/ (acos v2_y) PI)) into (* 180 (/ (acos v2_y) PI))
* [misc]approximate:  Taking taylor expansion of (/ (* (acos (/ 1 v2_y)) 180) PI) in (v2_y) around 0
* [misc]taylor:  Taking taylor expansion of (/ (* (acos (/ 1 v2_y)) 180) PI) in v2_y
* [misc]taylor:  Taking taylor expansion of (* (acos (/ 1 v2_y)) 180) in v2_y
* [misc]taylor:  Taking taylor expansion of (acos (/ 1 v2_y)) in v2_y
* [misc]backup-simplify:  Simplify (acos (/ 1 v2_y)) into (acos (/ 1 v2_y))
* [misc]taylor:  Taking taylor expansion of 180 in v2_y
* [misc]backup-simplify:  Simplify 180 into 180
* [misc]taylor:  Taking taylor expansion of PI in v2_y
* [misc]backup-simplify:  Simplify PI into PI
* [misc]backup-simplify:  Simplify (* (acos (/ 1 v2_y)) 180) into (* 180 (acos (/ 1 v2_y)))
* [misc]backup-simplify:  Simplify (/ (* 180 (acos (/ 1 v2_y))) PI) into (* 180 (/ (acos (/ 1 v2_y)) PI))
* [misc]taylor:  Taking taylor expansion of (/ (* (acos (/ 1 v2_y)) 180) PI) in v2_y
* [misc]taylor:  Taking taylor expansion of (* (acos (/ 1 v2_y)) 180) in v2_y
* [misc]taylor:  Taking taylor expansion of (acos (/ 1 v2_y)) in v2_y
* [misc]backup-simplify:  Simplify (acos (/ 1 v2_y)) into (acos (/ 1 v2_y))
* [misc]taylor:  Taking taylor expansion of 180 in v2_y
* [misc]backup-simplify:  Simplify 180 into 180
* [misc]taylor:  Taking taylor expansion of PI in v2_y
* [misc]backup-simplify:  Simplify PI into PI
* [misc]backup-simplify:  Simplify (* (acos (/ 1 v2_y)) 180) into (* 180 (acos (/ 1 v2_y)))
* [misc]backup-simplify:  Simplify (/ (* 180 (acos (/ 1 v2_y))) PI) into (* 180 (/ (acos (/ 1 v2_y)) PI))
* [misc]backup-simplify:  Simplify (* 180 (/ (acos (/ 1 v2_y)) PI)) into (* 180 (/ (acos (/ 1 v2_y)) PI))
* [misc]backup-simplify:  Simplify (+ (* (acos (/ 1 v2_y)) 0) (* 0 180)) into 0
* [misc]backup-simplify:  Simplify (- (/ 0 PI) (+ (* (* 180 (/ (acos (/ 1 v2_y)) PI)) (/ 0 PI)))) into 0
* [misc]backup-simplify:  Simplify 0 into 0
* [misc]backup-simplify:  Simplify (+ (* (acos (/ 1 v2_y)) 0) (+ (* 0 0) (* 0 180))) into 0
* [misc]backup-simplify:  Simplify (- (/ 0 PI) (+ (* (* 180 (/ (acos (/ 1 v2_y)) PI)) (/ 0 PI)) (* 0 (/ 0 PI)))) into 0
* [misc]backup-simplify:  Simplify 0 into 0
* [misc]backup-simplify:  Simplify (+ (* (acos (/ 1 v2_y)) 0) (+ (* 0 0) (+ (* 0 0) (* 0 180)))) into 0
* [misc]backup-simplify:  Simplify (- (/ 0 PI) (+ (* (* 180 (/ (acos (/ 1 v2_y)) PI)) (/ 0 PI)) (* 0 (/ 0 PI)) (* 0 (/ 0 PI)))) into 0
* [misc]backup-simplify:  Simplify 0 into 0
* [misc]backup-simplify:  Simplify (+ (* (acos (/ 1 v2_y)) 0) (+ (* 0 0) (+ (* 0 0) (+ (* 0 0) (* 0 180))))) into 0
* [misc]backup-simplify:  Simplify (- (/ 0 PI) (+ (* (* 180 (/ (acos (/ 1 v2_y)) PI)) (/ 0 PI)) (* 0 (/ 0 PI)) (* 0 (/ 0 PI)) (* 0 (/ 0 PI)))) into 0
* [misc]backup-simplify:  Simplify 0 into 0
* [misc]backup-simplify:  Simplify (+ (* (acos (/ 1 v2_y)) 0) (+ (* 0 0) (+ (* 0 0) (+ (* 0 0) (+ (* 0 0) (* 0 180)))))) into 0
* [misc]backup-simplify:  Simplify (- (/ 0 PI) (+ (* (* 180 (/ (acos (/ 1 v2_y)) PI)) (/ 0 PI)) (* 0 (/ 0 PI)) (* 0 (/ 0 PI)) (* 0 (/ 0 PI)) (* 0 (/ 0 PI)))) into 0
* [misc]backup-simplify:  Simplify 0 into 0
* [misc]backup-simplify:  Simplify (+ (* (acos (/ 1 v2_y)) 0) (+ (* 0 0) (+ (* 0 0) (+ (* 0 0) (+ (* 0 0) (+ (* 0 0) (* 0 180))))))) into 0
* [misc]backup-simplify:  Simplify (- (/ 0 PI) (+ (* (* 180 (/ (acos (/ 1 v2_y)) PI)) (/ 0 PI)) (* 0 (/ 0 PI)) (* 0 (/ 0 PI)) (* 0 (/ 0 PI)) (* 0 (/ 0 PI)) (* 0 (/ 0 PI)))) into 0
* [misc]backup-simplify:  Simplify 0 into 0
* [misc]backup-simplify:  Simplify (* 180 (/ (acos (/ 1 (/ 1 v2_y))) PI)) into (* 180 (/ (acos v2_y) PI))
* [misc]approximate:  Taking taylor expansion of (/ (* (acos (/ 1 (- v2_y))) 180) PI) in (v2_y) around 0
* [misc]taylor:  Taking taylor expansion of (/ (* (acos (/ 1 (- v2_y))) 180) PI) in v2_y
* [misc]taylor:  Taking taylor expansion of (* (acos (/ 1 (- v2_y))) 180) in v2_y
* [misc]taylor:  Taking taylor expansion of (acos (/ 1 (- v2_y))) in v2_y
* [misc]backup-simplify:  Simplify (acos (/ 1 (- v2_y))) into (acos (/ -1 v2_y))
* [misc]taylor:  Taking taylor expansion of 180 in v2_y
* [misc]backup-simplify:  Simplify 180 into 180
* [misc]taylor:  Taking taylor expansion of PI in v2_y
* [misc]backup-simplify:  Simplify PI into PI
* [misc]backup-simplify:  Simplify (* (acos (/ -1 v2_y)) 180) into (* 180 (acos (/ -1 v2_y)))
* [misc]backup-simplify:  Simplify (/ (* 180 (acos (/ -1 v2_y))) PI) into (* 180 (/ (acos (/ -1 v2_y)) PI))
* [misc]taylor:  Taking taylor expansion of (/ (* (acos (/ 1 (- v2_y))) 180) PI) in v2_y
* [misc]taylor:  Taking taylor expansion of (* (acos (/ 1 (- v2_y))) 180) in v2_y
* [misc]taylor:  Taking taylor expansion of (acos (/ 1 (- v2_y))) in v2_y
* [misc]backup-simplify:  Simplify (acos (/ 1 (- v2_y))) into (acos (/ -1 v2_y))
* [misc]taylor:  Taking taylor expansion of 180 in v2_y
* [misc]backup-simplify:  Simplify 180 into 180
* [misc]taylor:  Taking taylor expansion of PI in v2_y
* [misc]backup-simplify:  Simplify PI into PI
* [misc]backup-simplify:  Simplify (* (acos (/ -1 v2_y)) 180) into (* 180 (acos (/ -1 v2_y)))
* [misc]backup-simplify:  Simplify (/ (* 180 (acos (/ -1 v2_y))) PI) into (* 180 (/ (acos (/ -1 v2_y)) PI))
* [misc]backup-simplify:  Simplify (* 180 (/ (acos (/ -1 v2_y)) PI)) into (* 180 (/ (acos (/ -1 v2_y)) PI))
* [misc]backup-simplify:  Simplify (+ (* (acos (/ -1 v2_y)) 0) (* 0 180)) into 0
* [misc]backup-simplify:  Simplify (- (/ 0 PI) (+ (* (* 180 (/ (acos (/ -1 v2_y)) PI)) (/ 0 PI)))) into 0
* [misc]backup-simplify:  Simplify 0 into 0
* [misc]backup-simplify:  Simplify (+ (* (acos (/ -1 v2_y)) 0) (+ (* 0 0) (* 0 180))) into 0
* [misc]backup-simplify:  Simplify (- (/ 0 PI) (+ (* (* 180 (/ (acos (/ -1 v2_y)) PI)) (/ 0 PI)) (* 0 (/ 0 PI)))) into 0
* [misc]backup-simplify:  Simplify 0 into 0
* [misc]backup-simplify:  Simplify (+ (* (acos (/ -1 v2_y)) 0) (+ (* 0 0) (+ (* 0 0) (* 0 180)))) into 0
* [misc]backup-simplify:  Simplify (- (/ 0 PI) (+ (* (* 180 (/ (acos (/ -1 v2_y)) PI)) (/ 0 PI)) (* 0 (/ 0 PI)) (* 0 (/ 0 PI)))) into 0
* [misc]backup-simplify:  Simplify 0 into 0
* [misc]backup-simplify:  Simplify (+ (* (acos (/ -1 v2_y)) 0) (+ (* 0 0) (+ (* 0 0) (+ (* 0 0) (* 0 180))))) into 0
* [misc]backup-simplify:  Simplify (- (/ 0 PI) (+ (* (* 180 (/ (acos (/ -1 v2_y)) PI)) (/ 0 PI)) (* 0 (/ 0 PI)) (* 0 (/ 0 PI)) (* 0 (/ 0 PI)))) into 0
* [misc]backup-simplify:  Simplify 0 into 0
* [misc]backup-simplify:  Simplify (+ (* (acos (/ -1 v2_y)) 0) (+ (* 0 0) (+ (* 0 0) (+ (* 0 0) (+ (* 0 0) (* 0 180)))))) into 0
* [misc]backup-simplify:  Simplify (- (/ 0 PI) (+ (* (* 180 (/ (acos (/ -1 v2_y)) PI)) (/ 0 PI)) (* 0 (/ 0 PI)) (* 0 (/ 0 PI)) (* 0 (/ 0 PI)) (* 0 (/ 0 PI)))) into 0
* [misc]backup-simplify:  Simplify 0 into 0
* [misc]backup-simplify:  Simplify (+ (* (acos (/ -1 v2_y)) 0) (+ (* 0 0) (+ (* 0 0) (+ (* 0 0) (+ (* 0 0) (+ (* 0 0) (* 0 180))))))) into 0
* [misc]backup-simplify:  Simplify (- (/ 0 PI) (+ (* (* 180 (/ (acos (/ -1 v2_y)) PI)) (/ 0 PI)) (* 0 (/ 0 PI)) (* 0 (/ 0 PI)) (* 0 (/ 0 PI)) (* 0 (/ 0 PI)) (* 0 (/ 0 PI)))) into 0
* [misc]backup-simplify:  Simplify 0 into 0
* [misc]backup-simplify:  Simplify (* 180 (/ (acos (/ -1 (/ 1 (- v2_y)))) PI)) into (* 180 (/ (acos v2_y) PI))
* * * [misc]progress:  simplifying candidates
* * * * [misc]progress:  [ 1 / 74 ] simplifiying candidate #<alt-delta (λ (v2_y) (- 180 (pow (/ (* (acos v2_y) 180) PI) (+ 1/2 1/2))))>
* [enter]simplify:  Simplifying (+ 1/2 1/2)
* * [misc]simplify:  iters left: 2 (2 enodes)
* [exit]simplify:  Simplified to (+ 1/2 1/2)
* [exit]simplify:  Simplified to (+ 1/2 1/2)
* * * * [misc]progress:  [ 2 / 74 ] simplifiying candidate #<alt-delta (λ (v2_y) (- 180 (pow (sqrt (/ (* (acos v2_y) 180) PI)) (+ 1 1))))>
* [enter]simplify:  Simplifying (+ 1 1)
* * [misc]simplify:  iters left: 2 (2 enodes)
* * [misc]simplify:  iters left: 1 (4 enodes)
* [exit]simplify:  Simplified to (+ 1 1)
* [exit]simplify:  Simplified to (+ 1 1)
* * * * [misc]progress:  [ 3 / 74 ] simplifiying candidate #<alt-delta (λ (v2_y) (- 180 (pow (* (/ (* (acos v2_y) 180) PI) (/ (* (acos v2_y) 180) PI)) 1/2)))>
* [enter]simplify:  Simplifying (* (/ (* (acos v2_y) 180) PI) (/ (* (acos v2_y) 180) PI))
* * [misc]simplify:  iters left: 6 (7 enodes)
* * [misc]simplify:  iters left: 5 (14 enodes)
* * [misc]simplify:  iters left: 4 (35 enodes)
* * [misc]simplify:  iters left: 3 (84 enodes)
* * [misc]simplify:  iters left: 2 (183 enodes)
* * [misc]simplify:  iters left: 1 (328 enodes)
* [exit]simplify:  Simplified to (* (* (/ 180 PI) (acos v2_y)) (* (/ 180 PI) (acos v2_y)))
* [exit]simplify:  Simplified to (* (* (/ 180 PI) (acos v2_y)) (* (/ 180 PI) (acos v2_y)))
* * * * [misc]progress:  [ 4 / 74 ] simplifiying candidate #<alt-delta (λ (v2_y) (- 180 (pow (* (sqrt (/ (* (acos v2_y) 180) PI)) (sqrt (/ (* (acos v2_y) 180) PI))) 1)))>
* [enter]simplify:  Simplifying (* (sqrt (/ (* (acos v2_y) 180) PI)) (sqrt (/ (* (acos v2_y) 180) PI)))
* * [misc]simplify:  iters left: 6 (8 enodes)
* * [misc]simplify:  iters left: 5 (11 enodes)
* * [misc]simplify:  iters left: 4 (14 enodes)
* * [misc]simplify:  iters left: 3 (17 enodes)
* * [misc]simplify:  iters left: 2 (19 enodes)
* * [misc]simplify:  iters left: 1 (20 enodes)
* [exit]simplify:  Simplified to (* (/ 180 PI) (acos v2_y))
* [exit]simplify:  Simplified to (* (/ 180 PI) (acos v2_y))
* * * * [misc]progress:  [ 5 / 74 ] simplifiying candidate #<alt-delta (λ (v2_y) (- 180 (pow (sqrt (/ (* (acos v2_y) 180) PI)) 2)))>
* * * * [misc]progress:  [ 6 / 74 ] simplifiying candidate #<alt-delta (λ (v2_y) (- 180 (pow (sqrt (/ (* (acos v2_y) 180) PI)) (+ 1 1))))>
* [enter]simplify:  Simplifying (+ 1 1)
* * [misc]simplify:  iters left: 2 (2 enodes)
* * [misc]simplify:  iters left: 1 (4 enodes)
* [exit]simplify:  Simplified to (+ 1 1)
* [exit]simplify:  Simplified to (+ 1 1)
* * * * [misc]progress:  [ 7 / 74 ] simplifiying candidate #<alt-delta (λ (v2_y) (- 180 (pow (* (sqrt (/ (* (acos v2_y) 180) PI)) (sqrt (/ (* (acos v2_y) 180) PI))) 1)))>
* * * * [misc]progress:  [ 8 / 74 ] simplifiying candidate #<alt-delta (λ (v2_y) (- 180 (exp (+ (log (sqrt (/ (* (acos v2_y) 180) PI))) (log (sqrt (/ (* (acos v2_y) 180) PI)))))))>
* [enter]simplify:  Simplifying (+ (log (sqrt (/ (* (acos v2_y) 180) PI))) (log (sqrt (/ (* (acos v2_y) 180) PI))))
* * [misc]simplify:  iters left: 6 (9 enodes)
* * [misc]simplify:  iters left: 5 (12 enodes)
* * [misc]simplify:  iters left: 4 (14 enodes)
* * [misc]simplify:  iters left: 3 (17 enodes)
* * [misc]simplify:  iters left: 2 (19 enodes)
* * [misc]simplify:  iters left: 1 (20 enodes)
* [exit]simplify:  Simplified to (+ (log (sqrt (/ (acos v2_y) (/ PI 180)))) (log (sqrt (/ (acos v2_y) (/ PI 180)))))
* [exit]simplify:  Simplified to (+ (log (sqrt (/ (acos v2_y) (/ PI 180)))) (log (sqrt (/ (acos v2_y) (/ PI 180)))))
* * * * [misc]progress:  [ 9 / 74 ] simplifiying candidate #<alt-delta (λ (v2_y) (- 180 (exp (log (* (sqrt (/ (* (acos v2_y) 180) PI)) (sqrt (/ (* (acos v2_y) 180) PI)))))))>
* [enter]simplify:  Simplifying (log (* (sqrt (/ (* (acos v2_y) 180) PI)) (sqrt (/ (* (acos v2_y) 180) PI))))
* * [misc]simplify:  iters left: 6 (9 enodes)
* * [misc]simplify:  iters left: 5 (14 enodes)
* * [misc]simplify:  iters left: 4 (23 enodes)
* * [misc]simplify:  iters left: 3 (36 enodes)
* * [misc]simplify:  iters left: 2 (52 enodes)
* * [misc]simplify:  iters left: 1 (66 enodes)
* [exit]simplify:  Simplified to (log (* (/ 180 PI) (acos v2_y)))
* [exit]simplify:  Simplified to (log (* (/ 180 PI) (acos v2_y)))
* * * * [misc]progress:  [ 10 / 74 ] simplifiying candidate #<alt-delta (λ (v2_y) (- 180 (log (exp (* (sqrt (/ (* (acos v2_y) 180) PI)) (sqrt (/ (* (acos v2_y) 180) PI)))))))>
* [enter]simplify:  Simplifying (exp (* (sqrt (/ (* (acos v2_y) 180) PI)) (sqrt (/ (* (acos v2_y) 180) PI))))
* * [misc]simplify:  iters left: 6 (9 enodes)
* * [misc]simplify:  iters left: 5 (14 enodes)
* * [misc]simplify:  iters left: 4 (17 enodes)
* * [misc]simplify:  iters left: 3 (20 enodes)
* * [misc]simplify:  iters left: 2 (22 enodes)
* * [misc]simplify:  iters left: 1 (23 enodes)
* [exit]simplify:  Simplified to (exp (/ (acos v2_y) (/ PI 180)))
* [exit]simplify:  Simplified to (exp (/ (acos v2_y) (/ PI 180)))
* * * * [misc]progress:  [ 11 / 74 ] simplifiying candidate #<alt-delta (λ (v2_y) (- 180 (cbrt (* (* (* (sqrt (/ (* (acos v2_y) 180) PI)) (sqrt (/ (* (acos v2_y) 180) PI))) (sqrt (/ (* (acos v2_y) 180) PI))) (* (* (sqrt (/ (* (acos v2_y) 180) PI)) (sqrt (/ (* (acos v2_y) 180) PI))) (sqrt (/ (* (acos v2_y) 180) PI)))))))>
* [enter]simplify:  Simplifying (* (* (* (sqrt (/ (* (acos v2_y) 180) PI)) (sqrt (/ (* (acos v2_y) 180) PI))) (sqrt (/ (* (acos v2_y) 180) PI))) (* (* (sqrt (/ (* (acos v2_y) 180) PI)) (sqrt (/ (* (acos v2_y) 180) PI))) (sqrt (/ (* (acos v2_y) 180) PI))))
* * [misc]simplify:  iters left: 6 (10 enodes)
* * [misc]simplify:  iters left: 5 (18 enodes)
* * [misc]simplify:  iters left: 4 (45 enodes)
* * [misc]simplify:  iters left: 3 (173 enodes)
* [exit]simplify:  Simplified to (pow (* (/ 180 PI) (acos v2_y)) 3)
* [exit]simplify:  Simplified to (pow (* (/ 180 PI) (acos v2_y)) 3)
* * * * [misc]progress:  [ 12 / 74 ] simplifiying candidate #<alt-delta (λ (v2_y) (- 180 (* (* (cbrt (* (sqrt (/ (* (acos v2_y) 180) PI)) (sqrt (/ (* (acos v2_y) 180) PI)))) (cbrt (* (sqrt (/ (* (acos v2_y) 180) PI)) (sqrt (/ (* (acos v2_y) 180) PI))))) (cbrt (* (sqrt (/ (* (acos v2_y) 180) PI)) (sqrt (/ (* (acos v2_y) 180) PI)))))))>
* [enter]simplify:  Simplifying (* (cbrt (* (sqrt (/ (* (acos v2_y) 180) PI)) (sqrt (/ (* (acos v2_y) 180) PI)))) (cbrt (* (sqrt (/ (* (acos v2_y) 180) PI)) (sqrt (/ (* (acos v2_y) 180) PI)))))
* * [misc]simplify:  iters left: 6 (10 enodes)
* * [misc]simplify:  iters left: 5 (13 enodes)
* * [misc]simplify:  iters left: 4 (16 enodes)
* * [misc]simplify:  iters left: 3 (19 enodes)
* * [misc]simplify:  iters left: 2 (21 enodes)
* * [misc]simplify:  iters left: 1 (22 enodes)
* [exit]simplify:  Simplified to (* (cbrt (/ (acos v2_y) (/ PI 180))) (cbrt (/ (acos v2_y) (/ PI 180))))
* [exit]simplify:  Simplified to (* (cbrt (/ (acos v2_y) (/ PI 180))) (cbrt (/ (acos v2_y) (/ PI 180))))
* [enter]simplify:  Simplifying (cbrt (* (sqrt (/ (* (acos v2_y) 180) PI)) (sqrt (/ (* (acos v2_y) 180) PI))))
* * [misc]simplify:  iters left: 6 (9 enodes)
* * [misc]simplify:  iters left: 5 (12 enodes)
* * [misc]simplify:  iters left: 4 (15 enodes)
* * [misc]simplify:  iters left: 3 (18 enodes)
* * [misc]simplify:  iters left: 2 (20 enodes)
* * [misc]simplify:  iters left: 1 (21 enodes)
* [exit]simplify:  Simplified to (cbrt (/ (acos v2_y) (/ PI 180)))
* [exit]simplify:  Simplified to (cbrt (/ (acos v2_y) (/ PI 180)))
* * * * [misc]progress:  [ 13 / 74 ] simplifiying candidate #<alt-delta (λ (v2_y) (- 180 (cbrt (* (* (* (sqrt (/ (* (acos v2_y) 180) PI)) (sqrt (/ (* (acos v2_y) 180) PI))) (* (sqrt (/ (* (acos v2_y) 180) PI)) (sqrt (/ (* (acos v2_y) 180) PI)))) (* (sqrt (/ (* (acos v2_y) 180) PI)) (sqrt (/ (* (acos v2_y) 180) PI)))))))>
* [enter]simplify:  Simplifying (* (* (* (sqrt (/ (* (acos v2_y) 180) PI)) (sqrt (/ (* (acos v2_y) 180) PI))) (* (sqrt (/ (* (acos v2_y) 180) PI)) (sqrt (/ (* (acos v2_y) 180) PI)))) (* (sqrt (/ (* (acos v2_y) 180) PI)) (sqrt (/ (* (acos v2_y) 180) PI))))
* * [misc]simplify:  iters left: 6 (10 enodes)
* * [misc]simplify:  iters left: 5 (20 enodes)
* * [misc]simplify:  iters left: 4 (55 enodes)
* * [misc]simplify:  iters left: 3 (241 enodes)
* [exit]simplify:  Simplified to (pow (* (/ 180 PI) (acos v2_y)) 3)
* [exit]simplify:  Simplified to (pow (* (/ 180 PI) (acos v2_y)) 3)
* * * * [misc]progress:  [ 14 / 74 ] simplifiying candidate #<alt-delta (λ (v2_y) (- 180 (sqrt (* (/ (* (acos v2_y) 180) PI) (/ (* (acos v2_y) 180) PI)))))>
* [enter]simplify:  Simplifying (* (/ (* (acos v2_y) 180) PI) (/ (* (acos v2_y) 180) PI))
* * [misc]simplify:  iters left: 6 (7 enodes)
* * [misc]simplify:  iters left: 5 (14 enodes)
* * [misc]simplify:  iters left: 4 (35 enodes)
* * [misc]simplify:  iters left: 3 (84 enodes)
* * [misc]simplify:  iters left: 2 (183 enodes)
* * [misc]simplify:  iters left: 1 (328 enodes)
* [exit]simplify:  Simplified to (* (* (/ 180 PI) (acos v2_y)) (* (/ 180 PI) (acos v2_y)))
* [exit]simplify:  Simplified to (* (* (/ 180 PI) (acos v2_y)) (* (/ 180 PI) (acos v2_y)))
* * * * [misc]progress:  [ 15 / 74 ] simplifiying candidate #<alt-delta (λ (v2_y) (- 180 (* (sqrt (* (sqrt (/ (* (acos v2_y) 180) PI)) (sqrt (/ (* (acos v2_y) 180) PI)))) (sqrt (* (sqrt (/ (* (acos v2_y) 180) PI)) (sqrt (/ (* (acos v2_y) 180) PI)))))))>
* [enter]simplify:  Simplifying (sqrt (* (sqrt (/ (* (acos v2_y) 180) PI)) (sqrt (/ (* (acos v2_y) 180) PI))))
* * [misc]simplify:  iters left: 6 (9 enodes)
* * [misc]simplify:  iters left: 5 (14 enodes)
* * [misc]simplify:  iters left: 4 (18 enodes)
* * [misc]simplify:  iters left: 3 (19 enodes)
* * [misc]simplify:  iters left: 2 (21 enodes)
* * [misc]simplify:  iters left: 1 (22 enodes)
* [exit]simplify:  Simplified to (sqrt (/ (acos v2_y) (/ PI 180)))
* [exit]simplify:  Simplified to (sqrt (/ (acos v2_y) (/ PI 180)))
* [enter]simplify:  Simplifying (sqrt (* (sqrt (/ (* (acos v2_y) 180) PI)) (sqrt (/ (* (acos v2_y) 180) PI))))
* * [misc]simplify:  iters left: 6 (9 enodes)
* * [misc]simplify:  iters left: 5 (14 enodes)
* * [misc]simplify:  iters left: 4 (18 enodes)
* * [misc]simplify:  iters left: 3 (19 enodes)
* * [misc]simplify:  iters left: 2 (21 enodes)
* * [misc]simplify:  iters left: 1 (22 enodes)
* [exit]simplify:  Simplified to (sqrt (/ (acos v2_y) (/ PI 180)))
* [exit]simplify:  Simplified to (sqrt (/ (acos v2_y) (/ PI 180)))
* * * * [misc]progress:  [ 16 / 74 ] simplifiying candidate #<alt-delta (λ (v2_y) (- 180 (/ (* (acos v2_y) 180) PI)))>
* * * * [misc]progress:  [ 17 / 74 ] simplifiying candidate #<alt-delta (λ (v2_y) (- 180 (/ (* (sqrt (* (acos v2_y) 180)) (sqrt (* (acos v2_y) 180))) (* (sqrt PI) (sqrt PI)))))>
* [enter]simplify:  Simplifying (* (sqrt (* (acos v2_y) 180)) (sqrt (* (acos v2_y) 180)))
* * [misc]simplify:  iters left: 6 (6 enodes)
* * [misc]simplify:  iters left: 5 (7 enodes)
* * [misc]simplify:  iters left: 4 (8 enodes)
* [exit]simplify:  Simplified to (* 180 (acos v2_y))
* [exit]simplify:  Simplified to (* 180 (acos v2_y))
* [enter]simplify:  Simplifying (* (sqrt PI) (sqrt PI))
* * [misc]simplify:  iters left: 3 (3 enodes)
* [exit]simplify:  Simplified to PI
* [exit]simplify:  Simplified to PI
* * * * [misc]progress:  [ 18 / 74 ] simplifiying candidate #<alt-delta (λ (v2_y) (- 180 (* 1 (* (sqrt (/ (* (acos v2_y) 180) PI)) (sqrt (/ (* (acos v2_y) 180) PI))))))>
* * * * [misc]progress:  [ 19 / 74 ] simplifiying candidate #<alt-delta (λ (v2_y) (- 180 (* (* (sqrt (/ (* (acos v2_y) 180) PI)) (* (cbrt (sqrt (/ (* (acos v2_y) 180) PI))) (cbrt (sqrt (/ (* (acos v2_y) 180) PI))))) (cbrt (sqrt (/ (* (acos v2_y) 180) PI))))))>
* [enter]simplify:  Simplifying (* (sqrt (/ (* (acos v2_y) 180) PI)) (* (cbrt (sqrt (/ (* (acos v2_y) 180) PI))) (cbrt (sqrt (/ (* (acos v2_y) 180) PI)))))
* * [misc]simplify:  iters left: 6 (10 enodes)
* * [misc]simplify:  iters left: 5 (16 enodes)
* * [misc]simplify:  iters left: 4 (20 enodes)
* * [misc]simplify:  iters left: 3 (23 enodes)
* * [misc]simplify:  iters left: 2 (25 enodes)
* * [misc]simplify:  iters left: 1 (26 enodes)
* [exit]simplify:  Simplified to (* (* (cbrt (sqrt (* (acos v2_y) (/ 180 PI)))) (sqrt (* (acos v2_y) (/ 180 PI)))) (cbrt (sqrt (* (acos v2_y) (/ 180 PI)))))
* [exit]simplify:  Simplified to (* (* (cbrt (sqrt (* (acos v2_y) (/ 180 PI)))) (sqrt (* (acos v2_y) (/ 180 PI)))) (cbrt (sqrt (* (acos v2_y) (/ 180 PI)))))
* * * * [misc]progress:  [ 20 / 74 ] simplifiying candidate #<alt-delta (λ (v2_y) (- 180 (* (* (sqrt (/ (* (acos v2_y) 180) PI)) (sqrt (* (cbrt (/ (* (acos v2_y) 180) PI)) (cbrt (/ (* (acos v2_y) 180) PI))))) (sqrt (cbrt (/ (* (acos v2_y) 180) PI))))))>
* [enter]simplify:  Simplifying (* (sqrt (/ (* (acos v2_y) 180) PI)) (sqrt (* (cbrt (/ (* (acos v2_y) 180) PI)) (cbrt (/ (* (acos v2_y) 180) PI)))))
* * [misc]simplify:  iters left: 6 (11 enodes)
* * [misc]simplify:  iters left: 5 (16 enodes)
* * [misc]simplify:  iters left: 4 (18 enodes)
* * [misc]simplify:  iters left: 3 (21 enodes)
* * [misc]simplify:  iters left: 2 (23 enodes)
* * [misc]simplify:  iters left: 1 (24 enodes)
* [exit]simplify:  Simplified to (* (sqrt (/ (acos v2_y) (/ PI 180))) (fabs (cbrt (/ (acos v2_y) (/ PI 180)))))
* [exit]simplify:  Simplified to (* (sqrt (/ (acos v2_y) (/ PI 180))) (fabs (cbrt (/ (acos v2_y) (/ PI 180)))))
* * * * [misc]progress:  [ 21 / 74 ] simplifiying candidate #<alt-delta (λ (v2_y) (- 180 (* (* (sqrt (/ (* (acos v2_y) 180) PI)) (sqrt (sqrt (/ (* (acos v2_y) 180) PI)))) (sqrt (sqrt (/ (* (acos v2_y) 180) PI))))))>
* [enter]simplify:  Simplifying (* (sqrt (/ (* (acos v2_y) 180) PI)) (sqrt (sqrt (/ (* (acos v2_y) 180) PI))))
* * [misc]simplify:  iters left: 6 (9 enodes)
* * [misc]simplify:  iters left: 5 (13 enodes)
* * [misc]simplify:  iters left: 4 (15 enodes)
* * [misc]simplify:  iters left: 3 (18 enodes)
* * [misc]simplify:  iters left: 2 (20 enodes)
* * [misc]simplify:  iters left: 1 (21 enodes)
* [exit]simplify:  Simplified to (* (sqrt (sqrt (/ (acos v2_y) (/ PI 180)))) (sqrt (/ (acos v2_y) (/ PI 180))))
* [exit]simplify:  Simplified to (* (sqrt (sqrt (/ (acos v2_y) (/ PI 180)))) (sqrt (/ (acos v2_y) (/ PI 180))))
* * * * [misc]progress:  [ 22 / 74 ] simplifiying candidate #<alt-delta (λ (v2_y) (- 180 (* (* (sqrt (/ (* (acos v2_y) 180) PI)) (sqrt 1)) (sqrt (/ (* (acos v2_y) 180) PI)))))>
* [enter]simplify:  Simplifying (* (sqrt (/ (* (acos v2_y) 180) PI)) (sqrt 1))
* * [misc]simplify:  iters left: 6 (10 enodes)
* * [misc]simplify:  iters left: 5 (16 enodes)
* * [misc]simplify:  iters left: 4 (18 enodes)
* * [misc]simplify:  iters left: 3 (21 enodes)
* * [misc]simplify:  iters left: 2 (23 enodes)
* * [misc]simplify:  iters left: 1 (24 enodes)
* [exit]simplify:  Simplified to (* (sqrt 1) (sqrt (/ (acos v2_y) (/ PI 180))))
* [exit]simplify:  Simplified to (* (sqrt 1) (sqrt (/ (acos v2_y) (/ PI 180))))
* * * * [misc]progress:  [ 23 / 74 ] simplifiying candidate #<alt-delta (λ (v2_y) (- 180 (* (* (sqrt (/ (* (acos v2_y) 180) PI)) (sqrt (* (acos v2_y) 180))) (sqrt (/ 1 PI)))))>
* [enter]simplify:  Simplifying (* (sqrt (/ (* (acos v2_y) 180) PI)) (sqrt (* (acos v2_y) 180)))
* * [misc]simplify:  iters left: 6 (9 enodes)
* * [misc]simplify:  iters left: 5 (13 enodes)
* * [misc]simplify:  iters left: 4 (15 enodes)
* * [misc]simplify:  iters left: 3 (18 enodes)
* * [misc]simplify:  iters left: 2 (20 enodes)
* * [misc]simplify:  iters left: 1 (21 enodes)
* [exit]simplify:  Simplified to (* (sqrt (* 180 (acos v2_y))) (sqrt (/ (acos v2_y) (/ PI 180))))
* [exit]simplify:  Simplified to (* (sqrt (* 180 (acos v2_y))) (sqrt (/ (acos v2_y) (/ PI 180))))
* * * * [misc]progress:  [ 24 / 74 ] simplifiying candidate #<alt-delta (λ (v2_y) (- 180 (* (* (sqrt (/ (* (acos v2_y) 180) PI)) (sqrt (sqrt (/ (* (acos v2_y) 180) PI)))) (sqrt (sqrt (/ (* (acos v2_y) 180) PI))))))>
* [enter]simplify:  Simplifying (* (sqrt (/ (* (acos v2_y) 180) PI)) (sqrt (sqrt (/ (* (acos v2_y) 180) PI))))
* * [misc]simplify:  iters left: 6 (9 enodes)
* * [misc]simplify:  iters left: 5 (13 enodes)
* * [misc]simplify:  iters left: 4 (15 enodes)
* * [misc]simplify:  iters left: 3 (18 enodes)
* * [misc]simplify:  iters left: 2 (20 enodes)
* * [misc]simplify:  iters left: 1 (21 enodes)
* [exit]simplify:  Simplified to (* (sqrt (sqrt (/ (acos v2_y) (/ PI 180)))) (sqrt (/ (acos v2_y) (/ PI 180))))
* [exit]simplify:  Simplified to (* (sqrt (sqrt (/ (acos v2_y) (/ PI 180)))) (sqrt (/ (acos v2_y) (/ PI 180))))
* * * * [misc]progress:  [ 25 / 74 ] simplifiying candidate #<alt-delta (λ (v2_y) (- 180 (* (* (sqrt (/ (* (acos v2_y) 180) PI)) 1) (sqrt (/ (* (acos v2_y) 180) PI)))))>
* [enter]simplify:  Simplifying (* (sqrt (/ (* (acos v2_y) 180) PI)) 1)
* * [misc]simplify:  iters left: 6 (9 enodes)
* * [misc]simplify:  iters left: 5 (15 enodes)
* * [misc]simplify:  iters left: 4 (19 enodes)
* * [misc]simplify:  iters left: 3 (22 enodes)
* * [misc]simplify:  iters left: 2 (24 enodes)
* * [misc]simplify:  iters left: 1 (25 enodes)
* [exit]simplify:  Simplified to (sqrt (* (/ 180 PI) (acos v2_y)))
* [exit]simplify:  Simplified to (sqrt (* (/ 180 PI) (acos v2_y)))
* * * * [misc]progress:  [ 26 / 74 ] simplifiying candidate #<alt-delta (λ (v2_y) (- 180 (* (* (cbrt (sqrt (/ (* (acos v2_y) 180) PI))) (cbrt (sqrt (/ (* (acos v2_y) 180) PI)))) (* (cbrt (sqrt (/ (* (acos v2_y) 180) PI))) (sqrt (/ (* (acos v2_y) 180) PI))))))>
* [enter]simplify:  Simplifying (* (cbrt (sqrt (/ (* (acos v2_y) 180) PI))) (sqrt (/ (* (acos v2_y) 180) PI)))
* * [misc]simplify:  iters left: 6 (9 enodes)
* * [misc]simplify:  iters left: 5 (13 enodes)
* * [misc]simplify:  iters left: 4 (15 enodes)
* * [misc]simplify:  iters left: 3 (18 enodes)
* * [misc]simplify:  iters left: 2 (20 enodes)
* * [misc]simplify:  iters left: 1 (21 enodes)
* [exit]simplify:  Simplified to (* (cbrt (sqrt (/ (acos v2_y) (/ PI 180)))) (sqrt (/ (acos v2_y) (/ PI 180))))
* [exit]simplify:  Simplified to (* (cbrt (sqrt (/ (acos v2_y) (/ PI 180)))) (sqrt (/ (acos v2_y) (/ PI 180))))
* * * * [misc]progress:  [ 27 / 74 ] simplifiying candidate #<alt-delta (λ (v2_y) (- 180 (* (sqrt (* (cbrt (/ (* (acos v2_y) 180) PI)) (cbrt (/ (* (acos v2_y) 180) PI)))) (* (sqrt (cbrt (/ (* (acos v2_y) 180) PI))) (sqrt (/ (* (acos v2_y) 180) PI))))))>
* [enter]simplify:  Simplifying (* (sqrt (cbrt (/ (* (acos v2_y) 180) PI))) (sqrt (/ (* (acos v2_y) 180) PI)))
* * [misc]simplify:  iters left: 6 (10 enodes)
* * [misc]simplify:  iters left: 5 (14 enodes)
* * [misc]simplify:  iters left: 4 (16 enodes)
* * [misc]simplify:  iters left: 3 (19 enodes)
* * [misc]simplify:  iters left: 2 (21 enodes)
* * [misc]simplify:  iters left: 1 (22 enodes)
* [exit]simplify:  Simplified to (* (sqrt (cbrt (/ (acos v2_y) (/ PI 180)))) (sqrt (/ (acos v2_y) (/ PI 180))))
* [exit]simplify:  Simplified to (* (sqrt (cbrt (/ (acos v2_y) (/ PI 180)))) (sqrt (/ (acos v2_y) (/ PI 180))))
* * * * [misc]progress:  [ 28 / 74 ] simplifiying candidate #<alt-delta (λ (v2_y) (- 180 (* (sqrt (sqrt (/ (* (acos v2_y) 180) PI))) (* (sqrt (sqrt (/ (* (acos v2_y) 180) PI))) (sqrt (/ (* (acos v2_y) 180) PI))))))>
* [enter]simplify:  Simplifying (* (sqrt (sqrt (/ (* (acos v2_y) 180) PI))) (sqrt (/ (* (acos v2_y) 180) PI)))
* * [misc]simplify:  iters left: 6 (9 enodes)
* * [misc]simplify:  iters left: 5 (13 enodes)
* * [misc]simplify:  iters left: 4 (15 enodes)
* * [misc]simplify:  iters left: 3 (18 enodes)
* * [misc]simplify:  iters left: 2 (20 enodes)
* * [misc]simplify:  iters left: 1 (21 enodes)
* [exit]simplify:  Simplified to (* (sqrt (sqrt (/ (acos v2_y) (/ PI 180)))) (sqrt (/ (acos v2_y) (/ PI 180))))
* [exit]simplify:  Simplified to (* (sqrt (sqrt (/ (acos v2_y) (/ PI 180)))) (sqrt (/ (acos v2_y) (/ PI 180))))
* * * * [misc]progress:  [ 29 / 74 ] simplifiying candidate #<alt-delta (λ (v2_y) (- 180 (* (sqrt 1) (* (sqrt (/ (* (acos v2_y) 180) PI)) (sqrt (/ (* (acos v2_y) 180) PI))))))>
* [enter]simplify:  Simplifying (* (sqrt (/ (* (acos v2_y) 180) PI)) (sqrt (/ (* (acos v2_y) 180) PI)))
* * [misc]simplify:  iters left: 6 (8 enodes)
* * [misc]simplify:  iters left: 5 (11 enodes)
* * [misc]simplify:  iters left: 4 (14 enodes)
* * [misc]simplify:  iters left: 3 (17 enodes)
* * [misc]simplify:  iters left: 2 (19 enodes)
* * [misc]simplify:  iters left: 1 (20 enodes)
* [exit]simplify:  Simplified to (* (/ 180 PI) (acos v2_y))
* [exit]simplify:  Simplified to (* (/ 180 PI) (acos v2_y))
* * * * [misc]progress:  [ 30 / 74 ] simplifiying candidate #<alt-delta (λ (v2_y) (- 180 (* (sqrt (* (acos v2_y) 180)) (* (sqrt (/ 1 PI)) (sqrt (/ (* (acos v2_y) 180) PI))))))>
* [enter]simplify:  Simplifying (* (sqrt (/ 1 PI)) (sqrt (/ (* (acos v2_y) 180) PI)))
* * [misc]simplify:  iters left: 6 (11 enodes)
* * [misc]simplify:  iters left: 5 (17 enodes)
* * [misc]simplify:  iters left: 4 (19 enodes)
* * [misc]simplify:  iters left: 3 (22 enodes)
* * [misc]simplify:  iters left: 2 (24 enodes)
* * [misc]simplify:  iters left: 1 (25 enodes)
* [exit]simplify:  Simplified to (* (sqrt (* (/ 180 PI) (acos v2_y))) (sqrt (/ 1 PI)))
* [exit]simplify:  Simplified to (* (sqrt (* (/ 180 PI) (acos v2_y))) (sqrt (/ 1 PI)))
* * * * [misc]progress:  [ 31 / 74 ] simplifiying candidate #<alt-delta (λ (v2_y) (- 180 (* (sqrt (sqrt (/ (* (acos v2_y) 180) PI))) (* (sqrt (sqrt (/ (* (acos v2_y) 180) PI))) (sqrt (/ (* (acos v2_y) 180) PI))))))>
* [enter]simplify:  Simplifying (* (sqrt (sqrt (/ (* (acos v2_y) 180) PI))) (sqrt (/ (* (acos v2_y) 180) PI)))
* * [misc]simplify:  iters left: 6 (9 enodes)
* * [misc]simplify:  iters left: 5 (13 enodes)
* * [misc]simplify:  iters left: 4 (15 enodes)
* * [misc]simplify:  iters left: 3 (18 enodes)
* * [misc]simplify:  iters left: 2 (20 enodes)
* * [misc]simplify:  iters left: 1 (21 enodes)
* [exit]simplify:  Simplified to (* (sqrt (sqrt (/ (acos v2_y) (/ PI 180)))) (sqrt (/ (acos v2_y) (/ PI 180))))
* [exit]simplify:  Simplified to (* (sqrt (sqrt (/ (acos v2_y) (/ PI 180)))) (sqrt (/ (acos v2_y) (/ PI 180))))
* * * * [misc]progress:  [ 32 / 74 ] simplifiying candidate #<alt-delta (λ (v2_y) (- 180 (* 1 (* (sqrt (/ (* (acos v2_y) 180) PI)) (sqrt (/ (* (acos v2_y) 180) PI))))))>
* [enter]simplify:  Simplifying (* (sqrt (/ (* (acos v2_y) 180) PI)) (sqrt (/ (* (acos v2_y) 180) PI)))
* * [misc]simplify:  iters left: 6 (8 enodes)
* * [misc]simplify:  iters left: 5 (11 enodes)
* * [misc]simplify:  iters left: 4 (14 enodes)
* * [misc]simplify:  iters left: 3 (17 enodes)
* * [misc]simplify:  iters left: 2 (19 enodes)
* * [misc]simplify:  iters left: 1 (20 enodes)
* [exit]simplify:  Simplified to (* (/ 180 PI) (acos v2_y))
* [exit]simplify:  Simplified to (* (/ 180 PI) (acos v2_y))
* * * * [misc]progress:  [ 33 / 74 ] simplifiying candidate #<alt-delta (λ (v2_y) (- 180 (/ (* (sqrt (/ (* (acos v2_y) 180) PI)) (sqrt (* (acos v2_y) 180))) (sqrt PI))))>
* [enter]simplify:  Simplifying (* (sqrt (/ (* (acos v2_y) 180) PI)) (sqrt (* (acos v2_y) 180)))
* * [misc]simplify:  iters left: 6 (9 enodes)
* * [misc]simplify:  iters left: 5 (13 enodes)
* * [misc]simplify:  iters left: 4 (15 enodes)
* * [misc]simplify:  iters left: 3 (18 enodes)
* * [misc]simplify:  iters left: 2 (20 enodes)
* * [misc]simplify:  iters left: 1 (21 enodes)
* [exit]simplify:  Simplified to (* (sqrt (* 180 (acos v2_y))) (sqrt (/ (acos v2_y) (/ PI 180))))
* [exit]simplify:  Simplified to (* (sqrt (* 180 (acos v2_y))) (sqrt (/ (acos v2_y) (/ PI 180))))
* * * * [misc]progress:  [ 34 / 74 ] simplifiying candidate #<alt-delta (λ (v2_y) (- 180 (/ (* (sqrt (* (acos v2_y) 180)) (sqrt (/ (* (acos v2_y) 180) PI))) (sqrt PI))))>
* [enter]simplify:  Simplifying (* (sqrt (* (acos v2_y) 180)) (sqrt (/ (* (acos v2_y) 180) PI)))
* * [misc]simplify:  iters left: 6 (9 enodes)
* * [misc]simplify:  iters left: 5 (13 enodes)
* * [misc]simplify:  iters left: 4 (15 enodes)
* * [misc]simplify:  iters left: 3 (18 enodes)
* * [misc]simplify:  iters left: 2 (20 enodes)
* * [misc]simplify:  iters left: 1 (21 enodes)
* [exit]simplify:  Simplified to (* (sqrt (/ (acos v2_y) (/ PI 180))) (sqrt (* 180 (acos v2_y))))
* [exit]simplify:  Simplified to (* (sqrt (/ (acos v2_y) (/ PI 180))) (sqrt (* 180 (acos v2_y))))
* * * * [misc]progress:  [ 35 / 74 ] simplifiying candidate #<alt-delta (λ (v2_y) (- 180 (* (sqrt (/ (* (acos v2_y) 180) PI)) (sqrt (/ (* (acos v2_y) 180) PI)))))>
* * * * [misc]progress:  [ 36 / 74 ] simplifiying candidate #<alt-delta (λ (v2_y) (- 180 (* (sqrt (/ (* (acos v2_y) 180) PI)) (sqrt (/ (* (- (/ PI 2) (asin v2_y)) 180) PI)))))>
* [enter]simplify:  Simplifying (/ PI 2)
* * [misc]simplify:  iters left: 2 (3 enodes)
* [exit]simplify:  Simplified to (/ PI 2)
* [exit]simplify:  Simplified to (/ PI 2)
* [enter]simplify:  Simplifying (asin v2_y)
* * [misc]simplify:  iters left: 1 (2 enodes)
* [exit]simplify:  Simplified to (asin v2_y)
* [exit]simplify:  Simplified to (asin v2_y)
* * * * [misc]progress:  [ 37 / 74 ] simplifiying candidate #<alt-delta (λ (v2_y) (- 180 (* (sqrt (/ (* (acos v2_y) 180) PI)) (sqrt (/ (* (pow (acos v2_y) 1) 180) PI)))))>
* * * * [misc]progress:  [ 38 / 74 ] simplifiying candidate #<alt-delta (λ (v2_y) (- 180 (* (sqrt (/ (* (acos v2_y) 180) PI)) (sqrt (/ (* (exp (log (acos v2_y))) 180) PI)))))>
* [enter]simplify:  Simplifying (log (acos v2_y))
* * [misc]simplify:  iters left: 2 (3 enodes)
* [exit]simplify:  Simplified to (log (acos v2_y))
* [exit]simplify:  Simplified to (log (acos v2_y))
* * * * [misc]progress:  [ 39 / 74 ] simplifiying candidate #<alt-delta (λ (v2_y) (- 180 (* (sqrt (/ (* (acos v2_y) 180) PI)) (sqrt (/ (* (log (exp (acos v2_y))) 180) PI)))))>
* [enter]simplify:  Simplifying (exp (acos v2_y))
* * [misc]simplify:  iters left: 2 (3 enodes)
* [exit]simplify:  Simplified to (exp (acos v2_y))
* [exit]simplify:  Simplified to (exp (acos v2_y))
* * * * [misc]progress:  [ 40 / 74 ] simplifiying candidate #<alt-delta (λ (v2_y) (- 180 (* (sqrt (/ (* (acos v2_y) 180) PI)) (sqrt (/ (* (* (* (cbrt (acos v2_y)) (cbrt (acos v2_y))) (cbrt (acos v2_y))) 180) PI)))))>
* [enter]simplify:  Simplifying (* (cbrt (acos v2_y)) (cbrt (acos v2_y)))
* * [misc]simplify:  iters left: 4 (4 enodes)
* [exit]simplify:  Simplified to (* (cbrt (acos v2_y)) (cbrt (acos v2_y)))
* [exit]simplify:  Simplified to (* (cbrt (acos v2_y)) (cbrt (acos v2_y)))
* [enter]simplify:  Simplifying (cbrt (acos v2_y))
* * [misc]simplify:  iters left: 2 (3 enodes)
* [exit]simplify:  Simplified to (cbrt (acos v2_y))
* [exit]simplify:  Simplified to (cbrt (acos v2_y))
* * * * [misc]progress:  [ 41 / 74 ] simplifiying candidate #<alt-delta (λ (v2_y) (- 180 (* (sqrt (/ (* (acos v2_y) 180) PI)) (sqrt (/ (* (cbrt (* (* (acos v2_y) (acos v2_y)) (acos v2_y))) 180) PI)))))>
* [enter]simplify:  Simplifying (* (* (acos v2_y) (acos v2_y)) (acos v2_y))
* * [misc]simplify:  iters left: 5 (4 enodes)
* * [misc]simplify:  iters left: 4 (5 enodes)
* * [misc]simplify:  iters left: 3 (7 enodes)
* [exit]simplify:  Simplified to (pow (acos v2_y) 3)
* [exit]simplify:  Simplified to (pow (acos v2_y) 3)
* * * * [misc]progress:  [ 42 / 74 ] simplifiying candidate #<alt-delta (λ (v2_y) (- 180 (* (sqrt (/ (* (acos v2_y) 180) PI)) (sqrt (/ (* (* (sqrt (acos v2_y)) (sqrt (acos v2_y))) 180) PI)))))>
* [enter]simplify:  Simplifying (sqrt (acos v2_y))
* * [misc]simplify:  iters left: 2 (3 enodes)
* [exit]simplify:  Simplified to (sqrt (acos v2_y))
* [exit]simplify:  Simplified to (sqrt (acos v2_y))
* [enter]simplify:  Simplifying (sqrt (acos v2_y))
* * [misc]simplify:  iters left: 2 (3 enodes)
* [exit]simplify:  Simplified to (sqrt (acos v2_y))
* [exit]simplify:  Simplified to (sqrt (acos v2_y))
* * * * [misc]progress:  [ 43 / 74 ] simplifiying candidate #<alt-delta (λ (v2_y) (- 180 (* (sqrt (/ (* (acos v2_y) 180) PI)) (sqrt (/ (* (* 1 (acos v2_y)) 180) PI)))))>
* * * * [misc]progress:  [ 44 / 74 ] simplifiying candidate #<alt-delta (λ (v2_y) (- 180 (* (sqrt (/ (* (- (/ PI 2) (asin v2_y)) 180) PI)) (sqrt (/ (* (acos v2_y) 180) PI)))))>
* [enter]simplify:  Simplifying (/ PI 2)
* * [misc]simplify:  iters left: 2 (3 enodes)
* [exit]simplify:  Simplified to (/ PI 2)
* [exit]simplify:  Simplified to (/ PI 2)
* [enter]simplify:  Simplifying (asin v2_y)
* * [misc]simplify:  iters left: 1 (2 enodes)
* [exit]simplify:  Simplified to (asin v2_y)
* [exit]simplify:  Simplified to (asin v2_y)
* * * * [misc]progress:  [ 45 / 74 ] simplifiying candidate #<alt-delta (λ (v2_y) (- 180 (* (sqrt (/ (* (pow (acos v2_y) 1) 180) PI)) (sqrt (/ (* (acos v2_y) 180) PI)))))>
* * * * [misc]progress:  [ 46 / 74 ] simplifiying candidate #<alt-delta (λ (v2_y) (- 180 (* (sqrt (/ (* (exp (log (acos v2_y))) 180) PI)) (sqrt (/ (* (acos v2_y) 180) PI)))))>
* [enter]simplify:  Simplifying (log (acos v2_y))
* * [misc]simplify:  iters left: 2 (3 enodes)
* [exit]simplify:  Simplified to (log (acos v2_y))
* [exit]simplify:  Simplified to (log (acos v2_y))
* * * * [misc]progress:  [ 47 / 74 ] simplifiying candidate #<alt-delta (λ (v2_y) (- 180 (* (sqrt (/ (* (log (exp (acos v2_y))) 180) PI)) (sqrt (/ (* (acos v2_y) 180) PI)))))>
* [enter]simplify:  Simplifying (exp (acos v2_y))
* * [misc]simplify:  iters left: 2 (3 enodes)
* [exit]simplify:  Simplified to (exp (acos v2_y))
* [exit]simplify:  Simplified to (exp (acos v2_y))
* * * * [misc]progress:  [ 48 / 74 ] simplifiying candidate #<alt-delta (λ (v2_y) (- 180 (* (sqrt (/ (* (* (* (cbrt (acos v2_y)) (cbrt (acos v2_y))) (cbrt (acos v2_y))) 180) PI)) (sqrt (/ (* (acos v2_y) 180) PI)))))>
* [enter]simplify:  Simplifying (* (cbrt (acos v2_y)) (cbrt (acos v2_y)))
* * [misc]simplify:  iters left: 4 (4 enodes)
* [exit]simplify:  Simplified to (* (cbrt (acos v2_y)) (cbrt (acos v2_y)))
* [exit]simplify:  Simplified to (* (cbrt (acos v2_y)) (cbrt (acos v2_y)))
* [enter]simplify:  Simplifying (cbrt (acos v2_y))
* * [misc]simplify:  iters left: 2 (3 enodes)
* [exit]simplify:  Simplified to (cbrt (acos v2_y))
* [exit]simplify:  Simplified to (cbrt (acos v2_y))
* * * * [misc]progress:  [ 49 / 74 ] simplifiying candidate #<alt-delta (λ (v2_y) (- 180 (* (sqrt (/ (* (cbrt (* (* (acos v2_y) (acos v2_y)) (acos v2_y))) 180) PI)) (sqrt (/ (* (acos v2_y) 180) PI)))))>
* [enter]simplify:  Simplifying (* (* (acos v2_y) (acos v2_y)) (acos v2_y))
* * [misc]simplify:  iters left: 5 (4 enodes)
* * [misc]simplify:  iters left: 4 (5 enodes)
* * [misc]simplify:  iters left: 3 (7 enodes)
* [exit]simplify:  Simplified to (pow (acos v2_y) 3)
* [exit]simplify:  Simplified to (pow (acos v2_y) 3)
* * * * [misc]progress:  [ 50 / 74 ] simplifiying candidate #<alt-delta (λ (v2_y) (- 180 (* (sqrt (/ (* (* (sqrt (acos v2_y)) (sqrt (acos v2_y))) 180) PI)) (sqrt (/ (* (acos v2_y) 180) PI)))))>
* [enter]simplify:  Simplifying (sqrt (acos v2_y))
* * [misc]simplify:  iters left: 2 (3 enodes)
* [exit]simplify:  Simplified to (sqrt (acos v2_y))
* [exit]simplify:  Simplified to (sqrt (acos v2_y))
* [enter]simplify:  Simplifying (sqrt (acos v2_y))
* * [misc]simplify:  iters left: 2 (3 enodes)
* [exit]simplify:  Simplified to (sqrt (acos v2_y))
* [exit]simplify:  Simplified to (sqrt (acos v2_y))
* * * * [misc]progress:  [ 51 / 74 ] simplifiying candidate #<alt-delta (λ (v2_y) (- 180 (* (sqrt (/ (* (* 1 (acos v2_y)) 180) PI)) (sqrt (/ (* (acos v2_y) 180) PI)))))>
* * * * [misc]progress:  [ 52 / 74 ] simplifiying candidate #<alt-delta (λ (v2_y) (- 180 (* (sqrt (/ (* (acos v2_y) 180) PI)) (sqrt (pow (/ (* (acos v2_y) 180) PI) 1)))))>
* * * * [misc]progress:  [ 53 / 74 ] simplifiying candidate #<alt-delta (λ (v2_y) (- 180 (* (sqrt (/ (* (acos v2_y) 180) PI)) (sqrt (exp (log (/ (* (acos v2_y) 180) PI)))))))>
* [enter]simplify:  Simplifying (log (/ (* (acos v2_y) 180) PI))
* * [misc]simplify:  iters left: 6 (7 enodes)
* * [misc]simplify:  iters left: 5 (13 enodes)
* * [misc]simplify:  iters left: 4 (21 enodes)
* * [misc]simplify:  iters left: 3 (37 enodes)
* * [misc]simplify:  iters left: 2 (49 enodes)
* * [misc]simplify:  iters left: 1 (56 enodes)
* [exit]simplify:  Simplified to (log (/ (acos v2_y) (/ PI 180)))
* [exit]simplify:  Simplified to (log (/ (acos v2_y) (/ PI 180)))
* * * * [misc]progress:  [ 54 / 74 ] simplifiying candidate #<alt-delta (λ (v2_y) (- 180 (* (sqrt (/ (* (acos v2_y) 180) PI)) (sqrt (log (exp (/ (* (acos v2_y) 180) PI)))))))>
* [enter]simplify:  Simplifying (exp (/ (* (acos v2_y) 180) PI))
* * [misc]simplify:  iters left: 6 (7 enodes)
* * [misc]simplify:  iters left: 5 (10 enodes)
* * [misc]simplify:  iters left: 4 (12 enodes)
* * [misc]simplify:  iters left: 3 (17 enodes)
* * [misc]simplify:  iters left: 2 (19 enodes)
* * [misc]simplify:  iters left: 1 (20 enodes)
* [exit]simplify:  Simplified to (exp (/ (acos v2_y) (/ PI 180)))
* [exit]simplify:  Simplified to (exp (/ (acos v2_y) (/ PI 180)))
* * * * [misc]progress:  [ 55 / 74 ] simplifiying candidate #<alt-delta (λ (v2_y) (- 180 (* (sqrt (/ (* (acos v2_y) 180) PI)) (sqrt (* (* (cbrt (/ (* (acos v2_y) 180) PI)) (cbrt (/ (* (acos v2_y) 180) PI))) (cbrt (/ (* (acos v2_y) 180) PI)))))))>
* [enter]simplify:  Simplifying (* (cbrt (/ (* (acos v2_y) 180) PI)) (cbrt (/ (* (acos v2_y) 180) PI)))
* * [misc]simplify:  iters left: 6 (8 enodes)
* * [misc]simplify:  iters left: 5 (11 enodes)
* * [misc]simplify:  iters left: 4 (13 enodes)
* * [misc]simplify:  iters left: 3 (16 enodes)
* * [misc]simplify:  iters left: 2 (18 enodes)
* * [misc]simplify:  iters left: 1 (19 enodes)
* [exit]simplify:  Simplified to (* (cbrt (* (/ 180 PI) (acos v2_y))) (cbrt (* (/ 180 PI) (acos v2_y))))
* [exit]simplify:  Simplified to (* (cbrt (* (/ 180 PI) (acos v2_y))) (cbrt (* (/ 180 PI) (acos v2_y))))
* [enter]simplify:  Simplifying (cbrt (/ (* (acos v2_y) 180) PI))
* * [misc]simplify:  iters left: 6 (7 enodes)
* * [misc]simplify:  iters left: 5 (10 enodes)
* * [misc]simplify:  iters left: 4 (12 enodes)
* * [misc]simplify:  iters left: 3 (15 enodes)
* * [misc]simplify:  iters left: 2 (17 enodes)
* * [misc]simplify:  iters left: 1 (18 enodes)
* [exit]simplify:  Simplified to (cbrt (/ (acos v2_y) (/ PI 180)))
* [exit]simplify:  Simplified to (cbrt (/ (acos v2_y) (/ PI 180)))
* * * * [misc]progress:  [ 56 / 74 ] simplifiying candidate #<alt-delta (λ (v2_y) (- 180 (* (sqrt (/ (* (acos v2_y) 180) PI)) (sqrt (cbrt (* (* (/ (* (acos v2_y) 180) PI) (/ (* (acos v2_y) 180) PI)) (/ (* (acos v2_y) 180) PI)))))))>
* [enter]simplify:  Simplifying (* (* (/ (* (acos v2_y) 180) PI) (/ (* (acos v2_y) 180) PI)) (/ (* (acos v2_y) 180) PI))
* * [misc]simplify:  iters left: 6 (8 enodes)
* * [misc]simplify:  iters left: 5 (18 enodes)
* * [misc]simplify:  iters left: 4 (59 enodes)
* * [misc]simplify:  iters left: 3 (191 enodes)
* [exit]simplify:  Simplified to (pow (* (/ 180 PI) (acos v2_y)) 3)
* [exit]simplify:  Simplified to (pow (* (/ 180 PI) (acos v2_y)) 3)
* * * * [misc]progress:  [ 57 / 74 ] simplifiying candidate #<alt-delta (λ (v2_y) (- 180 (* (sqrt (/ (* (acos v2_y) 180) PI)) (sqrt (* (sqrt (/ (* (acos v2_y) 180) PI)) (sqrt (/ (* (acos v2_y) 180) PI)))))))>
* [enter]simplify:  Simplifying (sqrt (/ (* (acos v2_y) 180) PI))
* * [misc]simplify:  iters left: 6 (7 enodes)
* * [misc]simplify:  iters left: 5 (10 enodes)
* * [misc]simplify:  iters left: 4 (12 enodes)
* * [misc]simplify:  iters left: 3 (15 enodes)
* * [misc]simplify:  iters left: 2 (17 enodes)
* * [misc]simplify:  iters left: 1 (18 enodes)
* [exit]simplify:  Simplified to (sqrt (/ (acos v2_y) (/ PI 180)))
* [exit]simplify:  Simplified to (sqrt (/ (acos v2_y) (/ PI 180)))
* [enter]simplify:  Simplifying (sqrt (/ (* (acos v2_y) 180) PI))
* * [misc]simplify:  iters left: 6 (7 enodes)
* * [misc]simplify:  iters left: 5 (10 enodes)
* * [misc]simplify:  iters left: 4 (12 enodes)
* * [misc]simplify:  iters left: 3 (15 enodes)
* * [misc]simplify:  iters left: 2 (17 enodes)
* * [misc]simplify:  iters left: 1 (18 enodes)
* [exit]simplify:  Simplified to (sqrt (/ (acos v2_y) (/ PI 180)))
* [exit]simplify:  Simplified to (sqrt (/ (acos v2_y) (/ PI 180)))
* * * * [misc]progress:  [ 58 / 74 ] simplifiying candidate #<alt-delta (λ (v2_y) (- 180 (* (sqrt (/ (* (acos v2_y) 180) PI)) (sqrt (/ (- (* (acos v2_y) 180)) (- PI))))))>
* [enter]simplify:  Simplifying (- (* (acos v2_y) 180))
* * [misc]simplify:  iters left: 5 (5 enodes)
* * [misc]simplify:  iters left: 4 (10 enodes)
* * [misc]simplify:  iters left: 3 (12 enodes)
* [exit]simplify:  Simplified to (* (- 180) (acos v2_y))
* [exit]simplify:  Simplified to (* (- 180) (acos v2_y))
* [enter]simplify:  Simplifying (- PI)
* * [misc]simplify:  iters left: 2 (2 enodes)
* [exit]simplify:  Simplified to (- PI)
* [exit]simplify:  Simplified to (- PI)
* * * * [misc]progress:  [ 59 / 74 ] simplifiying candidate #<alt-delta (λ (v2_y) (- 180 (* (sqrt (/ (* (acos v2_y) 180) PI)) (sqrt (* 1 (/ (* (acos v2_y) 180) PI))))))>
* * * * [misc]progress:  [ 60 / 74 ] simplifiying candidate #<alt-delta (λ (v2_y) (- 180 (* (sqrt (/ (* (acos v2_y) 180) PI)) (sqrt (* (* (acos v2_y) 180) (/ 1 PI))))))>
* [enter]simplify:  Simplifying (/ 1 PI)
* * [misc]simplify:  iters left: 2 (3 enodes)
* * [misc]simplify:  iters left: 1 (5 enodes)
* [exit]simplify:  Simplified to (/ 1 PI)
* [exit]simplify:  Simplified to (/ 1 PI)
* * * * [misc]progress:  [ 61 / 74 ] simplifiying candidate #<alt-delta (λ (v2_y) (- 180 (* (sqrt (/ (* (acos v2_y) 180) PI)) (sqrt (/ 1 (/ PI (* (acos v2_y) 180)))))))>
* [enter]simplify:  Simplifying (/ PI (* (acos v2_y) 180))
* * [misc]simplify:  iters left: 5 (6 enodes)
* * [misc]simplify:  iters left: 4 (9 enodes)
* [exit]simplify:  Simplified to (/ (/ PI (acos v2_y)) 180)
* [exit]simplify:  Simplified to (/ (/ PI (acos v2_y)) 180)
* * * * [misc]progress:  [ 62 / 74 ] simplifiying candidate #<alt-delta (λ (v2_y) (- 180 (* (sqrt (/ (* (acos v2_y) 180) PI)) (sqrt (/ (acos v2_y) (/ PI 180))))))>
* [enter]simplify:  Simplifying (/ PI 180)
* * [misc]simplify:  iters left: 2 (3 enodes)
* [exit]simplify:  Simplified to (/ PI 180)
* [exit]simplify:  Simplified to (/ PI 180)
* * * * [misc]progress:  [ 63 / 74 ] simplifiying candidate #<alt-event (λ (v2_y) (- 180 (/ (* (pow (sqrt 180) 2) (acos v2_y)) PI)))>
* [enter]simplify:  Simplifying (- 180 (/ (* (pow (sqrt 180) 2) (acos v2_y)) PI))
* * [misc]simplify:  iters left: 6 (10 enodes)
* * [misc]simplify:  iters left: 5 (16 enodes)
* * [misc]simplify:  iters left: 4 (23 enodes)
* * [misc]simplify:  iters left: 3 (39 enodes)
* * [misc]simplify:  iters left: 2 (61 enodes)
* * [misc]simplify:  iters left: 1 (85 enodes)
* [exit]simplify:  Simplified to (- 180 (/ (acos v2_y) (/ PI 180)))
* * * * [misc]progress:  [ 64 / 74 ] simplifiying candidate #<alt-event (λ (v2_y) (- 180 (/ (* (pow (sqrt 180) 2) (acos v2_y)) PI)))>
* [enter]simplify:  Simplifying (- 180 (/ (* (pow (sqrt 180) 2) (acos v2_y)) PI))
* * [misc]simplify:  iters left: 6 (10 enodes)
* * [misc]simplify:  iters left: 5 (16 enodes)
* * [misc]simplify:  iters left: 4 (23 enodes)
* * [misc]simplify:  iters left: 3 (39 enodes)
* * [misc]simplify:  iters left: 2 (61 enodes)
* * [misc]simplify:  iters left: 1 (85 enodes)
* [exit]simplify:  Simplified to (- 180 (/ (acos v2_y) (/ PI 180)))
* * * * [misc]progress:  [ 65 / 74 ] simplifiying candidate #<alt-event (λ (v2_y) (- 180 (/ (* (pow (sqrt 180) 2) (acos v2_y)) PI)))>
* [enter]simplify:  Simplifying (- 180 (/ (* (pow (sqrt 180) 2) (acos v2_y)) PI))
* * [misc]simplify:  iters left: 6 (10 enodes)
* * [misc]simplify:  iters left: 5 (16 enodes)
* * [misc]simplify:  iters left: 4 (23 enodes)
* * [misc]simplify:  iters left: 3 (39 enodes)
* * [misc]simplify:  iters left: 2 (61 enodes)
* * [misc]simplify:  iters left: 1 (85 enodes)
* [exit]simplify:  Simplified to (- 180 (/ (acos v2_y) (/ PI 180)))
* * * * [misc]progress:  [ 66 / 74 ] simplifiying candidate #<alt-event (λ (v2_y) (- 180 (* (sqrt (/ (* (acos v2_y) 180) PI)) (sqrt (/ (* (acos v2_y) 180) PI)))))>
* [enter]simplify:  Simplifying (- 180 (* (sqrt (/ (* (acos v2_y) 180) PI)) (sqrt (/ (* (acos v2_y) 180) PI))))
* * [misc]simplify:  iters left: 6 (9 enodes)
* * [misc]simplify:  iters left: 5 (14 enodes)
* * [misc]simplify:  iters left: 4 (25 enodes)
* * [misc]simplify:  iters left: 3 (38 enodes)
* * [misc]simplify:  iters left: 2 (50 enodes)
* * [misc]simplify:  iters left: 1 (60 enodes)
* [exit]simplify:  Simplified to (- 180 (* (acos v2_y) (/ 180 PI)))
* * * * [misc]progress:  [ 67 / 74 ] simplifiying candidate #<alt-event (λ (v2_y) (- 180 (* (sqrt (/ (* (acos v2_y) 180) PI)) (sqrt (/ (* (acos v2_y) 180) PI)))))>
* [enter]simplify:  Simplifying (- 180 (* (sqrt (/ (* (acos v2_y) 180) PI)) (sqrt (/ (* (acos v2_y) 180) PI))))
* * [misc]simplify:  iters left: 6 (9 enodes)
* * [misc]simplify:  iters left: 5 (14 enodes)
* * [misc]simplify:  iters left: 4 (25 enodes)
* * [misc]simplify:  iters left: 3 (38 enodes)
* * [misc]simplify:  iters left: 2 (50 enodes)
* * [misc]simplify:  iters left: 1 (60 enodes)
* [exit]simplify:  Simplified to (- 180 (* (acos v2_y) (/ 180 PI)))
* * * * [misc]progress:  [ 68 / 74 ] simplifiying candidate #<alt-event (λ (v2_y) (- 180 (* (sqrt (/ (* (acos v2_y) 180) PI)) (sqrt (/ (* (acos v2_y) 180) PI)))))>
* [enter]simplify:  Simplifying (- 180 (* (sqrt (/ (* (acos v2_y) 180) PI)) (sqrt (/ (* (acos v2_y) 180) PI))))
* * [misc]simplify:  iters left: 6 (9 enodes)
* * [misc]simplify:  iters left: 5 (14 enodes)
* * [misc]simplify:  iters left: 4 (25 enodes)
* * [misc]simplify:  iters left: 3 (38 enodes)
* * [misc]simplify:  iters left: 2 (50 enodes)
* * [misc]simplify:  iters left: 1 (60 enodes)
* [exit]simplify:  Simplified to (- 180 (* (acos v2_y) (/ 180 PI)))
* * * * [misc]progress:  [ 69 / 74 ] simplifiying candidate #<alt-event (λ (v2_y) (- 180 (* (sqrt (/ (* (acos v2_y) 180) PI)) (sqrt (/ (* (acos v2_y) 180) PI)))))>
* [enter]simplify:  Simplifying (- 180 (* (sqrt (/ (* (acos v2_y) 180) PI)) (sqrt (/ (* (acos v2_y) 180) PI))))
* * [misc]simplify:  iters left: 6 (9 enodes)
* * [misc]simplify:  iters left: 5 (14 enodes)
* * [misc]simplify:  iters left: 4 (25 enodes)
* * [misc]simplify:  iters left: 3 (38 enodes)
* * [misc]simplify:  iters left: 2 (50 enodes)
* * [misc]simplify:  iters left: 1 (60 enodes)
* [exit]simplify:  Simplified to (- 180 (* (acos v2_y) (/ 180 PI)))
* * * * [misc]progress:  [ 70 / 74 ] simplifiying candidate #<alt-event (λ (v2_y) (- 180 (* (sqrt (/ (* (acos v2_y) 180) PI)) (sqrt (/ (* (acos v2_y) 180) PI)))))>
* [enter]simplify:  Simplifying (- 180 (* (sqrt (/ (* (acos v2_y) 180) PI)) (sqrt (/ (* (acos v2_y) 180) PI))))
* * [misc]simplify:  iters left: 6 (9 enodes)
* * [misc]simplify:  iters left: 5 (14 enodes)
* * [misc]simplify:  iters left: 4 (25 enodes)
* * [misc]simplify:  iters left: 3 (38 enodes)
* * [misc]simplify:  iters left: 2 (50 enodes)
* * [misc]simplify:  iters left: 1 (60 enodes)
* [exit]simplify:  Simplified to (- 180 (* (acos v2_y) (/ 180 PI)))
* * * * [misc]progress:  [ 71 / 74 ] simplifiying candidate #<alt-event (λ (v2_y) (- 180 (* (sqrt (/ (* (acos v2_y) 180) PI)) (sqrt (/ (* (acos v2_y) 180) PI)))))>
* [enter]simplify:  Simplifying (- 180 (* (sqrt (/ (* (acos v2_y) 180) PI)) (sqrt (/ (* (acos v2_y) 180) PI))))
* * [misc]simplify:  iters left: 6 (9 enodes)
* * [misc]simplify:  iters left: 5 (14 enodes)
* * [misc]simplify:  iters left: 4 (25 enodes)
* * [misc]simplify:  iters left: 3 (38 enodes)
* * [misc]simplify:  iters left: 2 (50 enodes)
* * [misc]simplify:  iters left: 1 (60 enodes)
* [exit]simplify:  Simplified to (- 180 (* (acos v2_y) (/ 180 PI)))
* * * * [misc]progress:  [ 72 / 74 ] simplifiying candidate #<alt-event (λ (v2_y) (- 180 (* (sqrt (/ (* (acos v2_y) 180) PI)) (sqrt (* 180 (/ (acos v2_y) PI))))))>
* [enter]simplify:  Simplifying (- 180 (* (sqrt (/ (* (acos v2_y) 180) PI)) (sqrt (* 180 (/ (acos v2_y) PI)))))
* * [misc]simplify:  iters left: 6 (12 enodes)
* * [misc]simplify:  iters left: 5 (20 enodes)
* * [misc]simplify:  iters left: 4 (27 enodes)
* * [misc]simplify:  iters left: 3 (39 enodes)
* * [misc]simplify:  iters left: 2 (51 enodes)
* * [misc]simplify:  iters left: 1 (62 enodes)
* [exit]simplify:  Simplified to (- 180 (/ (acos v2_y) (/ PI 180)))
* * * * [misc]progress:  [ 73 / 74 ] simplifiying candidate #<alt-event (λ (v2_y) (- 180 (* (sqrt (/ (* (acos v2_y) 180) PI)) (sqrt (* 180 (/ (acos v2_y) PI))))))>
* [enter]simplify:  Simplifying (- 180 (* (sqrt (/ (* (acos v2_y) 180) PI)) (sqrt (* 180 (/ (acos v2_y) PI)))))
* * [misc]simplify:  iters left: 6 (12 enodes)
* * [misc]simplify:  iters left: 5 (20 enodes)
* * [misc]simplify:  iters left: 4 (27 enodes)
* * [misc]simplify:  iters left: 3 (39 enodes)
* * [misc]simplify:  iters left: 2 (51 enodes)
* * [misc]simplify:  iters left: 1 (62 enodes)
* [exit]simplify:  Simplified to (- 180 (/ (acos v2_y) (/ PI 180)))
* * * * [misc]progress:  [ 74 / 74 ] simplifiying candidate #<alt-event (λ (v2_y) (- 180 (* (sqrt (/ (* (acos v2_y) 180) PI)) (sqrt (* 180 (/ (acos v2_y) PI))))))>
* [enter]simplify:  Simplifying (- 180 (* (sqrt (/ (* (acos v2_y) 180) PI)) (sqrt (* 180 (/ (acos v2_y) PI)))))
* * [misc]simplify:  iters left: 6 (12 enodes)
* * [misc]simplify:  iters left: 5 (20 enodes)
* * [misc]simplify:  iters left: 4 (27 enodes)
* * [misc]simplify:  iters left: 3 (39 enodes)
* * [misc]simplify:  iters left: 2 (51 enodes)
* * [misc]simplify:  iters left: 1 (62 enodes)
* [exit]simplify:  Simplified to (- 180 (/ (acos v2_y) (/ PI 180)))
* * * [misc]progress:  adding candidates to table
* * [misc]progress:  iteration 3 / 4
* * * [misc]progress:  picking best candidate
* * * * [misc]pick:  Picked  #<alt-delta (λ (v2_y) (- 180 (exp (log (/ (* (acos v2_y) 180) PI)))))>
* * * [misc]progress:  localizing error
* * * [misc]progress:  generating rewritten candidates
* * * * [misc]progress:  [ 1 / 4 ] rewriting at (2 2)
* * * * [misc]progress:  [ 2 / 4 ] rewriting at (2 2 1 1 1 1)
* * * * [misc]progress:  [ 3 / 4 ] rewriting at (2 2 1 1)
* * * * [misc]progress:  [ 4 / 4 ] rewriting at (2 2 1 1 1)
* * * [misc]progress:  generating series expansions
* * * * [misc]progress:  [ 1 / 4 ] generating series at (2 2)
* [misc]approximate:  Taking taylor expansion of (exp (log (/ (* (acos v2_y) 180) PI))) in (v2_y) around 0
* [misc]taylor:  Taking taylor expansion of (exp (log (/ (* (acos v2_y) 180) PI))) in v2_y
* [misc]taylor:  Taking taylor expansion of (log (/ (* (acos v2_y) 180) PI)) in v2_y
* [misc]taylor:  Taking taylor expansion of (/ (* (acos v2_y) 180) PI) in v2_y
* [misc]taylor:  Taking taylor expansion of (* (acos v2_y) 180) in v2_y
* [misc]taylor:  Taking taylor expansion of (acos v2_y) in v2_y
* [misc]backup-simplify:  Simplify (acos v2_y) into (acos v2_y)
* [misc]taylor:  Taking taylor expansion of 180 in v2_y
* [misc]backup-simplify:  Simplify 180 into 180
* [misc]taylor:  Taking taylor expansion of PI in v2_y
* [misc]backup-simplify:  Simplify PI into PI
* [misc]backup-simplify:  Simplify (* (acos v2_y) 180) into (* 180 (acos v2_y))
* [misc]backup-simplify:  Simplify (/ (* 180 (acos v2_y)) PI) into (* 180 (/ (acos v2_y) PI))
* [misc]backup-simplify:  Simplify (log (* 180 (/ (acos v2_y) PI))) into (log (* 180 (/ (acos v2_y) PI)))
* [misc]backup-simplify:  Simplify (exp (log (* 180 (/ (acos v2_y) PI)))) into (* 180 (/ (acos v2_y) PI))
* [misc]taylor:  Taking taylor expansion of (exp (log (/ (* (acos v2_y) 180) PI))) in v2_y
* [misc]taylor:  Taking taylor expansion of (log (/ (* (acos v2_y) 180) PI)) in v2_y
* [misc]taylor:  Taking taylor expansion of (/ (* (acos v2_y) 180) PI) in v2_y
* [misc]taylor:  Taking taylor expansion of (* (acos v2_y) 180) in v2_y
* [misc]taylor:  Taking taylor expansion of (acos v2_y) in v2_y
* [misc]backup-simplify:  Simplify (acos v2_y) into (acos v2_y)
* [misc]taylor:  Taking taylor expansion of 180 in v2_y
* [misc]backup-simplify:  Simplify 180 into 180
* [misc]taylor:  Taking taylor expansion of PI in v2_y
* [misc]backup-simplify:  Simplify PI into PI
* [misc]backup-simplify:  Simplify (* (acos v2_y) 180) into (* 180 (acos v2_y))
* [misc]backup-simplify:  Simplify (/ (* 180 (acos v2_y)) PI) into (* 180 (/ (acos v2_y) PI))
* [misc]backup-simplify:  Simplify (log (* 180 (/ (acos v2_y) PI))) into (log (* 180 (/ (acos v2_y) PI)))
* [misc]backup-simplify:  Simplify (exp (log (* 180 (/ (acos v2_y) PI)))) into (* 180 (/ (acos v2_y) PI))
* [misc]backup-simplify:  Simplify (* 180 (/ (acos v2_y) PI)) into (* 180 (/ (acos v2_y) PI))
* [misc]backup-simplify:  Simplify (+ (* (acos v2_y) 0) (* 0 180)) into 0
* [misc]backup-simplify:  Simplify (- (/ 0 PI) (+ (* (* 180 (/ (acos v2_y) PI)) (/ 0 PI)))) into 0
* [misc]backup-simplify:  Simplify (/ (+ (* 1 (/ (* (pow (* 1 0) 1)) (pow (* 180 (/ (acos v2_y) PI)) 1)))) 1) into 0
* [misc]backup-simplify:  Simplify (* (exp (log (* 180 (/ (acos v2_y) PI)))) (+ (* (/ (pow 0 1) 1)))) into 0
* [misc]backup-simplify:  Simplify 0 into 0
* [misc]backup-simplify:  Simplify (+ (* (acos v2_y) 0) (+ (* 0 0) (* 0 180))) into 0
* [misc]backup-simplify:  Simplify (- (/ 0 PI) (+ (* (* 180 (/ (acos v2_y) PI)) (/ 0 PI)) (* 0 (/ 0 PI)))) into 0
* [misc]backup-simplify:  Simplify (/ (+ (* -1 (/ (* (pow (* 1 0) 2)) (pow (* 180 (/ (acos v2_y) PI)) 2))) (* 1 (/ (* 1 (pow (* 2 0) 1)) (pow (* 180 (/ (acos v2_y) PI)) 1)))) 2) into 0
* [misc]backup-simplify:  Simplify (* (exp (log (* 180 (/ (acos v2_y) PI)))) (+ (* (/ (pow 0 2) 2)) (* (/ (pow 0 1) 1)))) into 0
* [misc]backup-simplify:  Simplify 0 into 0
* [misc]backup-simplify:  Simplify (+ (* (acos v2_y) 0) (+ (* 0 0) (+ (* 0 0) (* 0 180)))) into 0
* [misc]backup-simplify:  Simplify (- (/ 0 PI) (+ (* (* 180 (/ (acos v2_y) PI)) (/ 0 PI)) (* 0 (/ 0 PI)) (* 0 (/ 0 PI)))) into 0
* [misc]backup-simplify:  Simplify (/ (+ (* 2 (/ (* (pow (* 1 0) 3)) (pow (* 180 (/ (acos v2_y) PI)) 3))) (* -3 (/ (* (pow (* 1 0) 1) (pow (* 2 0) 1)) (pow (* 180 (/ (acos v2_y) PI)) 2))) (* 1 (/ (* 1 1 (pow (* 6 0) 1)) (pow (* 180 (/ (acos v2_y) PI)) 1)))) 6) into 0
* [misc]backup-simplify:  Simplify (* (exp (log (* 180 (/ (acos v2_y) PI)))) (+ (* (/ (pow 0 3) 6)) (* (/ (pow 0 1) 1) (/ (pow 0 1) 1)) (* (/ (pow 0 1) 1)))) into 0
* [misc]backup-simplify:  Simplify 0 into 0
* [misc]backup-simplify:  Simplify (+ (* (acos v2_y) 0) (+ (* 0 0) (+ (* 0 0) (+ (* 0 0) (* 0 180))))) into 0
* [misc]backup-simplify:  Simplify (- (/ 0 PI) (+ (* (* 180 (/ (acos v2_y) PI)) (/ 0 PI)) (* 0 (/ 0 PI)) (* 0 (/ 0 PI)) (* 0 (/ 0 PI)))) into 0
* [misc]backup-simplify:  Simplify (/ (+ (* -6 (/ (* (pow (* 1 0) 4)) (pow (* 180 (/ (acos v2_y) PI)) 4))) (* 12 (/ (* (pow (* 1 0) 2) (pow (* 2 0) 1)) (pow (* 180 (/ (acos v2_y) PI)) 3))) (* -3 (/ (* 1 (pow (* 2 0) 2)) (pow (* 180 (/ (acos v2_y) PI)) 2))) (* -4 (/ (* (pow (* 1 0) 1) 1 (pow (* 6 0) 1)) (pow (* 180 (/ (acos v2_y) PI)) 2))) (* 1 (/ (* 1 1 1 (pow (* 24 0) 1)) (pow (* 180 (/ (acos v2_y) PI)) 1)))) 24) into 0
* [misc]backup-simplify:  Simplify (* (exp (log (* 180 (/ (acos v2_y) PI)))) (+ (* (/ (pow 0 4) 24)) (* (/ (pow 0 2) 2) (/ (pow 0 1) 1)) (* (/ (pow 0 1) 1) (/ (pow 0 1) 1)) (* (/ (pow 0 2) 2)) (* (/ (pow 0 1) 1)))) into 0
* [misc]backup-simplify:  Simplify 0 into 0
* [misc]backup-simplify:  Simplify (+ (* (acos v2_y) 0) (+ (* 0 0) (+ (* 0 0) (+ (* 0 0) (+ (* 0 0) (* 0 180)))))) into 0
* [misc]backup-simplify:  Simplify (- (/ 0 PI) (+ (* (* 180 (/ (acos v2_y) PI)) (/ 0 PI)) (* 0 (/ 0 PI)) (* 0 (/ 0 PI)) (* 0 (/ 0 PI)) (* 0 (/ 0 PI)))) into 0
* [misc]backup-simplify:  Simplify (/ (+ (* 24 (/ (* (pow (* 1 0) 5)) (pow (* 180 (/ (acos v2_y) PI)) 5))) (* -60 (/ (* (pow (* 1 0) 3) (pow (* 2 0) 1)) (pow (* 180 (/ (acos v2_y) PI)) 4))) (* 30 (/ (* (pow (* 1 0) 1) (pow (* 2 0) 2)) (pow (* 180 (/ (acos v2_y) PI)) 3))) (* 20 (/ (* (pow (* 1 0) 2) 1 (pow (* 6 0) 1)) (pow (* 180 (/ (acos v2_y) PI)) 3))) (* -10 (/ (* 1 (pow (* 2 0) 1) (pow (* 6 0) 1)) (pow (* 180 (/ (acos v2_y) PI)) 2))) (* -5 (/ (* (pow (* 1 0) 1) 1 1 (pow (* 24 0) 1)) (pow (* 180 (/ (acos v2_y) PI)) 2))) (* 1 (/ (* 1 1 1 1 (pow (* 120 0) 1)) (pow (* 180 (/ (acos v2_y) PI)) 1)))) 120) into 0
* [misc]backup-simplify:  Simplify (* (exp (log (* 180 (/ (acos v2_y) PI)))) (+ (* (/ (pow 0 5) 120)) (* (/ (pow 0 3) 6) (/ (pow 0 1) 1)) (* (/ (pow 0 2) 2) (/ (pow 0 1) 1)) (* (/ (pow 0 1) 1) (/ (pow 0 2) 2)) (* (/ (pow 0 1) 1) (/ (pow 0 1) 1)) (* (/ (pow 0 1) 1) (/ (pow 0 1) 1)) (* (/ (pow 0 1) 1)))) into 0
* [misc]backup-simplify:  Simplify 0 into 0
* [misc]backup-simplify:  Simplify (+ (* (acos v2_y) 0) (+ (* 0 0) (+ (* 0 0) (+ (* 0 0) (+ (* 0 0) (+ (* 0 0) (* 0 180))))))) into 0
* [misc]backup-simplify:  Simplify (- (/ 0 PI) (+ (* (* 180 (/ (acos v2_y) PI)) (/ 0 PI)) (* 0 (/ 0 PI)) (* 0 (/ 0 PI)) (* 0 (/ 0 PI)) (* 0 (/ 0 PI)) (* 0 (/ 0 PI)))) into 0
* [misc]backup-simplify:  Simplify (/ (+ (* -120 (/ (* (pow (* 1 0) 6)) (pow (* 180 (/ (acos v2_y) PI)) 6))) (* 360 (/ (* (pow (* 1 0) 4) (pow (* 2 0) 1)) (pow (* 180 (/ (acos v2_y) PI)) 5))) (* -270 (/ (* (pow (* 1 0) 2) (pow (* 2 0) 2)) (pow (* 180 (/ (acos v2_y) PI)) 4))) (* -120 (/ (* (pow (* 1 0) 3) 1 (pow (* 6 0) 1)) (pow (* 180 (/ (acos v2_y) PI)) 4))) (* 30 (/ (* 1 (pow (* 2 0) 3)) (pow (* 180 (/ (acos v2_y) PI)) 3))) (* 120 (/ (* (pow (* 1 0) 1) (pow (* 2 0) 1) (pow (* 6 0) 1)) (pow (* 180 (/ (acos v2_y) PI)) 3))) (* 30 (/ (* (pow (* 1 0) 2) 1 1 (pow (* 24 0) 1)) (pow (* 180 (/ (acos v2_y) PI)) 3))) (* -10 (/ (* 1 1 (pow (* 6 0) 2)) (pow (* 180 (/ (acos v2_y) PI)) 2))) (* -15 (/ (* 1 (pow (* 2 0) 1) 1 (pow (* 24 0) 1)) (pow (* 180 (/ (acos v2_y) PI)) 2))) (* -6 (/ (* (pow (* 1 0) 1) 1 1 1 (pow (* 120 0) 1)) (pow (* 180 (/ (acos v2_y) PI)) 2))) (* 1 (/ (* 1 1 1 1 1 (pow (* 720 0) 1)) (pow (* 180 (/ (acos v2_y) PI)) 1)))) 720) into 0
* [misc]backup-simplify:  Simplify (* (exp (log (* 180 (/ (acos v2_y) PI)))) (+ (* (/ (pow 0 6) 720)) (* (/ (pow 0 4) 24) (/ (pow 0 1) 1)) (* (/ (pow 0 3) 6) (/ (pow 0 1) 1)) (* (/ (pow 0 2) 2) (/ (pow 0 2) 2)) (* (/ (pow 0 2) 2) (/ (pow 0 1) 1)) (* (/ (pow 0 1) 1) (/ (pow 0 1) 1) (/ (pow 0 1) 1)) (* (/ (pow 0 1) 1) (/ (pow 0 1) 1)) (* (/ (pow 0 3) 6)) (* (/ (pow 0 1) 1) (/ (pow 0 1) 1)) (* (/ (pow 0 2) 2)) (* (/ (pow 0 1) 1)))) into 0
* [misc]backup-simplify:  Simplify 0 into 0
* [misc]backup-simplify:  Simplify (* 180 (/ (acos v2_y) PI)) into (* 180 (/ (acos v2_y) PI))
* [misc]approximate:  Taking taylor expansion of (exp (log (/ (* (acos (/ 1 v2_y)) 180) PI))) in (v2_y) around 0
* [misc]taylor:  Taking taylor expansion of (exp (log (/ (* (acos (/ 1 v2_y)) 180) PI))) in v2_y
* [misc]taylor:  Taking taylor expansion of (log (/ (* (acos (/ 1 v2_y)) 180) PI)) in v2_y
* [misc]taylor:  Taking taylor expansion of (/ (* (acos (/ 1 v2_y)) 180) PI) in v2_y
* [misc]taylor:  Taking taylor expansion of (* (acos (/ 1 v2_y)) 180) in v2_y
* [misc]taylor:  Taking taylor expansion of (acos (/ 1 v2_y)) in v2_y
* [misc]backup-simplify:  Simplify (acos (/ 1 v2_y)) into (acos (/ 1 v2_y))
* [misc]taylor:  Taking taylor expansion of 180 in v2_y
* [misc]backup-simplify:  Simplify 180 into 180
* [misc]taylor:  Taking taylor expansion of PI in v2_y
* [misc]backup-simplify:  Simplify PI into PI
* [misc]backup-simplify:  Simplify (* (acos (/ 1 v2_y)) 180) into (* 180 (acos (/ 1 v2_y)))
* [misc]backup-simplify:  Simplify (/ (* 180 (acos (/ 1 v2_y))) PI) into (* 180 (/ (acos (/ 1 v2_y)) PI))
* [misc]backup-simplify:  Simplify (log (* 180 (/ (acos (/ 1 v2_y)) PI))) into (log (* 180 (/ (acos (/ 1 v2_y)) PI)))
* [misc]backup-simplify:  Simplify (exp (log (* 180 (/ (acos (/ 1 v2_y)) PI)))) into (* 180 (/ (acos (/ 1 v2_y)) PI))
* [misc]taylor:  Taking taylor expansion of (exp (log (/ (* (acos (/ 1 v2_y)) 180) PI))) in v2_y
* [misc]taylor:  Taking taylor expansion of (log (/ (* (acos (/ 1 v2_y)) 180) PI)) in v2_y
* [misc]taylor:  Taking taylor expansion of (/ (* (acos (/ 1 v2_y)) 180) PI) in v2_y
* [misc]taylor:  Taking taylor expansion of (* (acos (/ 1 v2_y)) 180) in v2_y
* [misc]taylor:  Taking taylor expansion of (acos (/ 1 v2_y)) in v2_y
* [misc]backup-simplify:  Simplify (acos (/ 1 v2_y)) into (acos (/ 1 v2_y))
* [misc]taylor:  Taking taylor expansion of 180 in v2_y
* [misc]backup-simplify:  Simplify 180 into 180
* [misc]taylor:  Taking taylor expansion of PI in v2_y
* [misc]backup-simplify:  Simplify PI into PI
* [misc]backup-simplify:  Simplify (* (acos (/ 1 v2_y)) 180) into (* 180 (acos (/ 1 v2_y)))
* [misc]backup-simplify:  Simplify (/ (* 180 (acos (/ 1 v2_y))) PI) into (* 180 (/ (acos (/ 1 v2_y)) PI))
* [misc]backup-simplify:  Simplify (log (* 180 (/ (acos (/ 1 v2_y)) PI))) into (log (* 180 (/ (acos (/ 1 v2_y)) PI)))
* [misc]backup-simplify:  Simplify (exp (log (* 180 (/ (acos (/ 1 v2_y)) PI)))) into (* 180 (/ (acos (/ 1 v2_y)) PI))
* [misc]backup-simplify:  Simplify (* 180 (/ (acos (/ 1 v2_y)) PI)) into (* 180 (/ (acos (/ 1 v2_y)) PI))
* [misc]backup-simplify:  Simplify (+ (* (acos (/ 1 v2_y)) 0) (* 0 180)) into 0
* [misc]backup-simplify:  Simplify (- (/ 0 PI) (+ (* (* 180 (/ (acos (/ 1 v2_y)) PI)) (/ 0 PI)))) into 0
* [misc]backup-simplify:  Simplify (/ (+ (* 1 (/ (* (pow (* 1 0) 1)) (pow (* 180 (/ (acos (/ 1 v2_y)) PI)) 1)))) 1) into 0
* [misc]backup-simplify:  Simplify (* (exp (log (* 180 (/ (acos (/ 1 v2_y)) PI)))) (+ (* (/ (pow 0 1) 1)))) into 0
* [misc]backup-simplify:  Simplify 0 into 0
* [misc]backup-simplify:  Simplify (+ (* (acos (/ 1 v2_y)) 0) (+ (* 0 0) (* 0 180))) into 0
* [misc]backup-simplify:  Simplify (- (/ 0 PI) (+ (* (* 180 (/ (acos (/ 1 v2_y)) PI)) (/ 0 PI)) (* 0 (/ 0 PI)))) into 0
* [misc]backup-simplify:  Simplify (/ (+ (* -1 (/ (* (pow (* 1 0) 2)) (pow (* 180 (/ (acos (/ 1 v2_y)) PI)) 2))) (* 1 (/ (* 1 (pow (* 2 0) 1)) (pow (* 180 (/ (acos (/ 1 v2_y)) PI)) 1)))) 2) into 0
* [misc]backup-simplify:  Simplify (* (exp (log (* 180 (/ (acos (/ 1 v2_y)) PI)))) (+ (* (/ (pow 0 2) 2)) (* (/ (pow 0 1) 1)))) into 0
* [misc]backup-simplify:  Simplify 0 into 0
* [misc]backup-simplify:  Simplify (+ (* (acos (/ 1 v2_y)) 0) (+ (* 0 0) (+ (* 0 0) (* 0 180)))) into 0
* [misc]backup-simplify:  Simplify (- (/ 0 PI) (+ (* (* 180 (/ (acos (/ 1 v2_y)) PI)) (/ 0 PI)) (* 0 (/ 0 PI)) (* 0 (/ 0 PI)))) into 0
* [misc]backup-simplify:  Simplify (/ (+ (* 2 (/ (* (pow (* 1 0) 3)) (pow (* 180 (/ (acos (/ 1 v2_y)) PI)) 3))) (* -3 (/ (* (pow (* 1 0) 1) (pow (* 2 0) 1)) (pow (* 180 (/ (acos (/ 1 v2_y)) PI)) 2))) (* 1 (/ (* 1 1 (pow (* 6 0) 1)) (pow (* 180 (/ (acos (/ 1 v2_y)) PI)) 1)))) 6) into 0
* [misc]backup-simplify:  Simplify (* (exp (log (* 180 (/ (acos (/ 1 v2_y)) PI)))) (+ (* (/ (pow 0 3) 6)) (* (/ (pow 0 1) 1) (/ (pow 0 1) 1)) (* (/ (pow 0 1) 1)))) into 0
* [misc]backup-simplify:  Simplify 0 into 0
* [misc]backup-simplify:  Simplify (+ (* (acos (/ 1 v2_y)) 0) (+ (* 0 0) (+ (* 0 0) (+ (* 0 0) (* 0 180))))) into 0
* [misc]backup-simplify:  Simplify (- (/ 0 PI) (+ (* (* 180 (/ (acos (/ 1 v2_y)) PI)) (/ 0 PI)) (* 0 (/ 0 PI)) (* 0 (/ 0 PI)) (* 0 (/ 0 PI)))) into 0
* [misc]backup-simplify:  Simplify (/ (+ (* -6 (/ (* (pow (* 1 0) 4)) (pow (* 180 (/ (acos (/ 1 v2_y)) PI)) 4))) (* 12 (/ (* (pow (* 1 0) 2) (pow (* 2 0) 1)) (pow (* 180 (/ (acos (/ 1 v2_y)) PI)) 3))) (* -3 (/ (* 1 (pow (* 2 0) 2)) (pow (* 180 (/ (acos (/ 1 v2_y)) PI)) 2))) (* -4 (/ (* (pow (* 1 0) 1) 1 (pow (* 6 0) 1)) (pow (* 180 (/ (acos (/ 1 v2_y)) PI)) 2))) (* 1 (/ (* 1 1 1 (pow (* 24 0) 1)) (pow (* 180 (/ (acos (/ 1 v2_y)) PI)) 1)))) 24) into 0
* [misc]backup-simplify:  Simplify (* (exp (log (* 180 (/ (acos (/ 1 v2_y)) PI)))) (+ (* (/ (pow 0 4) 24)) (* (/ (pow 0 2) 2) (/ (pow 0 1) 1)) (* (/ (pow 0 1) 1) (/ (pow 0 1) 1)) (* (/ (pow 0 2) 2)) (* (/ (pow 0 1) 1)))) into 0
* [misc]backup-simplify:  Simplify 0 into 0
* [misc]backup-simplify:  Simplify (+ (* (acos (/ 1 v2_y)) 0) (+ (* 0 0) (+ (* 0 0) (+ (* 0 0) (+ (* 0 0) (* 0 180)))))) into 0
* [misc]backup-simplify:  Simplify (- (/ 0 PI) (+ (* (* 180 (/ (acos (/ 1 v2_y)) PI)) (/ 0 PI)) (* 0 (/ 0 PI)) (* 0 (/ 0 PI)) (* 0 (/ 0 PI)) (* 0 (/ 0 PI)))) into 0
* [misc]backup-simplify:  Simplify (/ (+ (* 24 (/ (* (pow (* 1 0) 5)) (pow (* 180 (/ (acos (/ 1 v2_y)) PI)) 5))) (* -60 (/ (* (pow (* 1 0) 3) (pow (* 2 0) 1)) (pow (* 180 (/ (acos (/ 1 v2_y)) PI)) 4))) (* 30 (/ (* (pow (* 1 0) 1) (pow (* 2 0) 2)) (pow (* 180 (/ (acos (/ 1 v2_y)) PI)) 3))) (* 20 (/ (* (pow (* 1 0) 2) 1 (pow (* 6 0) 1)) (pow (* 180 (/ (acos (/ 1 v2_y)) PI)) 3))) (* -10 (/ (* 1 (pow (* 2 0) 1) (pow (* 6 0) 1)) (pow (* 180 (/ (acos (/ 1 v2_y)) PI)) 2))) (* -5 (/ (* (pow (* 1 0) 1) 1 1 (pow (* 24 0) 1)) (pow (* 180 (/ (acos (/ 1 v2_y)) PI)) 2))) (* 1 (/ (* 1 1 1 1 (pow (* 120 0) 1)) (pow (* 180 (/ (acos (/ 1 v2_y)) PI)) 1)))) 120) into 0
* [misc]backup-simplify:  Simplify (* (exp (log (* 180 (/ (acos (/ 1 v2_y)) PI)))) (+ (* (/ (pow 0 5) 120)) (* (/ (pow 0 3) 6) (/ (pow 0 1) 1)) (* (/ (pow 0 2) 2) (/ (pow 0 1) 1)) (* (/ (pow 0 1) 1) (/ (pow 0 2) 2)) (* (/ (pow 0 1) 1) (/ (pow 0 1) 1)) (* (/ (pow 0 1) 1) (/ (pow 0 1) 1)) (* (/ (pow 0 1) 1)))) into 0
* [misc]backup-simplify:  Simplify 0 into 0
* [misc]backup-simplify:  Simplify (+ (* (acos (/ 1 v2_y)) 0) (+ (* 0 0) (+ (* 0 0) (+ (* 0 0) (+ (* 0 0) (+ (* 0 0) (* 0 180))))))) into 0
* [misc]backup-simplify:  Simplify (- (/ 0 PI) (+ (* (* 180 (/ (acos (/ 1 v2_y)) PI)) (/ 0 PI)) (* 0 (/ 0 PI)) (* 0 (/ 0 PI)) (* 0 (/ 0 PI)) (* 0 (/ 0 PI)) (* 0 (/ 0 PI)))) into 0
* [misc]backup-simplify:  Simplify (/ (+ (* -120 (/ (* (pow (* 1 0) 6)) (pow (* 180 (/ (acos (/ 1 v2_y)) PI)) 6))) (* 360 (/ (* (pow (* 1 0) 4) (pow (* 2 0) 1)) (pow (* 180 (/ (acos (/ 1 v2_y)) PI)) 5))) (* -270 (/ (* (pow (* 1 0) 2) (pow (* 2 0) 2)) (pow (* 180 (/ (acos (/ 1 v2_y)) PI)) 4))) (* -120 (/ (* (pow (* 1 0) 3) 1 (pow (* 6 0) 1)) (pow (* 180 (/ (acos (/ 1 v2_y)) PI)) 4))) (* 30 (/ (* 1 (pow (* 2 0) 3)) (pow (* 180 (/ (acos (/ 1 v2_y)) PI)) 3))) (* 120 (/ (* (pow (* 1 0) 1) (pow (* 2 0) 1) (pow (* 6 0) 1)) (pow (* 180 (/ (acos (/ 1 v2_y)) PI)) 3))) (* 30 (/ (* (pow (* 1 0) 2) 1 1 (pow (* 24 0) 1)) (pow (* 180 (/ (acos (/ 1 v2_y)) PI)) 3))) (* -10 (/ (* 1 1 (pow (* 6 0) 2)) (pow (* 180 (/ (acos (/ 1 v2_y)) PI)) 2))) (* -15 (/ (* 1 (pow (* 2 0) 1) 1 (pow (* 24 0) 1)) (pow (* 180 (/ (acos (/ 1 v2_y)) PI)) 2))) (* -6 (/ (* (pow (* 1 0) 1) 1 1 1 (pow (* 120 0) 1)) (pow (* 180 (/ (acos (/ 1 v2_y)) PI)) 2))) (* 1 (/ (* 1 1 1 1 1 (pow (* 720 0) 1)) (pow (* 180 (/ (acos (/ 1 v2_y)) PI)) 1)))) 720) into 0
* [misc]backup-simplify:  Simplify (* (exp (log (* 180 (/ (acos (/ 1 v2_y)) PI)))) (+ (* (/ (pow 0 6) 720)) (* (/ (pow 0 4) 24) (/ (pow 0 1) 1)) (* (/ (pow 0 3) 6) (/ (pow 0 1) 1)) (* (/ (pow 0 2) 2) (/ (pow 0 2) 2)) (* (/ (pow 0 2) 2) (/ (pow 0 1) 1)) (* (/ (pow 0 1) 1) (/ (pow 0 1) 1) (/ (pow 0 1) 1)) (* (/ (pow 0 1) 1) (/ (pow 0 1) 1)) (* (/ (pow 0 3) 6)) (* (/ (pow 0 1) 1) (/ (pow 0 1) 1)) (* (/ (pow 0 2) 2)) (* (/ (pow 0 1) 1)))) into 0
* [misc]backup-simplify:  Simplify 0 into 0
* [misc]backup-simplify:  Simplify (* 180 (/ (acos (/ 1 (/ 1 v2_y))) PI)) into (* 180 (/ (acos v2_y) PI))
* [misc]approximate:  Taking taylor expansion of (exp (log (/ (* (acos (/ 1 (- v2_y))) 180) PI))) in (v2_y) around 0
* [misc]taylor:  Taking taylor expansion of (exp (log (/ (* (acos (/ 1 (- v2_y))) 180) PI))) in v2_y
* [misc]taylor:  Taking taylor expansion of (log (/ (* (acos (/ 1 (- v2_y))) 180) PI)) in v2_y
* [misc]taylor:  Taking taylor expansion of (/ (* (acos (/ 1 (- v2_y))) 180) PI) in v2_y
* [misc]taylor:  Taking taylor expansion of (* (acos (/ 1 (- v2_y))) 180) in v2_y
* [misc]taylor:  Taking taylor expansion of (acos (/ 1 (- v2_y))) in v2_y
* [misc]backup-simplify:  Simplify (acos (/ 1 (- v2_y))) into (acos (/ -1 v2_y))
* [misc]taylor:  Taking taylor expansion of 180 in v2_y
* [misc]backup-simplify:  Simplify 180 into 180
* [misc]taylor:  Taking taylor expansion of PI in v2_y
* [misc]backup-simplify:  Simplify PI into PI
* [misc]backup-simplify:  Simplify (* (acos (/ -1 v2_y)) 180) into (* 180 (acos (/ -1 v2_y)))
* [misc]backup-simplify:  Simplify (/ (* 180 (acos (/ -1 v2_y))) PI) into (* 180 (/ (acos (/ -1 v2_y)) PI))
* [misc]backup-simplify:  Simplify (log (* 180 (/ (acos (/ -1 v2_y)) PI))) into (log (* 180 (/ (acos (/ -1 v2_y)) PI)))
* [misc]backup-simplify:  Simplify (exp (log (* 180 (/ (acos (/ -1 v2_y)) PI)))) into (* 180 (/ (acos (/ -1 v2_y)) PI))
* [misc]taylor:  Taking taylor expansion of (exp (log (/ (* (acos (/ 1 (- v2_y))) 180) PI))) in v2_y
* [misc]taylor:  Taking taylor expansion of (log (/ (* (acos (/ 1 (- v2_y))) 180) PI)) in v2_y
* [misc]taylor:  Taking taylor expansion of (/ (* (acos (/ 1 (- v2_y))) 180) PI) in v2_y
* [misc]taylor:  Taking taylor expansion of (* (acos (/ 1 (- v2_y))) 180) in v2_y
* [misc]taylor:  Taking taylor expansion of (acos (/ 1 (- v2_y))) in v2_y
* [misc]backup-simplify:  Simplify (acos (/ 1 (- v2_y))) into (acos (/ -1 v2_y))
* [misc]taylor:  Taking taylor expansion of 180 in v2_y
* [misc]backup-simplify:  Simplify 180 into 180
* [misc]taylor:  Taking taylor expansion of PI in v2_y
* [misc]backup-simplify:  Simplify PI into PI
* [misc]backup-simplify:  Simplify (* (acos (/ -1 v2_y)) 180) into (* 180 (acos (/ -1 v2_y)))
* [misc]backup-simplify:  Simplify (/ (* 180 (acos (/ -1 v2_y))) PI) into (* 180 (/ (acos (/ -1 v2_y)) PI))
* [misc]backup-simplify:  Simplify (log (* 180 (/ (acos (/ -1 v2_y)) PI))) into (log (* 180 (/ (acos (/ -1 v2_y)) PI)))
* [misc]backup-simplify:  Simplify (exp (log (* 180 (/ (acos (/ -1 v2_y)) PI)))) into (* 180 (/ (acos (/ -1 v2_y)) PI))
* [misc]backup-simplify:  Simplify (* 180 (/ (acos (/ -1 v2_y)) PI)) into (* 180 (/ (acos (/ -1 v2_y)) PI))
* [misc]backup-simplify:  Simplify (+ (* (acos (/ -1 v2_y)) 0) (* 0 180)) into 0
* [misc]backup-simplify:  Simplify (- (/ 0 PI) (+ (* (* 180 (/ (acos (/ -1 v2_y)) PI)) (/ 0 PI)))) into 0
* [misc]backup-simplify:  Simplify (/ (+ (* 1 (/ (* (pow (* 1 0) 1)) (pow (* 180 (/ (acos (/ -1 v2_y)) PI)) 1)))) 1) into 0
* [misc]backup-simplify:  Simplify (* (exp (log (* 180 (/ (acos (/ -1 v2_y)) PI)))) (+ (* (/ (pow 0 1) 1)))) into 0
* [misc]backup-simplify:  Simplify 0 into 0
* [misc]backup-simplify:  Simplify (+ (* (acos (/ -1 v2_y)) 0) (+ (* 0 0) (* 0 180))) into 0
* [misc]backup-simplify:  Simplify (- (/ 0 PI) (+ (* (* 180 (/ (acos (/ -1 v2_y)) PI)) (/ 0 PI)) (* 0 (/ 0 PI)))) into 0
* [misc]backup-simplify:  Simplify (/ (+ (* -1 (/ (* (pow (* 1 0) 2)) (pow (* 180 (/ (acos (/ -1 v2_y)) PI)) 2))) (* 1 (/ (* 1 (pow (* 2 0) 1)) (pow (* 180 (/ (acos (/ -1 v2_y)) PI)) 1)))) 2) into 0
* [misc]backup-simplify:  Simplify (* (exp (log (* 180 (/ (acos (/ -1 v2_y)) PI)))) (+ (* (/ (pow 0 2) 2)) (* (/ (pow 0 1) 1)))) into 0
* [misc]backup-simplify:  Simplify 0 into 0
* [misc]backup-simplify:  Simplify (+ (* (acos (/ -1 v2_y)) 0) (+ (* 0 0) (+ (* 0 0) (* 0 180)))) into 0
* [misc]backup-simplify:  Simplify (- (/ 0 PI) (+ (* (* 180 (/ (acos (/ -1 v2_y)) PI)) (/ 0 PI)) (* 0 (/ 0 PI)) (* 0 (/ 0 PI)))) into 0
* [misc]backup-simplify:  Simplify (/ (+ (* 2 (/ (* (pow (* 1 0) 3)) (pow (* 180 (/ (acos (/ -1 v2_y)) PI)) 3))) (* -3 (/ (* (pow (* 1 0) 1) (pow (* 2 0) 1)) (pow (* 180 (/ (acos (/ -1 v2_y)) PI)) 2))) (* 1 (/ (* 1 1 (pow (* 6 0) 1)) (pow (* 180 (/ (acos (/ -1 v2_y)) PI)) 1)))) 6) into 0
* [misc]backup-simplify:  Simplify (* (exp (log (* 180 (/ (acos (/ -1 v2_y)) PI)))) (+ (* (/ (pow 0 3) 6)) (* (/ (pow 0 1) 1) (/ (pow 0 1) 1)) (* (/ (pow 0 1) 1)))) into 0
* [misc]backup-simplify:  Simplify 0 into 0
* [misc]backup-simplify:  Simplify (+ (* (acos (/ -1 v2_y)) 0) (+ (* 0 0) (+ (* 0 0) (+ (* 0 0) (* 0 180))))) into 0
* [misc]backup-simplify:  Simplify (- (/ 0 PI) (+ (* (* 180 (/ (acos (/ -1 v2_y)) PI)) (/ 0 PI)) (* 0 (/ 0 PI)) (* 0 (/ 0 PI)) (* 0 (/ 0 PI)))) into 0
* [misc]backup-simplify:  Simplify (/ (+ (* -6 (/ (* (pow (* 1 0) 4)) (pow (* 180 (/ (acos (/ -1 v2_y)) PI)) 4))) (* 12 (/ (* (pow (* 1 0) 2) (pow (* 2 0) 1)) (pow (* 180 (/ (acos (/ -1 v2_y)) PI)) 3))) (* -3 (/ (* 1 (pow (* 2 0) 2)) (pow (* 180 (/ (acos (/ -1 v2_y)) PI)) 2))) (* -4 (/ (* (pow (* 1 0) 1) 1 (pow (* 6 0) 1)) (pow (* 180 (/ (acos (/ -1 v2_y)) PI)) 2))) (* 1 (/ (* 1 1 1 (pow (* 24 0) 1)) (pow (* 180 (/ (acos (/ -1 v2_y)) PI)) 1)))) 24) into 0
* [misc]backup-simplify:  Simplify (* (exp (log (* 180 (/ (acos (/ -1 v2_y)) PI)))) (+ (* (/ (pow 0 4) 24)) (* (/ (pow 0 2) 2) (/ (pow 0 1) 1)) (* (/ (pow 0 1) 1) (/ (pow 0 1) 1)) (* (/ (pow 0 2) 2)) (* (/ (pow 0 1) 1)))) into 0
* [misc]backup-simplify:  Simplify 0 into 0
* [misc]backup-simplify:  Simplify (+ (* (acos (/ -1 v2_y)) 0) (+ (* 0 0) (+ (* 0 0) (+ (* 0 0) (+ (* 0 0) (* 0 180)))))) into 0
* [misc]backup-simplify:  Simplify (- (/ 0 PI) (+ (* (* 180 (/ (acos (/ -1 v2_y)) PI)) (/ 0 PI)) (* 0 (/ 0 PI)) (* 0 (/ 0 PI)) (* 0 (/ 0 PI)) (* 0 (/ 0 PI)))) into 0
* [misc]backup-simplify:  Simplify (/ (+ (* 24 (/ (* (pow (* 1 0) 5)) (pow (* 180 (/ (acos (/ -1 v2_y)) PI)) 5))) (* -60 (/ (* (pow (* 1 0) 3) (pow (* 2 0) 1)) (pow (* 180 (/ (acos (/ -1 v2_y)) PI)) 4))) (* 30 (/ (* (pow (* 1 0) 1) (pow (* 2 0) 2)) (pow (* 180 (/ (acos (/ -1 v2_y)) PI)) 3))) (* 20 (/ (* (pow (* 1 0) 2) 1 (pow (* 6 0) 1)) (pow (* 180 (/ (acos (/ -1 v2_y)) PI)) 3))) (* -10 (/ (* 1 (pow (* 2 0) 1) (pow (* 6 0) 1)) (pow (* 180 (/ (acos (/ -1 v2_y)) PI)) 2))) (* -5 (/ (* (pow (* 1 0) 1) 1 1 (pow (* 24 0) 1)) (pow (* 180 (/ (acos (/ -1 v2_y)) PI)) 2))) (* 1 (/ (* 1 1 1 1 (pow (* 120 0) 1)) (pow (* 180 (/ (acos (/ -1 v2_y)) PI)) 1)))) 120) into 0
* [misc]backup-simplify:  Simplify (* (exp (log (* 180 (/ (acos (/ -1 v2_y)) PI)))) (+ (* (/ (pow 0 5) 120)) (* (/ (pow 0 3) 6) (/ (pow 0 1) 1)) (* (/ (pow 0 2) 2) (/ (pow 0 1) 1)) (* (/ (pow 0 1) 1) (/ (pow 0 2) 2)) (* (/ (pow 0 1) 1) (/ (pow 0 1) 1)) (* (/ (pow 0 1) 1) (/ (pow 0 1) 1)) (* (/ (pow 0 1) 1)))) into 0
* [misc]backup-simplify:  Simplify 0 into 0
* [misc]backup-simplify:  Simplify (+ (* (acos (/ -1 v2_y)) 0) (+ (* 0 0) (+ (* 0 0) (+ (* 0 0) (+ (* 0 0) (+ (* 0 0) (* 0 180))))))) into 0
* [misc]backup-simplify:  Simplify (- (/ 0 PI) (+ (* (* 180 (/ (acos (/ -1 v2_y)) PI)) (/ 0 PI)) (* 0 (/ 0 PI)) (* 0 (/ 0 PI)) (* 0 (/ 0 PI)) (* 0 (/ 0 PI)) (* 0 (/ 0 PI)))) into 0
* [misc]backup-simplify:  Simplify (/ (+ (* -120 (/ (* (pow (* 1 0) 6)) (pow (* 180 (/ (acos (/ -1 v2_y)) PI)) 6))) (* 360 (/ (* (pow (* 1 0) 4) (pow (* 2 0) 1)) (pow (* 180 (/ (acos (/ -1 v2_y)) PI)) 5))) (* -270 (/ (* (pow (* 1 0) 2) (pow (* 2 0) 2)) (pow (* 180 (/ (acos (/ -1 v2_y)) PI)) 4))) (* -120 (/ (* (pow (* 1 0) 3) 1 (pow (* 6 0) 1)) (pow (* 180 (/ (acos (/ -1 v2_y)) PI)) 4))) (* 30 (/ (* 1 (pow (* 2 0) 3)) (pow (* 180 (/ (acos (/ -1 v2_y)) PI)) 3))) (* 120 (/ (* (pow (* 1 0) 1) (pow (* 2 0) 1) (pow (* 6 0) 1)) (pow (* 180 (/ (acos (/ -1 v2_y)) PI)) 3))) (* 30 (/ (* (pow (* 1 0) 2) 1 1 (pow (* 24 0) 1)) (pow (* 180 (/ (acos (/ -1 v2_y)) PI)) 3))) (* -10 (/ (* 1 1 (pow (* 6 0) 2)) (pow (* 180 (/ (acos (/ -1 v2_y)) PI)) 2))) (* -15 (/ (* 1 (pow (* 2 0) 1) 1 (pow (* 24 0) 1)) (pow (* 180 (/ (acos (/ -1 v2_y)) PI)) 2))) (* -6 (/ (* (pow (* 1 0) 1) 1 1 1 (pow (* 120 0) 1)) (pow (* 180 (/ (acos (/ -1 v2_y)) PI)) 2))) (* 1 (/ (* 1 1 1 1 1 (pow (* 720 0) 1)) (pow (* 180 (/ (acos (/ -1 v2_y)) PI)) 1)))) 720) into 0
* [misc]backup-simplify:  Simplify (* (exp (log (* 180 (/ (acos (/ -1 v2_y)) PI)))) (+ (* (/ (pow 0 6) 720)) (* (/ (pow 0 4) 24) (/ (pow 0 1) 1)) (* (/ (pow 0 3) 6) (/ (pow 0 1) 1)) (* (/ (pow 0 2) 2) (/ (pow 0 2) 2)) (* (/ (pow 0 2) 2) (/ (pow 0 1) 1)) (* (/ (pow 0 1) 1) (/ (pow 0 1) 1) (/ (pow 0 1) 1)) (* (/ (pow 0 1) 1) (/ (pow 0 1) 1)) (* (/ (pow 0 3) 6)) (* (/ (pow 0 1) 1) (/ (pow 0 1) 1)) (* (/ (pow 0 2) 2)) (* (/ (pow 0 1) 1)))) into 0
* [misc]backup-simplify:  Simplify 0 into 0
* [misc]backup-simplify:  Simplify (* 180 (/ (acos (/ -1 (/ 1 (- v2_y)))) PI)) into (* 180 (/ (acos v2_y) PI))
* * * * [misc]progress:  [ 2 / 4 ] generating series at (2 2 1 1 1 1)
* [misc]approximate:  Taking taylor expansion of (acos v2_y) in (v2_y) around 0
* [misc]taylor:  Taking taylor expansion of (acos v2_y) in v2_y
* [misc]backup-simplify:  Simplify (acos v2_y) into (acos v2_y)
* [misc]taylor:  Taking taylor expansion of (acos v2_y) in v2_y
* [misc]backup-simplify:  Simplify (acos v2_y) into (acos v2_y)
* [misc]backup-simplify:  Simplify (acos v2_y) into (acos v2_y)
* [misc]backup-simplify:  Simplify 0 into 0
* [misc]backup-simplify:  Simplify 0 into 0
* [misc]backup-simplify:  Simplify 0 into 0
* [misc]backup-simplify:  Simplify 0 into 0
* [misc]backup-simplify:  Simplify 0 into 0
* [misc]backup-simplify:  Simplify 0 into 0
* [misc]backup-simplify:  Simplify (acos v2_y) into (acos v2_y)
* [misc]approximate:  Taking taylor expansion of (acos (/ 1 v2_y)) in (v2_y) around 0
* [misc]taylor:  Taking taylor expansion of (acos (/ 1 v2_y)) in v2_y
* [misc]backup-simplify:  Simplify (acos (/ 1 v2_y)) into (acos (/ 1 v2_y))
* [misc]taylor:  Taking taylor expansion of (acos (/ 1 v2_y)) in v2_y
* [misc]backup-simplify:  Simplify (acos (/ 1 v2_y)) into (acos (/ 1 v2_y))
* [misc]backup-simplify:  Simplify (acos (/ 1 v2_y)) into (acos (/ 1 v2_y))
* [misc]backup-simplify:  Simplify 0 into 0
* [misc]backup-simplify:  Simplify 0 into 0
* [misc]backup-simplify:  Simplify 0 into 0
* [misc]backup-simplify:  Simplify 0 into 0
* [misc]backup-simplify:  Simplify 0 into 0
* [misc]backup-simplify:  Simplify 0 into 0
* [misc]backup-simplify:  Simplify (acos (/ 1 (/ 1 v2_y))) into (acos v2_y)
* [misc]approximate:  Taking taylor expansion of (acos (/ 1 (- v2_y))) in (v2_y) around 0
* [misc]taylor:  Taking taylor expansion of (acos (/ 1 (- v2_y))) in v2_y
* [misc]backup-simplify:  Simplify (acos (/ 1 (- v2_y))) into (acos (/ -1 v2_y))
* [misc]taylor:  Taking taylor expansion of (acos (/ 1 (- v2_y))) in v2_y
* [misc]backup-simplify:  Simplify (acos (/ 1 (- v2_y))) into (acos (/ -1 v2_y))
* [misc]backup-simplify:  Simplify (acos (/ -1 v2_y)) into (acos (/ -1 v2_y))
* [misc]backup-simplify:  Simplify 0 into 0
* [misc]backup-simplify:  Simplify 0 into 0
* [misc]backup-simplify:  Simplify 0 into 0
* [misc]backup-simplify:  Simplify 0 into 0
* [misc]backup-simplify:  Simplify 0 into 0
* [misc]backup-simplify:  Simplify 0 into 0
* [misc]backup-simplify:  Simplify (acos (/ -1 (/ 1 (- v2_y)))) into (acos v2_y)
* * * * [misc]progress:  [ 3 / 4 ] generating series at (2 2 1 1)
* [misc]approximate:  Taking taylor expansion of (/ (* (acos v2_y) 180) PI) in (v2_y) around 0
* [misc]taylor:  Taking taylor expansion of (/ (* (acos v2_y) 180) PI) in v2_y
* [misc]taylor:  Taking taylor expansion of (* (acos v2_y) 180) in v2_y
* [misc]taylor:  Taking taylor expansion of (acos v2_y) in v2_y
* [misc]backup-simplify:  Simplify (acos v2_y) into (acos v2_y)
* [misc]taylor:  Taking taylor expansion of 180 in v2_y
* [misc]backup-simplify:  Simplify 180 into 180
* [misc]taylor:  Taking taylor expansion of PI in v2_y
* [misc]backup-simplify:  Simplify PI into PI
* [misc]backup-simplify:  Simplify (* (acos v2_y) 180) into (* 180 (acos v2_y))
* [misc]backup-simplify:  Simplify (/ (* 180 (acos v2_y)) PI) into (* 180 (/ (acos v2_y) PI))
* [misc]taylor:  Taking taylor expansion of (/ (* (acos v2_y) 180) PI) in v2_y
* [misc]taylor:  Taking taylor expansion of (* (acos v2_y) 180) in v2_y
* [misc]taylor:  Taking taylor expansion of (acos v2_y) in v2_y
* [misc]backup-simplify:  Simplify (acos v2_y) into (acos v2_y)
* [misc]taylor:  Taking taylor expansion of 180 in v2_y
* [misc]backup-simplify:  Simplify 180 into 180
* [misc]taylor:  Taking taylor expansion of PI in v2_y
* [misc]backup-simplify:  Simplify PI into PI
* [misc]backup-simplify:  Simplify (* (acos v2_y) 180) into (* 180 (acos v2_y))
* [misc]backup-simplify:  Simplify (/ (* 180 (acos v2_y)) PI) into (* 180 (/ (acos v2_y) PI))
* [misc]backup-simplify:  Simplify (* 180 (/ (acos v2_y) PI)) into (* 180 (/ (acos v2_y) PI))
* [misc]backup-simplify:  Simplify (+ (* (acos v2_y) 0) (* 0 180)) into 0
* [misc]backup-simplify:  Simplify (- (/ 0 PI) (+ (* (* 180 (/ (acos v2_y) PI)) (/ 0 PI)))) into 0
* [misc]backup-simplify:  Simplify 0 into 0
* [misc]backup-simplify:  Simplify (+ (* (acos v2_y) 0) (+ (* 0 0) (* 0 180))) into 0
* [misc]backup-simplify:  Simplify (- (/ 0 PI) (+ (* (* 180 (/ (acos v2_y) PI)) (/ 0 PI)) (* 0 (/ 0 PI)))) into 0
* [misc]backup-simplify:  Simplify 0 into 0
* [misc]backup-simplify:  Simplify (+ (* (acos v2_y) 0) (+ (* 0 0) (+ (* 0 0) (* 0 180)))) into 0
* [misc]backup-simplify:  Simplify (- (/ 0 PI) (+ (* (* 180 (/ (acos v2_y) PI)) (/ 0 PI)) (* 0 (/ 0 PI)) (* 0 (/ 0 PI)))) into 0
* [misc]backup-simplify:  Simplify 0 into 0
* [misc]backup-simplify:  Simplify (+ (* (acos v2_y) 0) (+ (* 0 0) (+ (* 0 0) (+ (* 0 0) (* 0 180))))) into 0
* [misc]backup-simplify:  Simplify (- (/ 0 PI) (+ (* (* 180 (/ (acos v2_y) PI)) (/ 0 PI)) (* 0 (/ 0 PI)) (* 0 (/ 0 PI)) (* 0 (/ 0 PI)))) into 0
* [misc]backup-simplify:  Simplify 0 into 0
* [misc]backup-simplify:  Simplify (+ (* (acos v2_y) 0) (+ (* 0 0) (+ (* 0 0) (+ (* 0 0) (+ (* 0 0) (* 0 180)))))) into 0
* [misc]backup-simplify:  Simplify (- (/ 0 PI) (+ (* (* 180 (/ (acos v2_y) PI)) (/ 0 PI)) (* 0 (/ 0 PI)) (* 0 (/ 0 PI)) (* 0 (/ 0 PI)) (* 0 (/ 0 PI)))) into 0
* [misc]backup-simplify:  Simplify 0 into 0
* [misc]backup-simplify:  Simplify (+ (* (acos v2_y) 0) (+ (* 0 0) (+ (* 0 0) (+ (* 0 0) (+ (* 0 0) (+ (* 0 0) (* 0 180))))))) into 0
* [misc]backup-simplify:  Simplify (- (/ 0 PI) (+ (* (* 180 (/ (acos v2_y) PI)) (/ 0 PI)) (* 0 (/ 0 PI)) (* 0 (/ 0 PI)) (* 0 (/ 0 PI)) (* 0 (/ 0 PI)) (* 0 (/ 0 PI)))) into 0
* [misc]backup-simplify:  Simplify 0 into 0
* [misc]backup-simplify:  Simplify (* 180 (/ (acos v2_y) PI)) into (* 180 (/ (acos v2_y) PI))
* [misc]approximate:  Taking taylor expansion of (/ (* (acos (/ 1 v2_y)) 180) PI) in (v2_y) around 0
* [misc]taylor:  Taking taylor expansion of (/ (* (acos (/ 1 v2_y)) 180) PI) in v2_y
* [misc]taylor:  Taking taylor expansion of (* (acos (/ 1 v2_y)) 180) in v2_y
* [misc]taylor:  Taking taylor expansion of (acos (/ 1 v2_y)) in v2_y
* [misc]backup-simplify:  Simplify (acos (/ 1 v2_y)) into (acos (/ 1 v2_y))
* [misc]taylor:  Taking taylor expansion of 180 in v2_y
* [misc]backup-simplify:  Simplify 180 into 180
* [misc]taylor:  Taking taylor expansion of PI in v2_y
* [misc]backup-simplify:  Simplify PI into PI
* [misc]backup-simplify:  Simplify (* (acos (/ 1 v2_y)) 180) into (* 180 (acos (/ 1 v2_y)))
* [misc]backup-simplify:  Simplify (/ (* 180 (acos (/ 1 v2_y))) PI) into (* 180 (/ (acos (/ 1 v2_y)) PI))
* [misc]taylor:  Taking taylor expansion of (/ (* (acos (/ 1 v2_y)) 180) PI) in v2_y
* [misc]taylor:  Taking taylor expansion of (* (acos (/ 1 v2_y)) 180) in v2_y
* [misc]taylor:  Taking taylor expansion of (acos (/ 1 v2_y)) in v2_y
* [misc]backup-simplify:  Simplify (acos (/ 1 v2_y)) into (acos (/ 1 v2_y))
* [misc]taylor:  Taking taylor expansion of 180 in v2_y
* [misc]backup-simplify:  Simplify 180 into 180
* [misc]taylor:  Taking taylor expansion of PI in v2_y
* [misc]backup-simplify:  Simplify PI into PI
* [misc]backup-simplify:  Simplify (* (acos (/ 1 v2_y)) 180) into (* 180 (acos (/ 1 v2_y)))
* [misc]backup-simplify:  Simplify (/ (* 180 (acos (/ 1 v2_y))) PI) into (* 180 (/ (acos (/ 1 v2_y)) PI))
* [misc]backup-simplify:  Simplify (* 180 (/ (acos (/ 1 v2_y)) PI)) into (* 180 (/ (acos (/ 1 v2_y)) PI))
* [misc]backup-simplify:  Simplify (+ (* (acos (/ 1 v2_y)) 0) (* 0 180)) into 0
* [misc]backup-simplify:  Simplify (- (/ 0 PI) (+ (* (* 180 (/ (acos (/ 1 v2_y)) PI)) (/ 0 PI)))) into 0
* [misc]backup-simplify:  Simplify 0 into 0
* [misc]backup-simplify:  Simplify (+ (* (acos (/ 1 v2_y)) 0) (+ (* 0 0) (* 0 180))) into 0
* [misc]backup-simplify:  Simplify (- (/ 0 PI) (+ (* (* 180 (/ (acos (/ 1 v2_y)) PI)) (/ 0 PI)) (* 0 (/ 0 PI)))) into 0
* [misc]backup-simplify:  Simplify 0 into 0
* [misc]backup-simplify:  Simplify (+ (* (acos (/ 1 v2_y)) 0) (+ (* 0 0) (+ (* 0 0) (* 0 180)))) into 0
* [misc]backup-simplify:  Simplify (- (/ 0 PI) (+ (* (* 180 (/ (acos (/ 1 v2_y)) PI)) (/ 0 PI)) (* 0 (/ 0 PI)) (* 0 (/ 0 PI)))) into 0
* [misc]backup-simplify:  Simplify 0 into 0
* [misc]backup-simplify:  Simplify (+ (* (acos (/ 1 v2_y)) 0) (+ (* 0 0) (+ (* 0 0) (+ (* 0 0) (* 0 180))))) into 0
* [misc]backup-simplify:  Simplify (- (/ 0 PI) (+ (* (* 180 (/ (acos (/ 1 v2_y)) PI)) (/ 0 PI)) (* 0 (/ 0 PI)) (* 0 (/ 0 PI)) (* 0 (/ 0 PI)))) into 0
* [misc]backup-simplify:  Simplify 0 into 0
* [misc]backup-simplify:  Simplify (+ (* (acos (/ 1 v2_y)) 0) (+ (* 0 0) (+ (* 0 0) (+ (* 0 0) (+ (* 0 0) (* 0 180)))))) into 0
* [misc]backup-simplify:  Simplify (- (/ 0 PI) (+ (* (* 180 (/ (acos (/ 1 v2_y)) PI)) (/ 0 PI)) (* 0 (/ 0 PI)) (* 0 (/ 0 PI)) (* 0 (/ 0 PI)) (* 0 (/ 0 PI)))) into 0
* [misc]backup-simplify:  Simplify 0 into 0
* [misc]backup-simplify:  Simplify (+ (* (acos (/ 1 v2_y)) 0) (+ (* 0 0) (+ (* 0 0) (+ (* 0 0) (+ (* 0 0) (+ (* 0 0) (* 0 180))))))) into 0
* [misc]backup-simplify:  Simplify (- (/ 0 PI) (+ (* (* 180 (/ (acos (/ 1 v2_y)) PI)) (/ 0 PI)) (* 0 (/ 0 PI)) (* 0 (/ 0 PI)) (* 0 (/ 0 PI)) (* 0 (/ 0 PI)) (* 0 (/ 0 PI)))) into 0
* [misc]backup-simplify:  Simplify 0 into 0
* [misc]backup-simplify:  Simplify (* 180 (/ (acos (/ 1 (/ 1 v2_y))) PI)) into (* 180 (/ (acos v2_y) PI))
* [misc]approximate:  Taking taylor expansion of (/ (* (acos (/ 1 (- v2_y))) 180) PI) in (v2_y) around 0
* [misc]taylor:  Taking taylor expansion of (/ (* (acos (/ 1 (- v2_y))) 180) PI) in v2_y
* [misc]taylor:  Taking taylor expansion of (* (acos (/ 1 (- v2_y))) 180) in v2_y
* [misc]taylor:  Taking taylor expansion of (acos (/ 1 (- v2_y))) in v2_y
* [misc]backup-simplify:  Simplify (acos (/ 1 (- v2_y))) into (acos (/ -1 v2_y))
* [misc]taylor:  Taking taylor expansion of 180 in v2_y
* [misc]backup-simplify:  Simplify 180 into 180
* [misc]taylor:  Taking taylor expansion of PI in v2_y
* [misc]backup-simplify:  Simplify PI into PI
* [misc]backup-simplify:  Simplify (* (acos (/ -1 v2_y)) 180) into (* 180 (acos (/ -1 v2_y)))
* [misc]backup-simplify:  Simplify (/ (* 180 (acos (/ -1 v2_y))) PI) into (* 180 (/ (acos (/ -1 v2_y)) PI))
* [misc]taylor:  Taking taylor expansion of (/ (* (acos (/ 1 (- v2_y))) 180) PI) in v2_y
* [misc]taylor:  Taking taylor expansion of (* (acos (/ 1 (- v2_y))) 180) in v2_y
* [misc]taylor:  Taking taylor expansion of (acos (/ 1 (- v2_y))) in v2_y
* [misc]backup-simplify:  Simplify (acos (/ 1 (- v2_y))) into (acos (/ -1 v2_y))
* [misc]taylor:  Taking taylor expansion of 180 in v2_y
* [misc]backup-simplify:  Simplify 180 into 180
* [misc]taylor:  Taking taylor expansion of PI in v2_y
* [misc]backup-simplify:  Simplify PI into PI
* [misc]backup-simplify:  Simplify (* (acos (/ -1 v2_y)) 180) into (* 180 (acos (/ -1 v2_y)))
* [misc]backup-simplify:  Simplify (/ (* 180 (acos (/ -1 v2_y))) PI) into (* 180 (/ (acos (/ -1 v2_y)) PI))
* [misc]backup-simplify:  Simplify (* 180 (/ (acos (/ -1 v2_y)) PI)) into (* 180 (/ (acos (/ -1 v2_y)) PI))
* [misc]backup-simplify:  Simplify (+ (* (acos (/ -1 v2_y)) 0) (* 0 180)) into 0
* [misc]backup-simplify:  Simplify (- (/ 0 PI) (+ (* (* 180 (/ (acos (/ -1 v2_y)) PI)) (/ 0 PI)))) into 0
* [misc]backup-simplify:  Simplify 0 into 0
* [misc]backup-simplify:  Simplify (+ (* (acos (/ -1 v2_y)) 0) (+ (* 0 0) (* 0 180))) into 0
* [misc]backup-simplify:  Simplify (- (/ 0 PI) (+ (* (* 180 (/ (acos (/ -1 v2_y)) PI)) (/ 0 PI)) (* 0 (/ 0 PI)))) into 0
* [misc]backup-simplify:  Simplify 0 into 0
* [misc]backup-simplify:  Simplify (+ (* (acos (/ -1 v2_y)) 0) (+ (* 0 0) (+ (* 0 0) (* 0 180)))) into 0
* [misc]backup-simplify:  Simplify (- (/ 0 PI) (+ (* (* 180 (/ (acos (/ -1 v2_y)) PI)) (/ 0 PI)) (* 0 (/ 0 PI)) (* 0 (/ 0 PI)))) into 0
* [misc]backup-simplify:  Simplify 0 into 0
* [misc]backup-simplify:  Simplify (+ (* (acos (/ -1 v2_y)) 0) (+ (* 0 0) (+ (* 0 0) (+ (* 0 0) (* 0 180))))) into 0
* [misc]backup-simplify:  Simplify (- (/ 0 PI) (+ (* (* 180 (/ (acos (/ -1 v2_y)) PI)) (/ 0 PI)) (* 0 (/ 0 PI)) (* 0 (/ 0 PI)) (* 0 (/ 0 PI)))) into 0
* [misc]backup-simplify:  Simplify 0 into 0
* [misc]backup-simplify:  Simplify (+ (* (acos (/ -1 v2_y)) 0) (+ (* 0 0) (+ (* 0 0) (+ (* 0 0) (+ (* 0 0) (* 0 180)))))) into 0
* [misc]backup-simplify:  Simplify (- (/ 0 PI) (+ (* (* 180 (/ (acos (/ -1 v2_y)) PI)) (/ 0 PI)) (* 0 (/ 0 PI)) (* 0 (/ 0 PI)) (* 0 (/ 0 PI)) (* 0 (/ 0 PI)))) into 0
* [misc]backup-simplify:  Simplify 0 into 0
* [misc]backup-simplify:  Simplify (+ (* (acos (/ -1 v2_y)) 0) (+ (* 0 0) (+ (* 0 0) (+ (* 0 0) (+ (* 0 0) (+ (* 0 0) (* 0 180))))))) into 0
* [misc]backup-simplify:  Simplify (- (/ 0 PI) (+ (* (* 180 (/ (acos (/ -1 v2_y)) PI)) (/ 0 PI)) (* 0 (/ 0 PI)) (* 0 (/ 0 PI)) (* 0 (/ 0 PI)) (* 0 (/ 0 PI)) (* 0 (/ 0 PI)))) into 0
* [misc]backup-simplify:  Simplify 0 into 0
* [misc]backup-simplify:  Simplify (* 180 (/ (acos (/ -1 (/ 1 (- v2_y)))) PI)) into (* 180 (/ (acos v2_y) PI))
* * * * [misc]progress:  [ 4 / 4 ] generating series at (2 2 1 1 1)
* [misc]approximate:  Taking taylor expansion of (* (acos v2_y) 180) in (v2_y) around 0
* [misc]taylor:  Taking taylor expansion of (* (acos v2_y) 180) in v2_y
* [misc]taylor:  Taking taylor expansion of (acos v2_y) in v2_y
* [misc]backup-simplify:  Simplify (acos v2_y) into (acos v2_y)
* [misc]taylor:  Taking taylor expansion of 180 in v2_y
* [misc]backup-simplify:  Simplify 180 into 180
* [misc]taylor:  Taking taylor expansion of (* (acos v2_y) 180) in v2_y
* [misc]taylor:  Taking taylor expansion of (acos v2_y) in v2_y
* [misc]backup-simplify:  Simplify (acos v2_y) into (acos v2_y)
* [misc]taylor:  Taking taylor expansion of 180 in v2_y
* [misc]backup-simplify:  Simplify 180 into 180
* [misc]backup-simplify:  Simplify (* (acos v2_y) 180) into (* 180 (acos v2_y))
* [misc]backup-simplify:  Simplify (* 180 (acos v2_y)) into (* 180 (acos v2_y))
* [misc]backup-simplify:  Simplify (+ (* (acos v2_y) 0) (* 0 180)) into 0
* [misc]backup-simplify:  Simplify 0 into 0
* [misc]backup-simplify:  Simplify (+ (* (acos v2_y) 0) (+ (* 0 0) (* 0 180))) into 0
* [misc]backup-simplify:  Simplify 0 into 0
* [misc]backup-simplify:  Simplify (+ (* (acos v2_y) 0) (+ (* 0 0) (+ (* 0 0) (* 0 180)))) into 0
* [misc]backup-simplify:  Simplify 0 into 0
* [misc]backup-simplify:  Simplify (+ (* (acos v2_y) 0) (+ (* 0 0) (+ (* 0 0) (+ (* 0 0) (* 0 180))))) into 0
* [misc]backup-simplify:  Simplify 0 into 0
* [misc]backup-simplify:  Simplify (+ (* (acos v2_y) 0) (+ (* 0 0) (+ (* 0 0) (+ (* 0 0) (+ (* 0 0) (* 0 180)))))) into 0
* [misc]backup-simplify:  Simplify 0 into 0
* [misc]backup-simplify:  Simplify (+ (* (acos v2_y) 0) (+ (* 0 0) (+ (* 0 0) (+ (* 0 0) (+ (* 0 0) (+ (* 0 0) (* 0 180))))))) into 0
* [misc]backup-simplify:  Simplify 0 into 0
* [misc]backup-simplify:  Simplify (* 180 (acos v2_y)) into (* 180 (acos v2_y))
* [misc]approximate:  Taking taylor expansion of (* (acos (/ 1 v2_y)) 180) in (v2_y) around 0
* [misc]taylor:  Taking taylor expansion of (* (acos (/ 1 v2_y)) 180) in v2_y
* [misc]taylor:  Taking taylor expansion of (acos (/ 1 v2_y)) in v2_y
* [misc]backup-simplify:  Simplify (acos (/ 1 v2_y)) into (acos (/ 1 v2_y))
* [misc]taylor:  Taking taylor expansion of 180 in v2_y
* [misc]backup-simplify:  Simplify 180 into 180
* [misc]taylor:  Taking taylor expansion of (* (acos (/ 1 v2_y)) 180) in v2_y
* [misc]taylor:  Taking taylor expansion of (acos (/ 1 v2_y)) in v2_y
* [misc]backup-simplify:  Simplify (acos (/ 1 v2_y)) into (acos (/ 1 v2_y))
* [misc]taylor:  Taking taylor expansion of 180 in v2_y
* [misc]backup-simplify:  Simplify 180 into 180
* [misc]backup-simplify:  Simplify (* (acos (/ 1 v2_y)) 180) into (* 180 (acos (/ 1 v2_y)))
* [misc]backup-simplify:  Simplify (* 180 (acos (/ 1 v2_y))) into (* 180 (acos (/ 1 v2_y)))
* [misc]backup-simplify:  Simplify (+ (* (acos (/ 1 v2_y)) 0) (* 0 180)) into 0
* [misc]backup-simplify:  Simplify 0 into 0
* [misc]backup-simplify:  Simplify (+ (* (acos (/ 1 v2_y)) 0) (+ (* 0 0) (* 0 180))) into 0
* [misc]backup-simplify:  Simplify 0 into 0
* [misc]backup-simplify:  Simplify (+ (* (acos (/ 1 v2_y)) 0) (+ (* 0 0) (+ (* 0 0) (* 0 180)))) into 0
* [misc]backup-simplify:  Simplify 0 into 0
* [misc]backup-simplify:  Simplify (+ (* (acos (/ 1 v2_y)) 0) (+ (* 0 0) (+ (* 0 0) (+ (* 0 0) (* 0 180))))) into 0
* [misc]backup-simplify:  Simplify 0 into 0
* [misc]backup-simplify:  Simplify (+ (* (acos (/ 1 v2_y)) 0) (+ (* 0 0) (+ (* 0 0) (+ (* 0 0) (+ (* 0 0) (* 0 180)))))) into 0
* [misc]backup-simplify:  Simplify 0 into 0
* [misc]backup-simplify:  Simplify (+ (* (acos (/ 1 v2_y)) 0) (+ (* 0 0) (+ (* 0 0) (+ (* 0 0) (+ (* 0 0) (+ (* 0 0) (* 0 180))))))) into 0
* [misc]backup-simplify:  Simplify 0 into 0
* [misc]backup-simplify:  Simplify (* 180 (acos (/ 1 (/ 1 v2_y)))) into (* 180 (acos v2_y))
* [misc]approximate:  Taking taylor expansion of (* (acos (/ 1 (- v2_y))) 180) in (v2_y) around 0
* [misc]taylor:  Taking taylor expansion of (* (acos (/ 1 (- v2_y))) 180) in v2_y
* [misc]taylor:  Taking taylor expansion of (acos (/ 1 (- v2_y))) in v2_y
* [misc]backup-simplify:  Simplify (acos (/ 1 (- v2_y))) into (acos (/ -1 v2_y))
* [misc]taylor:  Taking taylor expansion of 180 in v2_y
* [misc]backup-simplify:  Simplify 180 into 180
* [misc]taylor:  Taking taylor expansion of (* (acos (/ 1 (- v2_y))) 180) in v2_y
* [misc]taylor:  Taking taylor expansion of (acos (/ 1 (- v2_y))) in v2_y
* [misc]backup-simplify:  Simplify (acos (/ 1 (- v2_y))) into (acos (/ -1 v2_y))
* [misc]taylor:  Taking taylor expansion of 180 in v2_y
* [misc]backup-simplify:  Simplify 180 into 180
* [misc]backup-simplify:  Simplify (* (acos (/ -1 v2_y)) 180) into (* 180 (acos (/ -1 v2_y)))
* [misc]backup-simplify:  Simplify (* 180 (acos (/ -1 v2_y))) into (* 180 (acos (/ -1 v2_y)))
* [misc]backup-simplify:  Simplify (+ (* (acos (/ -1 v2_y)) 0) (* 0 180)) into 0
* [misc]backup-simplify:  Simplify 0 into 0
* [misc]backup-simplify:  Simplify (+ (* (acos (/ -1 v2_y)) 0) (+ (* 0 0) (* 0 180))) into 0
* [misc]backup-simplify:  Simplify 0 into 0
* [misc]backup-simplify:  Simplify (+ (* (acos (/ -1 v2_y)) 0) (+ (* 0 0) (+ (* 0 0) (* 0 180)))) into 0
* [misc]backup-simplify:  Simplify 0 into 0
* [misc]backup-simplify:  Simplify (+ (* (acos (/ -1 v2_y)) 0) (+ (* 0 0) (+ (* 0 0) (+ (* 0 0) (* 0 180))))) into 0
* [misc]backup-simplify:  Simplify 0 into 0
* [misc]backup-simplify:  Simplify (+ (* (acos (/ -1 v2_y)) 0) (+ (* 0 0) (+ (* 0 0) (+ (* 0 0) (+ (* 0 0) (* 0 180)))))) into 0
* [misc]backup-simplify:  Simplify 0 into 0
* [misc]backup-simplify:  Simplify (+ (* (acos (/ -1 v2_y)) 0) (+ (* 0 0) (+ (* 0 0) (+ (* 0 0) (+ (* 0 0) (+ (* 0 0) (* 0 180))))))) into 0
* [misc]backup-simplify:  Simplify 0 into 0
* [misc]backup-simplify:  Simplify (* 180 (acos (/ -1 (/ 1 (- v2_y))))) into (* 180 (acos v2_y))
* * * [misc]progress:  simplifying candidates
* * * * [misc]progress:  [ 1 / 59 ] simplifiying candidate #<alt-delta (λ (v2_y) (- 180 (pow (exp (log (/ (* (acos v2_y) 180) PI))) 1)))>
* * * * [misc]progress:  [ 2 / 59 ] simplifiying candidate #<alt-delta (λ (v2_y) (- 180 (pow (exp 1) (log (/ (* (acos v2_y) 180) PI)))))>
* [enter]simplify:  Simplifying (exp 1)
* * [misc]simplify:  iters left: 1 (2 enodes)
* [exit]simplify:  Simplified to E
* [exit]simplify:  Simplified to E
* * * * [misc]progress:  [ 3 / 59 ] simplifiying candidate #<alt-delta (λ (v2_y) (- 180 (pow (exp (* (cbrt (log (/ (* (acos v2_y) 180) PI))) (cbrt (log (/ (* (acos v2_y) 180) PI))))) (cbrt (log (/ (* (acos v2_y) 180) PI))))))>
* [enter]simplify:  Simplifying (exp (* (cbrt (log (/ (* (acos v2_y) 180) PI))) (cbrt (log (/ (* (acos v2_y) 180) PI)))))
* * [misc]simplify:  iters left: 6 (10 enodes)
* * [misc]simplify:  iters left: 5 (18 enodes)
* * [misc]simplify:  iters left: 4 (26 enodes)
* * [misc]simplify:  iters left: 3 (42 enodes)
* * [misc]simplify:  iters left: 2 (54 enodes)
* * [misc]simplify:  iters left: 1 (61 enodes)
* [exit]simplify:  Simplified to (exp (* (cbrt (log (* (acos v2_y) (/ 180 PI)))) (cbrt (log (* (acos v2_y) (/ 180 PI))))))
* [exit]simplify:  Simplified to (exp (* (cbrt (log (* (acos v2_y) (/ 180 PI)))) (cbrt (log (* (acos v2_y) (/ 180 PI))))))
* * * * [misc]progress:  [ 4 / 59 ] simplifiying candidate #<alt-delta (λ (v2_y) (- 180 (pow (exp (sqrt (log (/ (* (acos v2_y) 180) PI)))) (sqrt (log (/ (* (acos v2_y) 180) PI))))))>
* [enter]simplify:  Simplifying (exp (sqrt (log (/ (* (acos v2_y) 180) PI))))
* * [misc]simplify:  iters left: 6 (9 enodes)
* * [misc]simplify:  iters left: 5 (15 enodes)
* * [misc]simplify:  iters left: 4 (23 enodes)
* * [misc]simplify:  iters left: 3 (39 enodes)
* * [misc]simplify:  iters left: 2 (51 enodes)
* * [misc]simplify:  iters left: 1 (58 enodes)
* [exit]simplify:  Simplified to (exp (sqrt (log (* (/ 180 PI) (acos v2_y)))))
* [exit]simplify:  Simplified to (exp (sqrt (log (* (/ 180 PI) (acos v2_y)))))
* * * * [misc]progress:  [ 5 / 59 ] simplifiying candidate #<alt-delta (λ (v2_y) (- 180 (pow (exp 1) (log (/ (* (acos v2_y) 180) PI)))))>
* [enter]simplify:  Simplifying (exp 1)
* * [misc]simplify:  iters left: 1 (2 enodes)
* [exit]simplify:  Simplified to E
* [exit]simplify:  Simplified to E
* * * * [misc]progress:  [ 6 / 59 ] simplifiying candidate #<alt-delta (λ (v2_y) (- 180 (* (exp (log (* (cbrt (/ (* (acos v2_y) 180) PI)) (cbrt (/ (* (acos v2_y) 180) PI))))) (exp (log (cbrt (/ (* (acos v2_y) 180) PI)))))))>
* [enter]simplify:  Simplifying (exp (log (* (cbrt (/ (* (acos v2_y) 180) PI)) (cbrt (/ (* (acos v2_y) 180) PI)))))
* * [misc]simplify:  iters left: 6 (10 enodes)
* * [misc]simplify:  iters left: 5 (15 enodes)
* * [misc]simplify:  iters left: 4 (19 enodes)
* * [misc]simplify:  iters left: 3 (22 enodes)
* * [misc]simplify:  iters left: 2 (24 enodes)
* * [misc]simplify:  iters left: 1 (25 enodes)
* [exit]simplify:  Simplified to (* (cbrt (* (/ 180 PI) (acos v2_y))) (cbrt (* (/ 180 PI) (acos v2_y))))
* [exit]simplify:  Simplified to (* (cbrt (* (/ 180 PI) (acos v2_y))) (cbrt (* (/ 180 PI) (acos v2_y))))
* [enter]simplify:  Simplifying (exp (log (cbrt (/ (* (acos v2_y) 180) PI))))
* * [misc]simplify:  iters left: 6 (9 enodes)
* * [misc]simplify:  iters left: 5 (12 enodes)
* * [misc]simplify:  iters left: 4 (14 enodes)
* * [misc]simplify:  iters left: 3 (17 enodes)
* * [misc]simplify:  iters left: 2 (19 enodes)
* * [misc]simplify:  iters left: 1 (20 enodes)
* [exit]simplify:  Simplified to (cbrt (/ (acos v2_y) (/ PI 180)))
* [exit]simplify:  Simplified to (cbrt (/ (acos v2_y) (/ PI 180)))
* * * * [misc]progress:  [ 7 / 59 ] simplifiying candidate #<alt-delta (λ (v2_y) (- 180 (* (exp (log (sqrt (/ (* (acos v2_y) 180) PI)))) (exp (log (sqrt (/ (* (acos v2_y) 180) PI)))))))>
* [enter]simplify:  Simplifying (exp (log (sqrt (/ (* (acos v2_y) 180) PI))))
* * [misc]simplify:  iters left: 6 (9 enodes)
* * [misc]simplify:  iters left: 5 (12 enodes)
* * [misc]simplify:  iters left: 4 (14 enodes)
* * [misc]simplify:  iters left: 3 (17 enodes)
* * [misc]simplify:  iters left: 2 (19 enodes)
* * [misc]simplify:  iters left: 1 (20 enodes)
* [exit]simplify:  Simplified to (sqrt (/ (acos v2_y) (/ PI 180)))
* [exit]simplify:  Simplified to (sqrt (/ (acos v2_y) (/ PI 180)))
* [enter]simplify:  Simplifying (exp (log (sqrt (/ (* (acos v2_y) 180) PI))))
* * [misc]simplify:  iters left: 6 (9 enodes)
* * [misc]simplify:  iters left: 5 (12 enodes)
* * [misc]simplify:  iters left: 4 (14 enodes)
* * [misc]simplify:  iters left: 3 (17 enodes)
* * [misc]simplify:  iters left: 2 (19 enodes)
* * [misc]simplify:  iters left: 1 (20 enodes)
* [exit]simplify:  Simplified to (sqrt (/ (acos v2_y) (/ PI 180)))
* [exit]simplify:  Simplified to (sqrt (/ (acos v2_y) (/ PI 180)))
* * * * [misc]progress:  [ 8 / 59 ] simplifiying candidate #<alt-delta (λ (v2_y) (- 180 (* (exp (log 1)) (exp (log (/ (* (acos v2_y) 180) PI))))))>
* [enter]simplify:  Simplifying (exp (log 1))
* * [misc]simplify:  iters left: 2 (3 enodes)
* * [misc]simplify:  iters left: 1 (5 enodes)
* [exit]simplify:  Simplified to 1
* [exit]simplify:  Simplified to 1
* [enter]simplify:  Simplifying (exp (log (/ (* (acos v2_y) 180) PI)))
* * [misc]simplify:  iters left: 6 (8 enodes)
* * [misc]simplify:  iters left: 5 (14 enodes)
* * [misc]simplify:  iters left: 4 (25 enodes)
* * [misc]simplify:  iters left: 3 (47 enodes)
* * [misc]simplify:  iters left: 2 (82 enodes)
* * [misc]simplify:  iters left: 1 (173 enodes)
* [exit]simplify:  Simplified to (* (/ 180 PI) (acos v2_y))
* [exit]simplify:  Simplified to (* (/ 180 PI) (acos v2_y))
* * * * [misc]progress:  [ 9 / 59 ] simplifiying candidate #<alt-delta (λ (v2_y) (- 180 (* (exp (log (* (acos v2_y) 180))) (exp (log (/ 1 PI))))))>
* [enter]simplify:  Simplifying (exp (log (* (acos v2_y) 180)))
* * [misc]simplify:  iters left: 5 (6 enodes)
* * [misc]simplify:  iters left: 4 (10 enodes)
* * [misc]simplify:  iters left: 3 (14 enodes)
* * [misc]simplify:  iters left: 2 (17 enodes)
* [exit]simplify:  Simplified to (* 180 (acos v2_y))
* [exit]simplify:  Simplified to (* 180 (acos v2_y))
* [enter]simplify:  Simplifying (exp (log (/ 1 PI)))
* * [misc]simplify:  iters left: 4 (5 enodes)
* * [misc]simplify:  iters left: 3 (11 enodes)
* * [misc]simplify:  iters left: 2 (16 enodes)
* * [misc]simplify:  iters left: 1 (25 enodes)
* [exit]simplify:  Simplified to (/ 1 PI)
* [exit]simplify:  Simplified to (/ 1 PI)
* * * * [misc]progress:  [ 10 / 59 ] simplifiying candidate #<alt-delta (λ (v2_y) (- 180 (/ (exp (log (* (acos v2_y) 180))) (exp (log PI)))))>
* [enter]simplify:  Simplifying (exp (log (* (acos v2_y) 180)))
* * [misc]simplify:  iters left: 5 (6 enodes)
* * [misc]simplify:  iters left: 4 (10 enodes)
* * [misc]simplify:  iters left: 3 (14 enodes)
* * [misc]simplify:  iters left: 2 (17 enodes)
* [exit]simplify:  Simplified to (* 180 (acos v2_y))
* [exit]simplify:  Simplified to (* 180 (acos v2_y))
* [enter]simplify:  Simplifying (exp (log PI))
* * [misc]simplify:  iters left: 2 (3 enodes)
* [exit]simplify:  Simplified to PI
* [exit]simplify:  Simplified to PI
* * * * [misc]progress:  [ 11 / 59 ] simplifiying candidate #<alt-delta (λ (v2_y) (- 180 (/ (* (acos v2_y) 180) PI)))>
* * * * [misc]progress:  [ 12 / 59 ] simplifiying candidate #<alt-delta (λ (v2_y) (- 180 (exp (log (exp (log (/ (* (acos v2_y) 180) PI)))))))>
* [enter]simplify:  Simplifying (log (exp (log (/ (* (acos v2_y) 180) PI))))
* * [misc]simplify:  iters left: 6 (9 enodes)
* * [misc]simplify:  iters left: 5 (15 enodes)
* * [misc]simplify:  iters left: 4 (28 enodes)
* * [misc]simplify:  iters left: 3 (51 enodes)
* * [misc]simplify:  iters left: 2 (98 enodes)
* * [misc]simplify:  iters left: 1 (197 enodes)
* [exit]simplify:  Simplified to (log (/ (acos v2_y) (/ PI 180)))
* [exit]simplify:  Simplified to (log (/ (acos v2_y) (/ PI 180)))
* * * * [misc]progress:  [ 13 / 59 ] simplifiying candidate #<alt-delta (λ (v2_y) (- 180 (log (exp (exp (log (/ (* (acos v2_y) 180) PI)))))))>
* [enter]simplify:  Simplifying (exp (exp (log (/ (* (acos v2_y) 180) PI))))
* * [misc]simplify:  iters left: 6 (9 enodes)
* * [misc]simplify:  iters left: 5 (15 enodes)
* * [misc]simplify:  iters left: 4 (26 enodes)
* * [misc]simplify:  iters left: 3 (50 enodes)
* * [misc]simplify:  iters left: 2 (87 enodes)
* * [misc]simplify:  iters left: 1 (183 enodes)
* [exit]simplify:  Simplified to (exp (* (acos v2_y) (/ 180 PI)))
* [exit]simplify:  Simplified to (exp (* (acos v2_y) (/ 180 PI)))
* * * * [misc]progress:  [ 14 / 59 ] simplifiying candidate #<alt-delta (λ (v2_y) (- 180 (* (* (cbrt (exp (log (/ (* (acos v2_y) 180) PI)))) (cbrt (exp (log (/ (* (acos v2_y) 180) PI))))) (cbrt (exp (log (/ (* (acos v2_y) 180) PI)))))))>
* [enter]simplify:  Simplifying (* (cbrt (exp (log (/ (* (acos v2_y) 180) PI)))) (cbrt (exp (log (/ (* (acos v2_y) 180) PI)))))
* * [misc]simplify:  iters left: 6 (10 enodes)
* * [misc]simplify:  iters left: 5 (16 enodes)
* * [misc]simplify:  iters left: 4 (27 enodes)
* * [misc]simplify:  iters left: 3 (49 enodes)
* * [misc]simplify:  iters left: 2 (84 enodes)
* * [misc]simplify:  iters left: 1 (170 enodes)
* [exit]simplify:  Simplified to (* (cbrt (/ (acos v2_y) (/ PI 180))) (cbrt (/ (acos v2_y) (/ PI 180))))
* [exit]simplify:  Simplified to (* (cbrt (/ (acos v2_y) (/ PI 180))) (cbrt (/ (acos v2_y) (/ PI 180))))
* [enter]simplify:  Simplifying (cbrt (exp (log (/ (* (acos v2_y) 180) PI))))
* * [misc]simplify:  iters left: 6 (9 enodes)
* * [misc]simplify:  iters left: 5 (15 enodes)
* * [misc]simplify:  iters left: 4 (26 enodes)
* * [misc]simplify:  iters left: 3 (48 enodes)
* * [misc]simplify:  iters left: 2 (92 enodes)
* * [misc]simplify:  iters left: 1 (192 enodes)
* [exit]simplify:  Simplified to (cbrt (/ (acos v2_y) (/ PI 180)))
* [exit]simplify:  Simplified to (cbrt (/ (acos v2_y) (/ PI 180)))
* * * * [misc]progress:  [ 15 / 59 ] simplifiying candidate #<alt-delta (λ (v2_y) (- 180 (cbrt (* (* (exp (log (/ (* (acos v2_y) 180) PI))) (exp (log (/ (* (acos v2_y) 180) PI)))) (exp (log (/ (* (acos v2_y) 180) PI)))))))>
* [enter]simplify:  Simplifying (* (* (exp (log (/ (* (acos v2_y) 180) PI))) (exp (log (/ (* (acos v2_y) 180) PI)))) (exp (log (/ (* (acos v2_y) 180) PI))))
* * [misc]simplify:  iters left: 6 (10 enodes)
* * [misc]simplify:  iters left: 5 (19 enodes)
* * [misc]simplify:  iters left: 4 (56 enodes)
* * [misc]simplify:  iters left: 3 (219 enodes)
* [exit]simplify:  Simplified to (pow (/ (acos v2_y) (/ PI 180)) 3)
* [exit]simplify:  Simplified to (pow (/ (acos v2_y) (/ PI 180)) 3)
* * * * [misc]progress:  [ 16 / 59 ] simplifiying candidate #<alt-delta (λ (v2_y) (- 180 (* (sqrt (exp (log (/ (* (acos v2_y) 180) PI)))) (sqrt (exp (log (/ (* (acos v2_y) 180) PI)))))))>
* [enter]simplify:  Simplifying (sqrt (exp (log (/ (* (acos v2_y) 180) PI))))
* * [misc]simplify:  iters left: 6 (9 enodes)
* * [misc]simplify:  iters left: 5 (15 enodes)
* * [misc]simplify:  iters left: 4 (26 enodes)
* * [misc]simplify:  iters left: 3 (48 enodes)
* * [misc]simplify:  iters left: 2 (92 enodes)
* * [misc]simplify:  iters left: 1 (192 enodes)
* [exit]simplify:  Simplified to (sqrt (/ (acos v2_y) (/ PI 180)))
* [exit]simplify:  Simplified to (sqrt (/ (acos v2_y) (/ PI 180)))
* [enter]simplify:  Simplifying (sqrt (exp (log (/ (* (acos v2_y) 180) PI))))
* * [misc]simplify:  iters left: 6 (9 enodes)
* * [misc]simplify:  iters left: 5 (15 enodes)
* * [misc]simplify:  iters left: 4 (26 enodes)
* * [misc]simplify:  iters left: 3 (48 enodes)
* * [misc]simplify:  iters left: 2 (92 enodes)
* * [misc]simplify:  iters left: 1 (192 enodes)
* [exit]simplify:  Simplified to (sqrt (/ (acos v2_y) (/ PI 180)))
* [exit]simplify:  Simplified to (sqrt (/ (acos v2_y) (/ PI 180)))
* * * * [misc]progress:  [ 17 / 59 ] simplifiying candidate #<alt-delta (λ (v2_y) (- 180 (* 1 (exp (log (/ (* (acos v2_y) 180) PI))))))>
* * * * [misc]progress:  [ 18 / 59 ] simplifiying candidate #<alt-delta (λ (v2_y) (- 180 (exp (log (/ (* (- (/ PI 2) (asin v2_y)) 180) PI)))))>
* [enter]simplify:  Simplifying (/ PI 2)
* * [misc]simplify:  iters left: 2 (3 enodes)
* [exit]simplify:  Simplified to (/ PI 2)
* [exit]simplify:  Simplified to (/ PI 2)
* [enter]simplify:  Simplifying (asin v2_y)
* * [misc]simplify:  iters left: 1 (2 enodes)
* [exit]simplify:  Simplified to (asin v2_y)
* [exit]simplify:  Simplified to (asin v2_y)
* * * * [misc]progress:  [ 19 / 59 ] simplifiying candidate #<alt-delta (λ (v2_y) (- 180 (exp (log (/ (* (pow (acos v2_y) 1) 180) PI)))))>
* * * * [misc]progress:  [ 20 / 59 ] simplifiying candidate #<alt-delta (λ (v2_y) (- 180 (exp (log (/ (* (exp (log (acos v2_y))) 180) PI)))))>
* [enter]simplify:  Simplifying (log (acos v2_y))
* * [misc]simplify:  iters left: 2 (3 enodes)
* [exit]simplify:  Simplified to (log (acos v2_y))
* [exit]simplify:  Simplified to (log (acos v2_y))
* * * * [misc]progress:  [ 21 / 59 ] simplifiying candidate #<alt-delta (λ (v2_y) (- 180 (exp (log (/ (* (log (exp (acos v2_y))) 180) PI)))))>
* [enter]simplify:  Simplifying (exp (acos v2_y))
* * [misc]simplify:  iters left: 2 (3 enodes)
* [exit]simplify:  Simplified to (exp (acos v2_y))
* [exit]simplify:  Simplified to (exp (acos v2_y))
* * * * [misc]progress:  [ 22 / 59 ] simplifiying candidate #<alt-delta (λ (v2_y) (- 180 (exp (log (/ (* (* (* (cbrt (acos v2_y)) (cbrt (acos v2_y))) (cbrt (acos v2_y))) 180) PI)))))>
* [enter]simplify:  Simplifying (* (cbrt (acos v2_y)) (cbrt (acos v2_y)))
* * [misc]simplify:  iters left: 4 (4 enodes)
* [exit]simplify:  Simplified to (* (cbrt (acos v2_y)) (cbrt (acos v2_y)))
* [exit]simplify:  Simplified to (* (cbrt (acos v2_y)) (cbrt (acos v2_y)))
* [enter]simplify:  Simplifying (cbrt (acos v2_y))
* * [misc]simplify:  iters left: 2 (3 enodes)
* [exit]simplify:  Simplified to (cbrt (acos v2_y))
* [exit]simplify:  Simplified to (cbrt (acos v2_y))
* * * * [misc]progress:  [ 23 / 59 ] simplifiying candidate #<alt-delta (λ (v2_y) (- 180 (exp (log (/ (* (cbrt (* (* (acos v2_y) (acos v2_y)) (acos v2_y))) 180) PI)))))>
* [enter]simplify:  Simplifying (* (* (acos v2_y) (acos v2_y)) (acos v2_y))
* * [misc]simplify:  iters left: 5 (4 enodes)
* * [misc]simplify:  iters left: 4 (5 enodes)
* * [misc]simplify:  iters left: 3 (7 enodes)
* [exit]simplify:  Simplified to (pow (acos v2_y) 3)
* [exit]simplify:  Simplified to (pow (acos v2_y) 3)
* * * * [misc]progress:  [ 24 / 59 ] simplifiying candidate #<alt-delta (λ (v2_y) (- 180 (exp (log (/ (* (* (sqrt (acos v2_y)) (sqrt (acos v2_y))) 180) PI)))))>
* [enter]simplify:  Simplifying (sqrt (acos v2_y))
* * [misc]simplify:  iters left: 2 (3 enodes)
* [exit]simplify:  Simplified to (sqrt (acos v2_y))
* [exit]simplify:  Simplified to (sqrt (acos v2_y))
* [enter]simplify:  Simplifying (sqrt (acos v2_y))
* * [misc]simplify:  iters left: 2 (3 enodes)
* [exit]simplify:  Simplified to (sqrt (acos v2_y))
* [exit]simplify:  Simplified to (sqrt (acos v2_y))
* * * * [misc]progress:  [ 25 / 59 ] simplifiying candidate #<alt-delta (λ (v2_y) (- 180 (exp (log (/ (* (* 1 (acos v2_y)) 180) PI)))))>
* * * * [misc]progress:  [ 26 / 59 ] simplifiying candidate #<alt-delta (λ (v2_y) (- 180 (exp (log (pow (/ (* (acos v2_y) 180) PI) 1)))))>
* * * * [misc]progress:  [ 27 / 59 ] simplifiying candidate #<alt-delta (λ (v2_y) (- 180 (exp (log (exp (log (/ (* (acos v2_y) 180) PI)))))))>
* [enter]simplify:  Simplifying (log (/ (* (acos v2_y) 180) PI))
* * [misc]simplify:  iters left: 6 (7 enodes)
* * [misc]simplify:  iters left: 5 (13 enodes)
* * [misc]simplify:  iters left: 4 (21 enodes)
* * [misc]simplify:  iters left: 3 (37 enodes)
* * [misc]simplify:  iters left: 2 (49 enodes)
* * [misc]simplify:  iters left: 1 (56 enodes)
* [exit]simplify:  Simplified to (log (/ (acos v2_y) (/ PI 180)))
* [exit]simplify:  Simplified to (log (/ (acos v2_y) (/ PI 180)))
* * * * [misc]progress:  [ 28 / 59 ] simplifiying candidate #<alt-delta (λ (v2_y) (- 180 (exp (log (log (exp (/ (* (acos v2_y) 180) PI)))))))>
* [enter]simplify:  Simplifying (exp (/ (* (acos v2_y) 180) PI))
* * [misc]simplify:  iters left: 6 (7 enodes)
* * [misc]simplify:  iters left: 5 (10 enodes)
* * [misc]simplify:  iters left: 4 (12 enodes)
* * [misc]simplify:  iters left: 3 (17 enodes)
* * [misc]simplify:  iters left: 2 (19 enodes)
* * [misc]simplify:  iters left: 1 (20 enodes)
* [exit]simplify:  Simplified to (exp (/ (acos v2_y) (/ PI 180)))
* [exit]simplify:  Simplified to (exp (/ (acos v2_y) (/ PI 180)))
* * * * [misc]progress:  [ 29 / 59 ] simplifiying candidate #<alt-delta (λ (v2_y) (- 180 (exp (log (* (* (cbrt (/ (* (acos v2_y) 180) PI)) (cbrt (/ (* (acos v2_y) 180) PI))) (cbrt (/ (* (acos v2_y) 180) PI)))))))>
* [enter]simplify:  Simplifying (* (cbrt (/ (* (acos v2_y) 180) PI)) (cbrt (/ (* (acos v2_y) 180) PI)))
* * [misc]simplify:  iters left: 6 (8 enodes)
* * [misc]simplify:  iters left: 5 (11 enodes)
* * [misc]simplify:  iters left: 4 (13 enodes)
* * [misc]simplify:  iters left: 3 (16 enodes)
* * [misc]simplify:  iters left: 2 (18 enodes)
* * [misc]simplify:  iters left: 1 (19 enodes)
* [exit]simplify:  Simplified to (* (cbrt (* (/ 180 PI) (acos v2_y))) (cbrt (* (/ 180 PI) (acos v2_y))))
* [exit]simplify:  Simplified to (* (cbrt (* (/ 180 PI) (acos v2_y))) (cbrt (* (/ 180 PI) (acos v2_y))))
* [enter]simplify:  Simplifying (cbrt (/ (* (acos v2_y) 180) PI))
* * [misc]simplify:  iters left: 6 (7 enodes)
* * [misc]simplify:  iters left: 5 (10 enodes)
* * [misc]simplify:  iters left: 4 (12 enodes)
* * [misc]simplify:  iters left: 3 (15 enodes)
* * [misc]simplify:  iters left: 2 (17 enodes)
* * [misc]simplify:  iters left: 1 (18 enodes)
* [exit]simplify:  Simplified to (cbrt (/ (acos v2_y) (/ PI 180)))
* [exit]simplify:  Simplified to (cbrt (/ (acos v2_y) (/ PI 180)))
* * * * [misc]progress:  [ 30 / 59 ] simplifiying candidate #<alt-delta (λ (v2_y) (- 180 (exp (log (cbrt (* (* (/ (* (acos v2_y) 180) PI) (/ (* (acos v2_y) 180) PI)) (/ (* (acos v2_y) 180) PI)))))))>
* [enter]simplify:  Simplifying (* (* (/ (* (acos v2_y) 180) PI) (/ (* (acos v2_y) 180) PI)) (/ (* (acos v2_y) 180) PI))
* * [misc]simplify:  iters left: 6 (8 enodes)
* * [misc]simplify:  iters left: 5 (18 enodes)
* * [misc]simplify:  iters left: 4 (59 enodes)
* * [misc]simplify:  iters left: 3 (191 enodes)
* [exit]simplify:  Simplified to (pow (* (/ 180 PI) (acos v2_y)) 3)
* [exit]simplify:  Simplified to (pow (* (/ 180 PI) (acos v2_y)) 3)
* * * * [misc]progress:  [ 31 / 59 ] simplifiying candidate #<alt-delta (λ (v2_y) (- 180 (exp (log (* (sqrt (/ (* (acos v2_y) 180) PI)) (sqrt (/ (* (acos v2_y) 180) PI)))))))>
* [enter]simplify:  Simplifying (sqrt (/ (* (acos v2_y) 180) PI))
* * [misc]simplify:  iters left: 6 (7 enodes)
* * [misc]simplify:  iters left: 5 (10 enodes)
* * [misc]simplify:  iters left: 4 (12 enodes)
* * [misc]simplify:  iters left: 3 (15 enodes)
* * [misc]simplify:  iters left: 2 (17 enodes)
* * [misc]simplify:  iters left: 1 (18 enodes)
* [exit]simplify:  Simplified to (sqrt (/ (acos v2_y) (/ PI 180)))
* [exit]simplify:  Simplified to (sqrt (/ (acos v2_y) (/ PI 180)))
* [enter]simplify:  Simplifying (sqrt (/ (* (acos v2_y) 180) PI))
* * [misc]simplify:  iters left: 6 (7 enodes)
* * [misc]simplify:  iters left: 5 (10 enodes)
* * [misc]simplify:  iters left: 4 (12 enodes)
* * [misc]simplify:  iters left: 3 (15 enodes)
* * [misc]simplify:  iters left: 2 (17 enodes)
* * [misc]simplify:  iters left: 1 (18 enodes)
* [exit]simplify:  Simplified to (sqrt (/ (acos v2_y) (/ PI 180)))
* [exit]simplify:  Simplified to (sqrt (/ (acos v2_y) (/ PI 180)))
* * * * [misc]progress:  [ 32 / 59 ] simplifiying candidate #<alt-delta (λ (v2_y) (- 180 (exp (log (/ (- (* (acos v2_y) 180)) (- PI))))))>
* [enter]simplify:  Simplifying (- (* (acos v2_y) 180))
* * [misc]simplify:  iters left: 5 (5 enodes)
* * [misc]simplify:  iters left: 4 (10 enodes)
* * [misc]simplify:  iters left: 3 (12 enodes)
* [exit]simplify:  Simplified to (* (- 180) (acos v2_y))
* [exit]simplify:  Simplified to (* (- 180) (acos v2_y))
* [enter]simplify:  Simplifying (- PI)
* * [misc]simplify:  iters left: 2 (2 enodes)
* [exit]simplify:  Simplified to (- PI)
* [exit]simplify:  Simplified to (- PI)
* * * * [misc]progress:  [ 33 / 59 ] simplifiying candidate #<alt-delta (λ (v2_y) (- 180 (exp (log (* 1 (/ (* (acos v2_y) 180) PI))))))>
* * * * [misc]progress:  [ 34 / 59 ] simplifiying candidate #<alt-delta (λ (v2_y) (- 180 (exp (log (* (* (acos v2_y) 180) (/ 1 PI))))))>
* [enter]simplify:  Simplifying (/ 1 PI)
* * [misc]simplify:  iters left: 2 (3 enodes)
* * [misc]simplify:  iters left: 1 (5 enodes)
* [exit]simplify:  Simplified to (/ 1 PI)
* [exit]simplify:  Simplified to (/ 1 PI)
* * * * [misc]progress:  [ 35 / 59 ] simplifiying candidate #<alt-delta (λ (v2_y) (- 180 (exp (log (/ 1 (/ PI (* (acos v2_y) 180)))))))>
* [enter]simplify:  Simplifying (/ PI (* (acos v2_y) 180))
* * [misc]simplify:  iters left: 5 (6 enodes)
* * [misc]simplify:  iters left: 4 (9 enodes)
* [exit]simplify:  Simplified to (/ (/ PI (acos v2_y)) 180)
* [exit]simplify:  Simplified to (/ (/ PI (acos v2_y)) 180)
* * * * [misc]progress:  [ 36 / 59 ] simplifiying candidate #<alt-delta (λ (v2_y) (- 180 (exp (log (/ (acos v2_y) (/ PI 180))))))>
* [enter]simplify:  Simplifying (/ PI 180)
* * [misc]simplify:  iters left: 2 (3 enodes)
* [exit]simplify:  Simplified to (/ PI 180)
* [exit]simplify:  Simplified to (/ PI 180)
* * * * [misc]progress:  [ 37 / 59 ] simplifiying candidate #<alt-delta (λ (v2_y) (- 180 (exp (log (/ (pow (* (acos v2_y) 180) 1) PI)))))>
* * * * [misc]progress:  [ 38 / 59 ] simplifiying candidate #<alt-delta (λ (v2_y) (- 180 (exp (log (/ (exp (log (* (acos v2_y) 180))) PI)))))>
* [enter]simplify:  Simplifying (log (* (acos v2_y) 180))
* * [misc]simplify:  iters left: 4 (5 enodes)
* * [misc]simplify:  iters left: 3 (9 enodes)
* * [misc]simplify:  iters left: 2 (10 enodes)
* [exit]simplify:  Simplified to (log (* 180 (acos v2_y)))
* [exit]simplify:  Simplified to (log (* 180 (acos v2_y)))
* * * * [misc]progress:  [ 39 / 59 ] simplifiying candidate #<alt-delta (λ (v2_y) (- 180 (exp (log (/ (log (exp (* (acos v2_y) 180))) PI)))))>
* [enter]simplify:  Simplifying (exp (* (acos v2_y) 180))
* * [misc]simplify:  iters left: 4 (5 enodes)
* * [misc]simplify:  iters left: 3 (8 enodes)
* [exit]simplify:  Simplified to (exp (* 180 (acos v2_y)))
* [exit]simplify:  Simplified to (exp (* 180 (acos v2_y)))
* * * * [misc]progress:  [ 40 / 59 ] simplifiying candidate #<alt-delta (λ (v2_y) (- 180 (exp (log (/ (* (* (cbrt (* (acos v2_y) 180)) (cbrt (* (acos v2_y) 180))) (cbrt (* (acos v2_y) 180))) PI)))))>
* [enter]simplify:  Simplifying (* (cbrt (* (acos v2_y) 180)) (cbrt (* (acos v2_y) 180)))
* * [misc]simplify:  iters left: 6 (6 enodes)
* * [misc]simplify:  iters left: 5 (7 enodes)
* [exit]simplify:  Simplified to (* (cbrt (* 180 (acos v2_y))) (cbrt (* 180 (acos v2_y))))
* [exit]simplify:  Simplified to (* (cbrt (* 180 (acos v2_y))) (cbrt (* 180 (acos v2_y))))
* [enter]simplify:  Simplifying (cbrt (* (acos v2_y) 180))
* * [misc]simplify:  iters left: 4 (5 enodes)
* * [misc]simplify:  iters left: 3 (6 enodes)
* [exit]simplify:  Simplified to (cbrt (* 180 (acos v2_y)))
* [exit]simplify:  Simplified to (cbrt (* 180 (acos v2_y)))
* * * * [misc]progress:  [ 41 / 59 ] simplifiying candidate #<alt-delta (λ (v2_y) (- 180 (exp (log (/ (cbrt (* (* (* (acos v2_y) 180) (* (acos v2_y) 180)) (* (acos v2_y) 180))) PI)))))>
* [enter]simplify:  Simplifying (* (* (* (acos v2_y) 180) (* (acos v2_y) 180)) (* (acos v2_y) 180))
* * [misc]simplify:  iters left: 6 (6 enodes)
* * [misc]simplify:  iters left: 5 (14 enodes)
* * [misc]simplify:  iters left: 4 (30 enodes)
* * [misc]simplify:  iters left: 3 (56 enodes)
* * [misc]simplify:  iters left: 2 (87 enodes)
* * [misc]simplify:  iters left: 1 (90 enodes)
* [exit]simplify:  Simplified to (pow (* 180 (acos v2_y)) 3)
* [exit]simplify:  Simplified to (pow (* 180 (acos v2_y)) 3)
* * * * [misc]progress:  [ 42 / 59 ] simplifiying candidate #<alt-delta (λ (v2_y) (- 180 (exp (log (/ (* (sqrt (* (acos v2_y) 180)) (sqrt (* (acos v2_y) 180))) PI)))))>
* [enter]simplify:  Simplifying (sqrt (* (acos v2_y) 180))
* * [misc]simplify:  iters left: 4 (5 enodes)
* * [misc]simplify:  iters left: 3 (6 enodes)
* [exit]simplify:  Simplified to (sqrt (* 180 (acos v2_y)))
* [exit]simplify:  Simplified to (sqrt (* 180 (acos v2_y)))
* [enter]simplify:  Simplifying (sqrt (* (acos v2_y) 180))
* * [misc]simplify:  iters left: 4 (5 enodes)
* * [misc]simplify:  iters left: 3 (6 enodes)
* [exit]simplify:  Simplified to (sqrt (* 180 (acos v2_y)))
* [exit]simplify:  Simplified to (sqrt (* 180 (acos v2_y)))
* * * * [misc]progress:  [ 43 / 59 ] simplifiying candidate #<alt-delta (λ (v2_y) (- 180 (exp (log (/ (* 1 (* (acos v2_y) 180)) PI)))))>
* * * * [misc]progress:  [ 44 / 59 ] simplifiying candidate #<alt-delta (λ (v2_y) (- 180 (exp (log (/ (* (* (cbrt (acos v2_y)) (cbrt (acos v2_y))) (* (cbrt (acos v2_y)) 180)) PI)))))>
* [enter]simplify:  Simplifying (* (cbrt (acos v2_y)) 180)
* * [misc]simplify:  iters left: 4 (5 enodes)
* * [misc]simplify:  iters left: 3 (6 enodes)
* [exit]simplify:  Simplified to (* (cbrt (acos v2_y)) 180)
* [exit]simplify:  Simplified to (* (cbrt (acos v2_y)) 180)
* * * * [misc]progress:  [ 45 / 59 ] simplifiying candidate #<alt-delta (λ (v2_y) (- 180 (exp (log (/ (* (sqrt (acos v2_y)) (* (sqrt (acos v2_y)) 180)) PI)))))>
* [enter]simplify:  Simplifying (* (sqrt (acos v2_y)) 180)
* * [misc]simplify:  iters left: 4 (5 enodes)
* * [misc]simplify:  iters left: 3 (6 enodes)
* [exit]simplify:  Simplified to (* (sqrt (acos v2_y)) 180)
* [exit]simplify:  Simplified to (* (sqrt (acos v2_y)) 180)
* * * * [misc]progress:  [ 46 / 59 ] simplifiying candidate #<alt-delta (λ (v2_y) (- 180 (exp (log (/ (* 1 (* (acos v2_y) 180)) PI)))))>
* [enter]simplify:  Simplifying (* (acos v2_y) 180)
* * [misc]simplify:  iters left: 3 (4 enodes)
* * [misc]simplify:  iters left: 2 (5 enodes)
* [exit]simplify:  Simplified to (* 180 (acos v2_y))
* [exit]simplify:  Simplified to (* 180 (acos v2_y))
* * * * [misc]progress:  [ 47 / 59 ] simplifiying candidate #<alt-delta (λ (v2_y) (- 180 (exp (log (/ (* 180 (acos v2_y)) PI)))))>
* * * * [misc]progress:  [ 48 / 59 ] simplifiying candidate #<alt-event (λ (v2_y) (- 180 (* 180 (/ (acos v2_y) PI))))>
* [enter]simplify:  Simplifying (- 180 (* 180 (/ (acos v2_y) PI)))
* * [misc]simplify:  iters left: 6 (7 enodes)
* * [misc]simplify:  iters left: 5 (12 enodes)
* * [misc]simplify:  iters left: 4 (25 enodes)
* * [misc]simplify:  iters left: 3 (36 enodes)
* * [misc]simplify:  iters left: 2 (48 enodes)
* * [misc]simplify:  iters left: 1 (61 enodes)
* [exit]simplify:  Simplified to (- 180 (* (/ 180 PI) (acos v2_y)))
* * * * [misc]progress:  [ 49 / 59 ] simplifiying candidate #<alt-event (λ (v2_y) (- 180 (* 180 (/ (acos v2_y) PI))))>
* [enter]simplify:  Simplifying (- 180 (* 180 (/ (acos v2_y) PI)))
* * [misc]simplify:  iters left: 6 (7 enodes)
* * [misc]simplify:  iters left: 5 (12 enodes)
* * [misc]simplify:  iters left: 4 (25 enodes)
* * [misc]simplify:  iters left: 3 (36 enodes)
* * [misc]simplify:  iters left: 2 (48 enodes)
* * [misc]simplify:  iters left: 1 (61 enodes)
* [exit]simplify:  Simplified to (- 180 (* (/ 180 PI) (acos v2_y)))
* * * * [misc]progress:  [ 50 / 59 ] simplifiying candidate #<alt-event (λ (v2_y) (- 180 (* 180 (/ (acos v2_y) PI))))>
* [enter]simplify:  Simplifying (- 180 (* 180 (/ (acos v2_y) PI)))
* * [misc]simplify:  iters left: 6 (7 enodes)
* * [misc]simplify:  iters left: 5 (12 enodes)
* * [misc]simplify:  iters left: 4 (25 enodes)
* * [misc]simplify:  iters left: 3 (36 enodes)
* * [misc]simplify:  iters left: 2 (48 enodes)
* * [misc]simplify:  iters left: 1 (61 enodes)
* [exit]simplify:  Simplified to (- 180 (* (/ 180 PI) (acos v2_y)))
* * * * [misc]progress:  [ 51 / 59 ] simplifiying candidate #<alt-event (λ (v2_y) (- 180 (exp (log (/ (* (acos v2_y) 180) PI)))))>
* [enter]simplify:  Simplifying (- 180 (exp (log (/ (* (acos v2_y) 180) PI))))
* * [misc]simplify:  iters left: 6 (9 enodes)
* * [misc]simplify:  iters left: 5 (17 enodes)
* * [misc]simplify:  iters left: 4 (33 enodes)
* * [misc]simplify:  iters left: 3 (67 enodes)
* * [misc]simplify:  iters left: 2 (143 enodes)
* * [misc]simplify:  iters left: 1 (317 enodes)
* [exit]simplify:  Simplified to (- 180 (/ (acos v2_y) (/ PI 180)))
* * * * [misc]progress:  [ 52 / 59 ] simplifiying candidate #<alt-event (λ (v2_y) (- 180 (exp (log (/ (* (acos v2_y) 180) PI)))))>
* [enter]simplify:  Simplifying (- 180 (exp (log (/ (* (acos v2_y) 180) PI))))
* * [misc]simplify:  iters left: 6 (9 enodes)
* * [misc]simplify:  iters left: 5 (17 enodes)
* * [misc]simplify:  iters left: 4 (33 enodes)
* * [misc]simplify:  iters left: 3 (67 enodes)
* * [misc]simplify:  iters left: 2 (143 enodes)
* * [misc]simplify:  iters left: 1 (317 enodes)
* [exit]simplify:  Simplified to (- 180 (/ (acos v2_y) (/ PI 180)))
* * * * [misc]progress:  [ 53 / 59 ] simplifiying candidate #<alt-event (λ (v2_y) (- 180 (exp (log (/ (* (acos v2_y) 180) PI)))))>
* [enter]simplify:  Simplifying (- 180 (exp (log (/ (* (acos v2_y) 180) PI))))
* * [misc]simplify:  iters left: 6 (9 enodes)
* * [misc]simplify:  iters left: 5 (17 enodes)
* * [misc]simplify:  iters left: 4 (33 enodes)
* * [misc]simplify:  iters left: 3 (67 enodes)
* * [misc]simplify:  iters left: 2 (143 enodes)
* * [misc]simplify:  iters left: 1 (317 enodes)
* [exit]simplify:  Simplified to (- 180 (/ (acos v2_y) (/ PI 180)))
* * * * [misc]progress:  [ 54 / 59 ] simplifiying candidate #<alt-event (λ (v2_y) (- 180 (exp (log (* 180 (/ (acos v2_y) PI))))))>
* [enter]simplify:  Simplifying (- 180 (exp (log (* 180 (/ (acos v2_y) PI)))))
* * [misc]simplify:  iters left: 6 (9 enodes)
* * [misc]simplify:  iters left: 5 (17 enodes)
* * [misc]simplify:  iters left: 4 (39 enodes)
* * [misc]simplify:  iters left: 3 (74 enodes)
* * [misc]simplify:  iters left: 2 (132 enodes)
* * [misc]simplify:  iters left: 1 (268 enodes)
* [exit]simplify:  Simplified to (- 180 (* (/ 180 PI) (acos v2_y)))
* * * * [misc]progress:  [ 55 / 59 ] simplifiying candidate #<alt-event (λ (v2_y) (- 180 (exp (log (* 180 (/ (acos v2_y) PI))))))>
* [enter]simplify:  Simplifying (- 180 (exp (log (* 180 (/ (acos v2_y) PI)))))
* * [misc]simplify:  iters left: 6 (9 enodes)
* * [misc]simplify:  iters left: 5 (17 enodes)
* * [misc]simplify:  iters left: 4 (39 enodes)
* * [misc]simplify:  iters left: 3 (74 enodes)
* * [misc]simplify:  iters left: 2 (132 enodes)
* * [misc]simplify:  iters left: 1 (268 enodes)
* [exit]simplify:  Simplified to (- 180 (* (/ 180 PI) (acos v2_y)))
* * * * [misc]progress:  [ 56 / 59 ] simplifiying candidate #<alt-event (λ (v2_y) (- 180 (exp (log (* 180 (/ (acos v2_y) PI))))))>
* [enter]simplify:  Simplifying (- 180 (exp (log (* 180 (/ (acos v2_y) PI)))))
* * [misc]simplify:  iters left: 6 (9 enodes)
* * [misc]simplify:  iters left: 5 (17 enodes)
* * [misc]simplify:  iters left: 4 (39 enodes)
* * [misc]simplify:  iters left: 3 (74 enodes)
* * [misc]simplify:  iters left: 2 (132 enodes)
* * [misc]simplify:  iters left: 1 (268 enodes)
* [exit]simplify:  Simplified to (- 180 (* (/ 180 PI) (acos v2_y)))
* * * * [misc]progress:  [ 57 / 59 ] simplifiying candidate #<alt-event (λ (v2_y) (- 180 (exp (log (/ (* 180 (acos v2_y)) PI)))))>
* [enter]simplify:  Simplifying (- 180 (exp (log (/ (* 180 (acos v2_y)) PI))))
* * [misc]simplify:  iters left: 6 (9 enodes)
* * [misc]simplify:  iters left: 5 (17 enodes)
* * [misc]simplify:  iters left: 4 (33 enodes)
* * [misc]simplify:  iters left: 3 (67 enodes)
* * [misc]simplify:  iters left: 2 (138 enodes)
* * [misc]simplify:  iters left: 1 (303 enodes)
* [exit]simplify:  Simplified to (- 180 (* (acos v2_y) (/ 180 PI)))
* * * * [misc]progress:  [ 58 / 59 ] simplifiying candidate #<alt-event (λ (v2_y) (- 180 (exp (log (/ (* 180 (acos v2_y)) PI)))))>
* [enter]simplify:  Simplifying (- 180 (exp (log (/ (* 180 (acos v2_y)) PI))))
* * [misc]simplify:  iters left: 6 (9 enodes)
* * [misc]simplify:  iters left: 5 (17 enodes)
* * [misc]simplify:  iters left: 4 (33 enodes)
* * [misc]simplify:  iters left: 3 (67 enodes)
* * [misc]simplify:  iters left: 2 (138 enodes)
* * [misc]simplify:  iters left: 1 (303 enodes)
* [exit]simplify:  Simplified to (- 180 (* (acos v2_y) (/ 180 PI)))
* * * * [misc]progress:  [ 59 / 59 ] simplifiying candidate #<alt-event (λ (v2_y) (- 180 (exp (log (/ (* 180 (acos v2_y)) PI)))))>
* [enter]simplify:  Simplifying (- 180 (exp (log (/ (* 180 (acos v2_y)) PI))))
* * [misc]simplify:  iters left: 6 (9 enodes)
* * [misc]simplify:  iters left: 5 (17 enodes)
* * [misc]simplify:  iters left: 4 (33 enodes)
* * [misc]simplify:  iters left: 3 (67 enodes)
* * [misc]simplify:  iters left: 2 (138 enodes)
* * [misc]simplify:  iters left: 1 (303 enodes)
* [exit]simplify:  Simplified to (- 180 (* (acos v2_y) (/ 180 PI)))
* * * [misc]progress:  adding candidates to table
* * [misc]progress:  iteration 4 / 4
* * * [misc]progress:  picking best candidate
* * * * [misc]pick:  Picked  #<alt-delta (λ (v2_y) (- 180 (* (* (cbrt (/ (* (acos v2_y) 180) PI)) (cbrt (/ (* (acos v2_y) 180) PI))) (cbrt (/ (* (acos v2_y) 180) PI)))))>
* * * [misc]progress:  localizing error
* * * [misc]progress:  generating rewritten candidates
* * * * [misc]progress:  [ 1 / 4 ] rewriting at (2 2 1)
* * * * [misc]progress:  [ 2 / 4 ] rewriting at (2 2 2 1 1 1)
* * * * [misc]progress:  [ 3 / 4 ] rewriting at (2 2 1 2 1 1 1)
* * * * [misc]progress:  [ 4 / 4 ] rewriting at (2 2 1 1 1 1 1)
* * * [misc]progress:  generating series expansions
* * * * [misc]progress:  [ 1 / 4 ] generating series at (2 2 1)
* [misc]approximate:  Taking taylor expansion of (* (cbrt (/ (* (acos v2_y) 180) PI)) (cbrt (/ (* (acos v2_y) 180) PI))) in (v2_y) around 0
* [misc]taylor:  Taking taylor expansion of (* (cbrt (/ (* (acos v2_y) 180) PI)) (cbrt (/ (* (acos v2_y) 180) PI))) in v2_y
* [misc]taylor:  Taking taylor expansion of (cbrt (/ (* (acos v2_y) 180) PI)) in v2_y
* [misc]taylor:  Rewrote expression to (pow (/ (* (acos v2_y) 180) PI) 1/3)
* [misc]taylor:  Taking taylor expansion of (exp (* 1/3 (log (/ (* (acos v2_y) 180) PI)))) in v2_y
* [misc]taylor:  Taking taylor expansion of (* 1/3 (log (/ (* (acos v2_y) 180) PI))) in v2_y
* [misc]taylor:  Taking taylor expansion of 1/3 in v2_y
* [misc]backup-simplify:  Simplify 1/3 into 1/3
* [misc]taylor:  Taking taylor expansion of (log (/ (* (acos v2_y) 180) PI)) in v2_y
* [misc]taylor:  Taking taylor expansion of (/ (* (acos v2_y) 180) PI) in v2_y
* [misc]taylor:  Taking taylor expansion of (* (acos v2_y) 180) in v2_y
* [misc]taylor:  Taking taylor expansion of (acos v2_y) in v2_y
* [misc]backup-simplify:  Simplify (acos v2_y) into (acos v2_y)
* [misc]taylor:  Taking taylor expansion of 180 in v2_y
* [misc]backup-simplify:  Simplify 180 into 180
* [misc]taylor:  Taking taylor expansion of PI in v2_y
* [misc]backup-simplify:  Simplify PI into PI
* [misc]backup-simplify:  Simplify (* (acos v2_y) 180) into (* 180 (acos v2_y))
* [misc]backup-simplify:  Simplify (/ (* 180 (acos v2_y)) PI) into (* 180 (/ (acos v2_y) PI))
* [misc]backup-simplify:  Simplify (log (* 180 (/ (acos v2_y) PI))) into (log (* 180 (/ (acos v2_y) PI)))
* [misc]backup-simplify:  Simplify (* 1/3 (log (* 180 (/ (acos v2_y) PI)))) into (* 1/3 (log (* 180 (/ (acos v2_y) PI))))
* [misc]backup-simplify:  Simplify (exp (* 1/3 (log (* 180 (/ (acos v2_y) PI))))) into (pow (* 180 (/ (acos v2_y) PI)) 1/3)
* [misc]taylor:  Taking taylor expansion of (cbrt (/ (* (acos v2_y) 180) PI)) in v2_y
* [misc]taylor:  Rewrote expression to (pow (/ (* (acos v2_y) 180) PI) 1/3)
* [misc]taylor:  Taking taylor expansion of (exp (* 1/3 (log (/ (* (acos v2_y) 180) PI)))) in v2_y
* [misc]taylor:  Taking taylor expansion of (* 1/3 (log (/ (* (acos v2_y) 180) PI))) in v2_y
* [misc]taylor:  Taking taylor expansion of 1/3 in v2_y
* [misc]backup-simplify:  Simplify 1/3 into 1/3
* [misc]taylor:  Taking taylor expansion of (log (/ (* (acos v2_y) 180) PI)) in v2_y
* [misc]taylor:  Taking taylor expansion of (/ (* (acos v2_y) 180) PI) in v2_y
* [misc]taylor:  Taking taylor expansion of (* (acos v2_y) 180) in v2_y
* [misc]taylor:  Taking taylor expansion of (acos v2_y) in v2_y
* [misc]backup-simplify:  Simplify (acos v2_y) into (acos v2_y)
* [misc]taylor:  Taking taylor expansion of 180 in v2_y
* [misc]backup-simplify:  Simplify 180 into 180
* [misc]taylor:  Taking taylor expansion of PI in v2_y
* [misc]backup-simplify:  Simplify PI into PI
* [misc]backup-simplify:  Simplify (* (acos v2_y) 180) into (* 180 (acos v2_y))
* [misc]backup-simplify:  Simplify (/ (* 180 (acos v2_y)) PI) into (* 180 (/ (acos v2_y) PI))
* [misc]backup-simplify:  Simplify (log (* 180 (/ (acos v2_y) PI))) into (log (* 180 (/ (acos v2_y) PI)))
* [misc]backup-simplify:  Simplify (* 1/3 (log (* 180 (/ (acos v2_y) PI)))) into (* 1/3 (log (* 180 (/ (acos v2_y) PI))))
* [misc]backup-simplify:  Simplify (exp (* 1/3 (log (* 180 (/ (acos v2_y) PI))))) into (pow (* 180 (/ (acos v2_y) PI)) 1/3)
* [misc]taylor:  Taking taylor expansion of (* (cbrt (/ (* (acos v2_y) 180) PI)) (cbrt (/ (* (acos v2_y) 180) PI))) in v2_y
* [misc]taylor:  Taking taylor expansion of (cbrt (/ (* (acos v2_y) 180) PI)) in v2_y
* [misc]taylor:  Rewrote expression to (pow (/ (* (acos v2_y) 180) PI) 1/3)
* [misc]taylor:  Taking taylor expansion of (exp (* 1/3 (log (/ (* (acos v2_y) 180) PI)))) in v2_y
* [misc]taylor:  Taking taylor expansion of (* 1/3 (log (/ (* (acos v2_y) 180) PI))) in v2_y
* [misc]taylor:  Taking taylor expansion of 1/3 in v2_y
* [misc]backup-simplify:  Simplify 1/3 into 1/3
* [misc]taylor:  Taking taylor expansion of (log (/ (* (acos v2_y) 180) PI)) in v2_y
* [misc]taylor:  Taking taylor expansion of (/ (* (acos v2_y) 180) PI) in v2_y
* [misc]taylor:  Taking taylor expansion of (* (acos v2_y) 180) in v2_y
* [misc]taylor:  Taking taylor expansion of (acos v2_y) in v2_y
* [misc]backup-simplify:  Simplify (acos v2_y) into (acos v2_y)
* [misc]taylor:  Taking taylor expansion of 180 in v2_y
* [misc]backup-simplify:  Simplify 180 into 180
* [misc]taylor:  Taking taylor expansion of PI in v2_y
* [misc]backup-simplify:  Simplify PI into PI
* [misc]backup-simplify:  Simplify (* (acos v2_y) 180) into (* 180 (acos v2_y))
* [misc]backup-simplify:  Simplify (/ (* 180 (acos v2_y)) PI) into (* 180 (/ (acos v2_y) PI))
* [misc]backup-simplify:  Simplify (log (* 180 (/ (acos v2_y) PI))) into (log (* 180 (/ (acos v2_y) PI)))
* [misc]backup-simplify:  Simplify (* 1/3 (log (* 180 (/ (acos v2_y) PI)))) into (* 1/3 (log (* 180 (/ (acos v2_y) PI))))
* [misc]backup-simplify:  Simplify (exp (* 1/3 (log (* 180 (/ (acos v2_y) PI))))) into (pow (* 180 (/ (acos v2_y) PI)) 1/3)
* [misc]taylor:  Taking taylor expansion of (cbrt (/ (* (acos v2_y) 180) PI)) in v2_y
* [misc]taylor:  Rewrote expression to (pow (/ (* (acos v2_y) 180) PI) 1/3)
* [misc]taylor:  Taking taylor expansion of (exp (* 1/3 (log (/ (* (acos v2_y) 180) PI)))) in v2_y
* [misc]taylor:  Taking taylor expansion of (* 1/3 (log (/ (* (acos v2_y) 180) PI))) in v2_y
* [misc]taylor:  Taking taylor expansion of 1/3 in v2_y
* [misc]backup-simplify:  Simplify 1/3 into 1/3
* [misc]taylor:  Taking taylor expansion of (log (/ (* (acos v2_y) 180) PI)) in v2_y
* [misc]taylor:  Taking taylor expansion of (/ (* (acos v2_y) 180) PI) in v2_y
* [misc]taylor:  Taking taylor expansion of (* (acos v2_y) 180) in v2_y
* [misc]taylor:  Taking taylor expansion of (acos v2_y) in v2_y
* [misc]backup-simplify:  Simplify (acos v2_y) into (acos v2_y)
* [misc]taylor:  Taking taylor expansion of 180 in v2_y
* [misc]backup-simplify:  Simplify 180 into 180
* [misc]taylor:  Taking taylor expansion of PI in v2_y
* [misc]backup-simplify:  Simplify PI into PI
* [misc]backup-simplify:  Simplify (* (acos v2_y) 180) into (* 180 (acos v2_y))
* [misc]backup-simplify:  Simplify (/ (* 180 (acos v2_y)) PI) into (* 180 (/ (acos v2_y) PI))
* [misc]backup-simplify:  Simplify (log (* 180 (/ (acos v2_y) PI))) into (log (* 180 (/ (acos v2_y) PI)))
* [misc]backup-simplify:  Simplify (* 1/3 (log (* 180 (/ (acos v2_y) PI)))) into (* 1/3 (log (* 180 (/ (acos v2_y) PI))))
* [misc]backup-simplify:  Simplify (exp (* 1/3 (log (* 180 (/ (acos v2_y) PI))))) into (pow (* 180 (/ (acos v2_y) PI)) 1/3)
* [misc]backup-simplify:  Simplify (* (pow (* 180 (/ (acos v2_y) PI)) 1/3) (pow (* 180 (/ (acos v2_y) PI)) 1/3)) into (pow (/ (* (pow 180 2) (pow (acos v2_y) 2)) (pow PI 2)) 1/3)
* [misc]backup-simplify:  Simplify (pow (/ (* (pow 180 2) (pow (acos v2_y) 2)) (pow PI 2)) 1/3) into (pow (* 32400 (/ (pow (acos v2_y) 2) (pow PI 2))) 1/3)
* [misc]backup-simplify:  Simplify (+ (* (acos v2_y) 0) (* 0 180)) into 0
* [misc]backup-simplify:  Simplify (- (/ 0 PI) (+ (* (* 180 (/ (acos v2_y) PI)) (/ 0 PI)))) into 0
* [misc]backup-simplify:  Simplify (/ (+ (* 1 (/ (* (pow (* 1 0) 1)) (pow (* 180 (/ (acos v2_y) PI)) 1)))) 1) into 0
* [misc]backup-simplify:  Simplify (+ (* 1/3 0) (* 0 (log (* 180 (/ (acos v2_y) PI))))) into 0
* [misc]backup-simplify:  Simplify (* (exp (* 1/3 (log (* 180 (/ (acos v2_y) PI))))) (+ (* (/ (pow 0 1) 1)))) into 0
* [misc]backup-simplify:  Simplify (+ (* (acos v2_y) 0) (* 0 180)) into 0
* [misc]backup-simplify:  Simplify (- (/ 0 PI) (+ (* (* 180 (/ (acos v2_y) PI)) (/ 0 PI)))) into 0
* [misc]backup-simplify:  Simplify (/ (+ (* 1 (/ (* (pow (* 1 0) 1)) (pow (* 180 (/ (acos v2_y) PI)) 1)))) 1) into 0
* [misc]backup-simplify:  Simplify (+ (* 1/3 0) (* 0 (log (* 180 (/ (acos v2_y) PI))))) into 0
* [misc]backup-simplify:  Simplify (* (exp (* 1/3 (log (* 180 (/ (acos v2_y) PI))))) (+ (* (/ (pow 0 1) 1)))) into 0
* [misc]backup-simplify:  Simplify (+ (* (pow (* 180 (/ (acos v2_y) PI)) 1/3) 0) (* 0 (pow (* 180 (/ (acos v2_y) PI)) 1/3))) into 0
* [misc]backup-simplify:  Simplify 0 into 0
* [misc]backup-simplify:  Simplify (+ (* (acos v2_y) 0) (+ (* 0 0) (* 0 180))) into 0
* [misc]backup-simplify:  Simplify (- (/ 0 PI) (+ (* (* 180 (/ (acos v2_y) PI)) (/ 0 PI)) (* 0 (/ 0 PI)))) into 0
* [misc]backup-simplify:  Simplify (/ (+ (* -1 (/ (* (pow (* 1 0) 2)) (pow (* 180 (/ (acos v2_y) PI)) 2))) (* 1 (/ (* 1 (pow (* 2 0) 1)) (pow (* 180 (/ (acos v2_y) PI)) 1)))) 2) into 0
* [misc]backup-simplify:  Simplify (+ (* 1/3 0) (+ (* 0 0) (* 0 (log (* 180 (/ (acos v2_y) PI)))))) into 0
* [misc]backup-simplify:  Simplify (* (exp (* 1/3 (log (* 180 (/ (acos v2_y) PI))))) (+ (* (/ (pow 0 2) 2)) (* (/ (pow 0 1) 1)))) into 0
* [misc]backup-simplify:  Simplify (+ (* (acos v2_y) 0) (+ (* 0 0) (* 0 180))) into 0
* [misc]backup-simplify:  Simplify (- (/ 0 PI) (+ (* (* 180 (/ (acos v2_y) PI)) (/ 0 PI)) (* 0 (/ 0 PI)))) into 0
* [misc]backup-simplify:  Simplify (/ (+ (* -1 (/ (* (pow (* 1 0) 2)) (pow (* 180 (/ (acos v2_y) PI)) 2))) (* 1 (/ (* 1 (pow (* 2 0) 1)) (pow (* 180 (/ (acos v2_y) PI)) 1)))) 2) into 0
* [misc]backup-simplify:  Simplify (+ (* 1/3 0) (+ (* 0 0) (* 0 (log (* 180 (/ (acos v2_y) PI)))))) into 0
* [misc]backup-simplify:  Simplify (* (exp (* 1/3 (log (* 180 (/ (acos v2_y) PI))))) (+ (* (/ (pow 0 2) 2)) (* (/ (pow 0 1) 1)))) into 0
* [misc]backup-simplify:  Simplify (+ (* (pow (* 180 (/ (acos v2_y) PI)) 1/3) 0) (+ (* 0 0) (* 0 (pow (* 180 (/ (acos v2_y) PI)) 1/3)))) into 0
* [misc]backup-simplify:  Simplify 0 into 0
* [misc]backup-simplify:  Simplify (+ (* (acos v2_y) 0) (+ (* 0 0) (+ (* 0 0) (* 0 180)))) into 0
* [misc]backup-simplify:  Simplify (- (/ 0 PI) (+ (* (* 180 (/ (acos v2_y) PI)) (/ 0 PI)) (* 0 (/ 0 PI)) (* 0 (/ 0 PI)))) into 0
* [misc]backup-simplify:  Simplify (/ (+ (* 2 (/ (* (pow (* 1 0) 3)) (pow (* 180 (/ (acos v2_y) PI)) 3))) (* -3 (/ (* (pow (* 1 0) 1) (pow (* 2 0) 1)) (pow (* 180 (/ (acos v2_y) PI)) 2))) (* 1 (/ (* 1 1 (pow (* 6 0) 1)) (pow (* 180 (/ (acos v2_y) PI)) 1)))) 6) into 0
* [misc]backup-simplify:  Simplify (+ (* 1/3 0) (+ (* 0 0) (+ (* 0 0) (* 0 (log (* 180 (/ (acos v2_y) PI))))))) into 0
* [misc]backup-simplify:  Simplify (* (exp (* 1/3 (log (* 180 (/ (acos v2_y) PI))))) (+ (* (/ (pow 0 3) 6)) (* (/ (pow 0 1) 1) (/ (pow 0 1) 1)) (* (/ (pow 0 1) 1)))) into 0
* [misc]backup-simplify:  Simplify (+ (* (acos v2_y) 0) (+ (* 0 0) (+ (* 0 0) (* 0 180)))) into 0
* [misc]backup-simplify:  Simplify (- (/ 0 PI) (+ (* (* 180 (/ (acos v2_y) PI)) (/ 0 PI)) (* 0 (/ 0 PI)) (* 0 (/ 0 PI)))) into 0
* [misc]backup-simplify:  Simplify (/ (+ (* 2 (/ (* (pow (* 1 0) 3)) (pow (* 180 (/ (acos v2_y) PI)) 3))) (* -3 (/ (* (pow (* 1 0) 1) (pow (* 2 0) 1)) (pow (* 180 (/ (acos v2_y) PI)) 2))) (* 1 (/ (* 1 1 (pow (* 6 0) 1)) (pow (* 180 (/ (acos v2_y) PI)) 1)))) 6) into 0
* [misc]backup-simplify:  Simplify (+ (* 1/3 0) (+ (* 0 0) (+ (* 0 0) (* 0 (log (* 180 (/ (acos v2_y) PI))))))) into 0
* [misc]backup-simplify:  Simplify (* (exp (* 1/3 (log (* 180 (/ (acos v2_y) PI))))) (+ (* (/ (pow 0 3) 6)) (* (/ (pow 0 1) 1) (/ (pow 0 1) 1)) (* (/ (pow 0 1) 1)))) into 0
* [misc]backup-simplify:  Simplify (+ (* (pow (* 180 (/ (acos v2_y) PI)) 1/3) 0) (+ (* 0 0) (+ (* 0 0) (* 0 (pow (* 180 (/ (acos v2_y) PI)) 1/3))))) into 0
* [misc]backup-simplify:  Simplify 0 into 0
* [misc]backup-simplify:  Simplify (+ (* (acos v2_y) 0) (+ (* 0 0) (+ (* 0 0) (+ (* 0 0) (* 0 180))))) into 0
* [misc]backup-simplify:  Simplify (- (/ 0 PI) (+ (* (* 180 (/ (acos v2_y) PI)) (/ 0 PI)) (* 0 (/ 0 PI)) (* 0 (/ 0 PI)) (* 0 (/ 0 PI)))) into 0
* [misc]backup-simplify:  Simplify (/ (+ (* -6 (/ (* (pow (* 1 0) 4)) (pow (* 180 (/ (acos v2_y) PI)) 4))) (* 12 (/ (* (pow (* 1 0) 2) (pow (* 2 0) 1)) (pow (* 180 (/ (acos v2_y) PI)) 3))) (* -3 (/ (* 1 (pow (* 2 0) 2)) (pow (* 180 (/ (acos v2_y) PI)) 2))) (* -4 (/ (* (pow (* 1 0) 1) 1 (pow (* 6 0) 1)) (pow (* 180 (/ (acos v2_y) PI)) 2))) (* 1 (/ (* 1 1 1 (pow (* 24 0) 1)) (pow (* 180 (/ (acos v2_y) PI)) 1)))) 24) into 0
* [misc]backup-simplify:  Simplify (+ (* 1/3 0) (+ (* 0 0) (+ (* 0 0) (+ (* 0 0) (* 0 (log (* 180 (/ (acos v2_y) PI)))))))) into 0
* [misc]backup-simplify:  Simplify (* (exp (* 1/3 (log (* 180 (/ (acos v2_y) PI))))) (+ (* (/ (pow 0 4) 24)) (* (/ (pow 0 2) 2) (/ (pow 0 1) 1)) (* (/ (pow 0 1) 1) (/ (pow 0 1) 1)) (* (/ (pow 0 2) 2)) (* (/ (pow 0 1) 1)))) into 0
* [misc]backup-simplify:  Simplify (+ (* (acos v2_y) 0) (+ (* 0 0) (+ (* 0 0) (+ (* 0 0) (* 0 180))))) into 0
* [misc]backup-simplify:  Simplify (- (/ 0 PI) (+ (* (* 180 (/ (acos v2_y) PI)) (/ 0 PI)) (* 0 (/ 0 PI)) (* 0 (/ 0 PI)) (* 0 (/ 0 PI)))) into 0
* [misc]backup-simplify:  Simplify (/ (+ (* -6 (/ (* (pow (* 1 0) 4)) (pow (* 180 (/ (acos v2_y) PI)) 4))) (* 12 (/ (* (pow (* 1 0) 2) (pow (* 2 0) 1)) (pow (* 180 (/ (acos v2_y) PI)) 3))) (* -3 (/ (* 1 (pow (* 2 0) 2)) (pow (* 180 (/ (acos v2_y) PI)) 2))) (* -4 (/ (* (pow (* 1 0) 1) 1 (pow (* 6 0) 1)) (pow (* 180 (/ (acos v2_y) PI)) 2))) (* 1 (/ (* 1 1 1 (pow (* 24 0) 1)) (pow (* 180 (/ (acos v2_y) PI)) 1)))) 24) into 0
* [misc]backup-simplify:  Simplify (+ (* 1/3 0) (+ (* 0 0) (+ (* 0 0) (+ (* 0 0) (* 0 (log (* 180 (/ (acos v2_y) PI)))))))) into 0
* [misc]backup-simplify:  Simplify (* (exp (* 1/3 (log (* 180 (/ (acos v2_y) PI))))) (+ (* (/ (pow 0 4) 24)) (* (/ (pow 0 2) 2) (/ (pow 0 1) 1)) (* (/ (pow 0 1) 1) (/ (pow 0 1) 1)) (* (/ (pow 0 2) 2)) (* (/ (pow 0 1) 1)))) into 0
* [misc]backup-simplify:  Simplify (+ (* (pow (* 180 (/ (acos v2_y) PI)) 1/3) 0) (+ (* 0 0) (+ (* 0 0) (+ (* 0 0) (* 0 (pow (* 180 (/ (acos v2_y) PI)) 1/3)))))) into 0
* [misc]backup-simplify:  Simplify 0 into 0
* [misc]backup-simplify:  Simplify (+ (* (acos v2_y) 0) (+ (* 0 0) (+ (* 0 0) (+ (* 0 0) (+ (* 0 0) (* 0 180)))))) into 0
* [misc]backup-simplify:  Simplify (- (/ 0 PI) (+ (* (* 180 (/ (acos v2_y) PI)) (/ 0 PI)) (* 0 (/ 0 PI)) (* 0 (/ 0 PI)) (* 0 (/ 0 PI)) (* 0 (/ 0 PI)))) into 0
* [misc]backup-simplify:  Simplify (/ (+ (* 24 (/ (* (pow (* 1 0) 5)) (pow (* 180 (/ (acos v2_y) PI)) 5))) (* -60 (/ (* (pow (* 1 0) 3) (pow (* 2 0) 1)) (pow (* 180 (/ (acos v2_y) PI)) 4))) (* 30 (/ (* (pow (* 1 0) 1) (pow (* 2 0) 2)) (pow (* 180 (/ (acos v2_y) PI)) 3))) (* 20 (/ (* (pow (* 1 0) 2) 1 (pow (* 6 0) 1)) (pow (* 180 (/ (acos v2_y) PI)) 3))) (* -10 (/ (* 1 (pow (* 2 0) 1) (pow (* 6 0) 1)) (pow (* 180 (/ (acos v2_y) PI)) 2))) (* -5 (/ (* (pow (* 1 0) 1) 1 1 (pow (* 24 0) 1)) (pow (* 180 (/ (acos v2_y) PI)) 2))) (* 1 (/ (* 1 1 1 1 (pow (* 120 0) 1)) (pow (* 180 (/ (acos v2_y) PI)) 1)))) 120) into 0
* [misc]backup-simplify:  Simplify (+ (* 1/3 0) (+ (* 0 0) (+ (* 0 0) (+ (* 0 0) (+ (* 0 0) (* 0 (log (* 180 (/ (acos v2_y) PI))))))))) into 0
* [misc]backup-simplify:  Simplify (* (exp (* 1/3 (log (* 180 (/ (acos v2_y) PI))))) (+ (* (/ (pow 0 5) 120)) (* (/ (pow 0 3) 6) (/ (pow 0 1) 1)) (* (/ (pow 0 2) 2) (/ (pow 0 1) 1)) (* (/ (pow 0 1) 1) (/ (pow 0 2) 2)) (* (/ (pow 0 1) 1) (/ (pow 0 1) 1)) (* (/ (pow 0 1) 1) (/ (pow 0 1) 1)) (* (/ (pow 0 1) 1)))) into 0
* [misc]backup-simplify:  Simplify (+ (* (acos v2_y) 0) (+ (* 0 0) (+ (* 0 0) (+ (* 0 0) (+ (* 0 0) (* 0 180)))))) into 0
* [misc]backup-simplify:  Simplify (- (/ 0 PI) (+ (* (* 180 (/ (acos v2_y) PI)) (/ 0 PI)) (* 0 (/ 0 PI)) (* 0 (/ 0 PI)) (* 0 (/ 0 PI)) (* 0 (/ 0 PI)))) into 0
* [misc]backup-simplify:  Simplify (/ (+ (* 24 (/ (* (pow (* 1 0) 5)) (pow (* 180 (/ (acos v2_y) PI)) 5))) (* -60 (/ (* (pow (* 1 0) 3) (pow (* 2 0) 1)) (pow (* 180 (/ (acos v2_y) PI)) 4))) (* 30 (/ (* (pow (* 1 0) 1) (pow (* 2 0) 2)) (pow (* 180 (/ (acos v2_y) PI)) 3))) (* 20 (/ (* (pow (* 1 0) 2) 1 (pow (* 6 0) 1)) (pow (* 180 (/ (acos v2_y) PI)) 3))) (* -10 (/ (* 1 (pow (* 2 0) 1) (pow (* 6 0) 1)) (pow (* 180 (/ (acos v2_y) PI)) 2))) (* -5 (/ (* (pow (* 1 0) 1) 1 1 (pow (* 24 0) 1)) (pow (* 180 (/ (acos v2_y) PI)) 2))) (* 1 (/ (* 1 1 1 1 (pow (* 120 0) 1)) (pow (* 180 (/ (acos v2_y) PI)) 1)))) 120) into 0
* [misc]backup-simplify:  Simplify (+ (* 1/3 0) (+ (* 0 0) (+ (* 0 0) (+ (* 0 0) (+ (* 0 0) (* 0 (log (* 180 (/ (acos v2_y) PI))))))))) into 0
* [misc]backup-simplify:  Simplify (* (exp (* 1/3 (log (* 180 (/ (acos v2_y) PI))))) (+ (* (/ (pow 0 5) 120)) (* (/ (pow 0 3) 6) (/ (pow 0 1) 1)) (* (/ (pow 0 2) 2) (/ (pow 0 1) 1)) (* (/ (pow 0 1) 1) (/ (pow 0 2) 2)) (* (/ (pow 0 1) 1) (/ (pow 0 1) 1)) (* (/ (pow 0 1) 1) (/ (pow 0 1) 1)) (* (/ (pow 0 1) 1)))) into 0
* [misc]backup-simplify:  Simplify (+ (* (pow (* 180 (/ (acos v2_y) PI)) 1/3) 0) (+ (* 0 0) (+ (* 0 0) (+ (* 0 0) (+ (* 0 0) (* 0 (pow (* 180 (/ (acos v2_y) PI)) 1/3))))))) into 0
* [misc]backup-simplify:  Simplify 0 into 0
* [misc]backup-simplify:  Simplify (+ (* (acos v2_y) 0) (+ (* 0 0) (+ (* 0 0) (+ (* 0 0) (+ (* 0 0) (+ (* 0 0) (* 0 180))))))) into 0
* [misc]backup-simplify:  Simplify (- (/ 0 PI) (+ (* (* 180 (/ (acos v2_y) PI)) (/ 0 PI)) (* 0 (/ 0 PI)) (* 0 (/ 0 PI)) (* 0 (/ 0 PI)) (* 0 (/ 0 PI)) (* 0 (/ 0 PI)))) into 0
* [misc]backup-simplify:  Simplify (/ (+ (* -120 (/ (* (pow (* 1 0) 6)) (pow (* 180 (/ (acos v2_y) PI)) 6))) (* 360 (/ (* (pow (* 1 0) 4) (pow (* 2 0) 1)) (pow (* 180 (/ (acos v2_y) PI)) 5))) (* -270 (/ (* (pow (* 1 0) 2) (pow (* 2 0) 2)) (pow (* 180 (/ (acos v2_y) PI)) 4))) (* -120 (/ (* (pow (* 1 0) 3) 1 (pow (* 6 0) 1)) (pow (* 180 (/ (acos v2_y) PI)) 4))) (* 30 (/ (* 1 (pow (* 2 0) 3)) (pow (* 180 (/ (acos v2_y) PI)) 3))) (* 120 (/ (* (pow (* 1 0) 1) (pow (* 2 0) 1) (pow (* 6 0) 1)) (pow (* 180 (/ (acos v2_y) PI)) 3))) (* 30 (/ (* (pow (* 1 0) 2) 1 1 (pow (* 24 0) 1)) (pow (* 180 (/ (acos v2_y) PI)) 3))) (* -10 (/ (* 1 1 (pow (* 6 0) 2)) (pow (* 180 (/ (acos v2_y) PI)) 2))) (* -15 (/ (* 1 (pow (* 2 0) 1) 1 (pow (* 24 0) 1)) (pow (* 180 (/ (acos v2_y) PI)) 2))) (* -6 (/ (* (pow (* 1 0) 1) 1 1 1 (pow (* 120 0) 1)) (pow (* 180 (/ (acos v2_y) PI)) 2))) (* 1 (/ (* 1 1 1 1 1 (pow (* 720 0) 1)) (pow (* 180 (/ (acos v2_y) PI)) 1)))) 720) into 0
* [misc]backup-simplify:  Simplify (+ (* 1/3 0) (+ (* 0 0) (+ (* 0 0) (+ (* 0 0) (+ (* 0 0) (+ (* 0 0) (* 0 (log (* 180 (/ (acos v2_y) PI)))))))))) into 0
* [misc]backup-simplify:  Simplify (* (exp (* 1/3 (log (* 180 (/ (acos v2_y) PI))))) (+ (* (/ (pow 0 6) 720)) (* (/ (pow 0 4) 24) (/ (pow 0 1) 1)) (* (/ (pow 0 3) 6) (/ (pow 0 1) 1)) (* (/ (pow 0 2) 2) (/ (pow 0 2) 2)) (* (/ (pow 0 2) 2) (/ (pow 0 1) 1)) (* (/ (pow 0 1) 1) (/ (pow 0 1) 1) (/ (pow 0 1) 1)) (* (/ (pow 0 1) 1) (/ (pow 0 1) 1)) (* (/ (pow 0 3) 6)) (* (/ (pow 0 1) 1) (/ (pow 0 1) 1)) (* (/ (pow 0 2) 2)) (* (/ (pow 0 1) 1)))) into 0
* [misc]backup-simplify:  Simplify (+ (* (acos v2_y) 0) (+ (* 0 0) (+ (* 0 0) (+ (* 0 0) (+ (* 0 0) (+ (* 0 0) (* 0 180))))))) into 0
* [misc]backup-simplify:  Simplify (- (/ 0 PI) (+ (* (* 180 (/ (acos v2_y) PI)) (/ 0 PI)) (* 0 (/ 0 PI)) (* 0 (/ 0 PI)) (* 0 (/ 0 PI)) (* 0 (/ 0 PI)) (* 0 (/ 0 PI)))) into 0
* [misc]backup-simplify:  Simplify (/ (+ (* -120 (/ (* (pow (* 1 0) 6)) (pow (* 180 (/ (acos v2_y) PI)) 6))) (* 360 (/ (* (pow (* 1 0) 4) (pow (* 2 0) 1)) (pow (* 180 (/ (acos v2_y) PI)) 5))) (* -270 (/ (* (pow (* 1 0) 2) (pow (* 2 0) 2)) (pow (* 180 (/ (acos v2_y) PI)) 4))) (* -120 (/ (* (pow (* 1 0) 3) 1 (pow (* 6 0) 1)) (pow (* 180 (/ (acos v2_y) PI)) 4))) (* 30 (/ (* 1 (pow (* 2 0) 3)) (pow (* 180 (/ (acos v2_y) PI)) 3))) (* 120 (/ (* (pow (* 1 0) 1) (pow (* 2 0) 1) (pow (* 6 0) 1)) (pow (* 180 (/ (acos v2_y) PI)) 3))) (* 30 (/ (* (pow (* 1 0) 2) 1 1 (pow (* 24 0) 1)) (pow (* 180 (/ (acos v2_y) PI)) 3))) (* -10 (/ (* 1 1 (pow (* 6 0) 2)) (pow (* 180 (/ (acos v2_y) PI)) 2))) (* -15 (/ (* 1 (pow (* 2 0) 1) 1 (pow (* 24 0) 1)) (pow (* 180 (/ (acos v2_y) PI)) 2))) (* -6 (/ (* (pow (* 1 0) 1) 1 1 1 (pow (* 120 0) 1)) (pow (* 180 (/ (acos v2_y) PI)) 2))) (* 1 (/ (* 1 1 1 1 1 (pow (* 720 0) 1)) (pow (* 180 (/ (acos v2_y) PI)) 1)))) 720) into 0
* [misc]backup-simplify:  Simplify (+ (* 1/3 0) (+ (* 0 0) (+ (* 0 0) (+ (* 0 0) (+ (* 0 0) (+ (* 0 0) (* 0 (log (* 180 (/ (acos v2_y) PI)))))))))) into 0
* [misc]backup-simplify:  Simplify (* (exp (* 1/3 (log (* 180 (/ (acos v2_y) PI))))) (+ (* (/ (pow 0 6) 720)) (* (/ (pow 0 4) 24) (/ (pow 0 1) 1)) (* (/ (pow 0 3) 6) (/ (pow 0 1) 1)) (* (/ (pow 0 2) 2) (/ (pow 0 2) 2)) (* (/ (pow 0 2) 2) (/ (pow 0 1) 1)) (* (/ (pow 0 1) 1) (/ (pow 0 1) 1) (/ (pow 0 1) 1)) (* (/ (pow 0 1) 1) (/ (pow 0 1) 1)) (* (/ (pow 0 3) 6)) (* (/ (pow 0 1) 1) (/ (pow 0 1) 1)) (* (/ (pow 0 2) 2)) (* (/ (pow 0 1) 1)))) into 0
* [misc]backup-simplify:  Simplify (+ (* (pow (* 180 (/ (acos v2_y) PI)) 1/3) 0) (+ (* 0 0) (+ (* 0 0) (+ (* 0 0) (+ (* 0 0) (+ (* 0 0) (* 0 (pow (* 180 (/ (acos v2_y) PI)) 1/3)))))))) into 0
* [misc]backup-simplify:  Simplify 0 into 0
* [misc]backup-simplify:  Simplify (pow (* 32400 (/ (pow (acos v2_y) 2) (pow PI 2))) 1/3) into (pow (* 32400 (/ (pow (acos v2_y) 2) (pow PI 2))) 1/3)
* [misc]approximate:  Taking taylor expansion of (* (cbrt (/ (* (acos (/ 1 v2_y)) 180) PI)) (cbrt (/ (* (acos (/ 1 v2_y)) 180) PI))) in (v2_y) around 0
* [misc]taylor:  Taking taylor expansion of (* (cbrt (/ (* (acos (/ 1 v2_y)) 180) PI)) (cbrt (/ (* (acos (/ 1 v2_y)) 180) PI))) in v2_y
* [misc]taylor:  Taking taylor expansion of (cbrt (/ (* (acos (/ 1 v2_y)) 180) PI)) in v2_y
* [misc]taylor:  Rewrote expression to (pow (/ (* (acos (/ 1 v2_y)) 180) PI) 1/3)
* [misc]taylor:  Taking taylor expansion of (exp (* 1/3 (log (/ (* (acos (/ 1 v2_y)) 180) PI)))) in v2_y
* [misc]taylor:  Taking taylor expansion of (* 1/3 (log (/ (* (acos (/ 1 v2_y)) 180) PI))) in v2_y
* [misc]taylor:  Taking taylor expansion of 1/3 in v2_y
* [misc]backup-simplify:  Simplify 1/3 into 1/3
* [misc]taylor:  Taking taylor expansion of (log (/ (* (acos (/ 1 v2_y)) 180) PI)) in v2_y
* [misc]taylor:  Taking taylor expansion of (/ (* (acos (/ 1 v2_y)) 180) PI) in v2_y
* [misc]taylor:  Taking taylor expansion of (* (acos (/ 1 v2_y)) 180) in v2_y
* [misc]taylor:  Taking taylor expansion of (acos (/ 1 v2_y)) in v2_y
* [misc]backup-simplify:  Simplify (acos (/ 1 v2_y)) into (acos (/ 1 v2_y))
* [misc]taylor:  Taking taylor expansion of 180 in v2_y
* [misc]backup-simplify:  Simplify 180 into 180
* [misc]taylor:  Taking taylor expansion of PI in v2_y
* [misc]backup-simplify:  Simplify PI into PI
* [misc]backup-simplify:  Simplify (* (acos (/ 1 v2_y)) 180) into (* 180 (acos (/ 1 v2_y)))
* [misc]backup-simplify:  Simplify (/ (* 180 (acos (/ 1 v2_y))) PI) into (* 180 (/ (acos (/ 1 v2_y)) PI))
* [misc]backup-simplify:  Simplify (log (* 180 (/ (acos (/ 1 v2_y)) PI))) into (log (* 180 (/ (acos (/ 1 v2_y)) PI)))
* [misc]backup-simplify:  Simplify (* 1/3 (log (* 180 (/ (acos (/ 1 v2_y)) PI)))) into (* 1/3 (log (* 180 (/ (acos (/ 1 v2_y)) PI))))
* [misc]backup-simplify:  Simplify (exp (* 1/3 (log (* 180 (/ (acos (/ 1 v2_y)) PI))))) into (pow (* 180 (/ (acos (/ 1 v2_y)) PI)) 1/3)
* [misc]taylor:  Taking taylor expansion of (cbrt (/ (* (acos (/ 1 v2_y)) 180) PI)) in v2_y
* [misc]taylor:  Rewrote expression to (pow (/ (* (acos (/ 1 v2_y)) 180) PI) 1/3)
* [misc]taylor:  Taking taylor expansion of (exp (* 1/3 (log (/ (* (acos (/ 1 v2_y)) 180) PI)))) in v2_y
* [misc]taylor:  Taking taylor expansion of (* 1/3 (log (/ (* (acos (/ 1 v2_y)) 180) PI))) in v2_y
* [misc]taylor:  Taking taylor expansion of 1/3 in v2_y
* [misc]backup-simplify:  Simplify 1/3 into 1/3
* [misc]taylor:  Taking taylor expansion of (log (/ (* (acos (/ 1 v2_y)) 180) PI)) in v2_y
* [misc]taylor:  Taking taylor expansion of (/ (* (acos (/ 1 v2_y)) 180) PI) in v2_y
* [misc]taylor:  Taking taylor expansion of (* (acos (/ 1 v2_y)) 180) in v2_y
* [misc]taylor:  Taking taylor expansion of (acos (/ 1 v2_y)) in v2_y
* [misc]backup-simplify:  Simplify (acos (/ 1 v2_y)) into (acos (/ 1 v2_y))
* [misc]taylor:  Taking taylor expansion of 180 in v2_y
* [misc]backup-simplify:  Simplify 180 into 180
* [misc]taylor:  Taking taylor expansion of PI in v2_y
* [misc]backup-simplify:  Simplify PI into PI
* [misc]backup-simplify:  Simplify (* (acos (/ 1 v2_y)) 180) into (* 180 (acos (/ 1 v2_y)))
* [misc]backup-simplify:  Simplify (/ (* 180 (acos (/ 1 v2_y))) PI) into (* 180 (/ (acos (/ 1 v2_y)) PI))
* [misc]backup-simplify:  Simplify (log (* 180 (/ (acos (/ 1 v2_y)) PI))) into (log (* 180 (/ (acos (/ 1 v2_y)) PI)))
* [misc]backup-simplify:  Simplify (* 1/3 (log (* 180 (/ (acos (/ 1 v2_y)) PI)))) into (* 1/3 (log (* 180 (/ (acos (/ 1 v2_y)) PI))))
* [misc]backup-simplify:  Simplify (exp (* 1/3 (log (* 180 (/ (acos (/ 1 v2_y)) PI))))) into (pow (* 180 (/ (acos (/ 1 v2_y)) PI)) 1/3)
* [misc]taylor:  Taking taylor expansion of (* (cbrt (/ (* (acos (/ 1 v2_y)) 180) PI)) (cbrt (/ (* (acos (/ 1 v2_y)) 180) PI))) in v2_y
* [misc]taylor:  Taking taylor expansion of (cbrt (/ (* (acos (/ 1 v2_y)) 180) PI)) in v2_y
* [misc]taylor:  Rewrote expression to (pow (/ (* (acos (/ 1 v2_y)) 180) PI) 1/3)
* [misc]taylor:  Taking taylor expansion of (exp (* 1/3 (log (/ (* (acos (/ 1 v2_y)) 180) PI)))) in v2_y
* [misc]taylor:  Taking taylor expansion of (* 1/3 (log (/ (* (acos (/ 1 v2_y)) 180) PI))) in v2_y
* [misc]taylor:  Taking taylor expansion of 1/3 in v2_y
* [misc]backup-simplify:  Simplify 1/3 into 1/3
* [misc]taylor:  Taking taylor expansion of (log (/ (* (acos (/ 1 v2_y)) 180) PI)) in v2_y
* [misc]taylor:  Taking taylor expansion of (/ (* (acos (/ 1 v2_y)) 180) PI) in v2_y
* [misc]taylor:  Taking taylor expansion of (* (acos (/ 1 v2_y)) 180) in v2_y
* [misc]taylor:  Taking taylor expansion of (acos (/ 1 v2_y)) in v2_y
* [misc]backup-simplify:  Simplify (acos (/ 1 v2_y)) into (acos (/ 1 v2_y))
* [misc]taylor:  Taking taylor expansion of 180 in v2_y
* [misc]backup-simplify:  Simplify 180 into 180
* [misc]taylor:  Taking taylor expansion of PI in v2_y
* [misc]backup-simplify:  Simplify PI into PI
* [misc]backup-simplify:  Simplify (* (acos (/ 1 v2_y)) 180) into (* 180 (acos (/ 1 v2_y)))
* [misc]backup-simplify:  Simplify (/ (* 180 (acos (/ 1 v2_y))) PI) into (* 180 (/ (acos (/ 1 v2_y)) PI))
* [misc]backup-simplify:  Simplify (log (* 180 (/ (acos (/ 1 v2_y)) PI))) into (log (* 180 (/ (acos (/ 1 v2_y)) PI)))
* [misc]backup-simplify:  Simplify (* 1/3 (log (* 180 (/ (acos (/ 1 v2_y)) PI)))) into (* 1/3 (log (* 180 (/ (acos (/ 1 v2_y)) PI))))
* [misc]backup-simplify:  Simplify (exp (* 1/3 (log (* 180 (/ (acos (/ 1 v2_y)) PI))))) into (pow (* 180 (/ (acos (/ 1 v2_y)) PI)) 1/3)
* [misc]taylor:  Taking taylor expansion of (cbrt (/ (* (acos (/ 1 v2_y)) 180) PI)) in v2_y
* [misc]taylor:  Rewrote expression to (pow (/ (* (acos (/ 1 v2_y)) 180) PI) 1/3)
* [misc]taylor:  Taking taylor expansion of (exp (* 1/3 (log (/ (* (acos (/ 1 v2_y)) 180) PI)))) in v2_y
* [misc]taylor:  Taking taylor expansion of (* 1/3 (log (/ (* (acos (/ 1 v2_y)) 180) PI))) in v2_y
* [misc]taylor:  Taking taylor expansion of 1/3 in v2_y
* [misc]backup-simplify:  Simplify 1/3 into 1/3
* [misc]taylor:  Taking taylor expansion of (log (/ (* (acos (/ 1 v2_y)) 180) PI)) in v2_y
* [misc]taylor:  Taking taylor expansion of (/ (* (acos (/ 1 v2_y)) 180) PI) in v2_y
* [misc]taylor:  Taking taylor expansion of (* (acos (/ 1 v2_y)) 180) in v2_y
* [misc]taylor:  Taking taylor expansion of (acos (/ 1 v2_y)) in v2_y
* [misc]backup-simplify:  Simplify (acos (/ 1 v2_y)) into (acos (/ 1 v2_y))
* [misc]taylor:  Taking taylor expansion of 180 in v2_y
* [misc]backup-simplify:  Simplify 180 into 180
* [misc]taylor:  Taking taylor expansion of PI in v2_y
* [misc]backup-simplify:  Simplify PI into PI
* [misc]backup-simplify:  Simplify (* (acos (/ 1 v2_y)) 180) into (* 180 (acos (/ 1 v2_y)))
* [misc]backup-simplify:  Simplify (/ (* 180 (acos (/ 1 v2_y))) PI) into (* 180 (/ (acos (/ 1 v2_y)) PI))
* [misc]backup-simplify:  Simplify (log (* 180 (/ (acos (/ 1 v2_y)) PI))) into (log (* 180 (/ (acos (/ 1 v2_y)) PI)))
* [misc]backup-simplify:  Simplify (* 1/3 (log (* 180 (/ (acos (/ 1 v2_y)) PI)))) into (* 1/3 (log (* 180 (/ (acos (/ 1 v2_y)) PI))))
* [misc]backup-simplify:  Simplify (exp (* 1/3 (log (* 180 (/ (acos (/ 1 v2_y)) PI))))) into (pow (* 180 (/ (acos (/ 1 v2_y)) PI)) 1/3)
* [misc]backup-simplify:  Simplify (* (pow (* 180 (/ (acos (/ 1 v2_y)) PI)) 1/3) (pow (* 180 (/ (acos (/ 1 v2_y)) PI)) 1/3)) into (pow (/ (* (pow (acos (/ 1 v2_y)) 2) (pow 180 2)) (pow PI 2)) 1/3)
* [misc]backup-simplify:  Simplify (pow (/ (* (pow (acos (/ 1 v2_y)) 2) (pow 180 2)) (pow PI 2)) 1/3) into (pow (* 32400 (/ (pow (acos (/ 1 v2_y)) 2) (pow PI 2))) 1/3)
* [misc]backup-simplify:  Simplify (+ (* (acos (/ 1 v2_y)) 0) (* 0 180)) into 0
* [misc]backup-simplify:  Simplify (- (/ 0 PI) (+ (* (* 180 (/ (acos (/ 1 v2_y)) PI)) (/ 0 PI)))) into 0
* [misc]backup-simplify:  Simplify (/ (+ (* 1 (/ (* (pow (* 1 0) 1)) (pow (* 180 (/ (acos (/ 1 v2_y)) PI)) 1)))) 1) into 0
* [misc]backup-simplify:  Simplify (+ (* 1/3 0) (* 0 (log (* 180 (/ (acos (/ 1 v2_y)) PI))))) into 0
* [misc]backup-simplify:  Simplify (* (exp (* 1/3 (log (* 180 (/ (acos (/ 1 v2_y)) PI))))) (+ (* (/ (pow 0 1) 1)))) into 0
* [misc]backup-simplify:  Simplify (+ (* (acos (/ 1 v2_y)) 0) (* 0 180)) into 0
* [misc]backup-simplify:  Simplify (- (/ 0 PI) (+ (* (* 180 (/ (acos (/ 1 v2_y)) PI)) (/ 0 PI)))) into 0
* [misc]backup-simplify:  Simplify (/ (+ (* 1 (/ (* (pow (* 1 0) 1)) (pow (* 180 (/ (acos (/ 1 v2_y)) PI)) 1)))) 1) into 0
* [misc]backup-simplify:  Simplify (+ (* 1/3 0) (* 0 (log (* 180 (/ (acos (/ 1 v2_y)) PI))))) into 0
* [misc]backup-simplify:  Simplify (* (exp (* 1/3 (log (* 180 (/ (acos (/ 1 v2_y)) PI))))) (+ (* (/ (pow 0 1) 1)))) into 0
* [misc]backup-simplify:  Simplify (+ (* (pow (* 180 (/ (acos (/ 1 v2_y)) PI)) 1/3) 0) (* 0 (pow (* 180 (/ (acos (/ 1 v2_y)) PI)) 1/3))) into 0
* [misc]backup-simplify:  Simplify 0 into 0
* [misc]backup-simplify:  Simplify (+ (* (acos (/ 1 v2_y)) 0) (+ (* 0 0) (* 0 180))) into 0
* [misc]backup-simplify:  Simplify (- (/ 0 PI) (+ (* (* 180 (/ (acos (/ 1 v2_y)) PI)) (/ 0 PI)) (* 0 (/ 0 PI)))) into 0
* [misc]backup-simplify:  Simplify (/ (+ (* -1 (/ (* (pow (* 1 0) 2)) (pow (* 180 (/ (acos (/ 1 v2_y)) PI)) 2))) (* 1 (/ (* 1 (pow (* 2 0) 1)) (pow (* 180 (/ (acos (/ 1 v2_y)) PI)) 1)))) 2) into 0
* [misc]backup-simplify:  Simplify (+ (* 1/3 0) (+ (* 0 0) (* 0 (log (* 180 (/ (acos (/ 1 v2_y)) PI)))))) into 0
* [misc]backup-simplify:  Simplify (* (exp (* 1/3 (log (* 180 (/ (acos (/ 1 v2_y)) PI))))) (+ (* (/ (pow 0 2) 2)) (* (/ (pow 0 1) 1)))) into 0
* [misc]backup-simplify:  Simplify (+ (* (acos (/ 1 v2_y)) 0) (+ (* 0 0) (* 0 180))) into 0
* [misc]backup-simplify:  Simplify (- (/ 0 PI) (+ (* (* 180 (/ (acos (/ 1 v2_y)) PI)) (/ 0 PI)) (* 0 (/ 0 PI)))) into 0
* [misc]backup-simplify:  Simplify (/ (+ (* -1 (/ (* (pow (* 1 0) 2)) (pow (* 180 (/ (acos (/ 1 v2_y)) PI)) 2))) (* 1 (/ (* 1 (pow (* 2 0) 1)) (pow (* 180 (/ (acos (/ 1 v2_y)) PI)) 1)))) 2) into 0
* [misc]backup-simplify:  Simplify (+ (* 1/3 0) (+ (* 0 0) (* 0 (log (* 180 (/ (acos (/ 1 v2_y)) PI)))))) into 0
* [misc]backup-simplify:  Simplify (* (exp (* 1/3 (log (* 180 (/ (acos (/ 1 v2_y)) PI))))) (+ (* (/ (pow 0 2) 2)) (* (/ (pow 0 1) 1)))) into 0
* [misc]backup-simplify:  Simplify (+ (* (pow (* 180 (/ (acos (/ 1 v2_y)) PI)) 1/3) 0) (+ (* 0 0) (* 0 (pow (* 180 (/ (acos (/ 1 v2_y)) PI)) 1/3)))) into 0
* [misc]backup-simplify:  Simplify 0 into 0
* [misc]backup-simplify:  Simplify (+ (* (acos (/ 1 v2_y)) 0) (+ (* 0 0) (+ (* 0 0) (* 0 180)))) into 0
* [misc]backup-simplify:  Simplify (- (/ 0 PI) (+ (* (* 180 (/ (acos (/ 1 v2_y)) PI)) (/ 0 PI)) (* 0 (/ 0 PI)) (* 0 (/ 0 PI)))) into 0
* [misc]backup-simplify:  Simplify (/ (+ (* 2 (/ (* (pow (* 1 0) 3)) (pow (* 180 (/ (acos (/ 1 v2_y)) PI)) 3))) (* -3 (/ (* (pow (* 1 0) 1) (pow (* 2 0) 1)) (pow (* 180 (/ (acos (/ 1 v2_y)) PI)) 2))) (* 1 (/ (* 1 1 (pow (* 6 0) 1)) (pow (* 180 (/ (acos (/ 1 v2_y)) PI)) 1)))) 6) into 0
* [misc]backup-simplify:  Simplify (+ (* 1/3 0) (+ (* 0 0) (+ (* 0 0) (* 0 (log (* 180 (/ (acos (/ 1 v2_y)) PI))))))) into 0
* [misc]backup-simplify:  Simplify (* (exp (* 1/3 (log (* 180 (/ (acos (/ 1 v2_y)) PI))))) (+ (* (/ (pow 0 3) 6)) (* (/ (pow 0 1) 1) (/ (pow 0 1) 1)) (* (/ (pow 0 1) 1)))) into 0
* [misc]backup-simplify:  Simplify (+ (* (acos (/ 1 v2_y)) 0) (+ (* 0 0) (+ (* 0 0) (* 0 180)))) into 0
* [misc]backup-simplify:  Simplify (- (/ 0 PI) (+ (* (* 180 (/ (acos (/ 1 v2_y)) PI)) (/ 0 PI)) (* 0 (/ 0 PI)) (* 0 (/ 0 PI)))) into 0
* [misc]backup-simplify:  Simplify (/ (+ (* 2 (/ (* (pow (* 1 0) 3)) (pow (* 180 (/ (acos (/ 1 v2_y)) PI)) 3))) (* -3 (/ (* (pow (* 1 0) 1) (pow (* 2 0) 1)) (pow (* 180 (/ (acos (/ 1 v2_y)) PI)) 2))) (* 1 (/ (* 1 1 (pow (* 6 0) 1)) (pow (* 180 (/ (acos (/ 1 v2_y)) PI)) 1)))) 6) into 0
* [misc]backup-simplify:  Simplify (+ (* 1/3 0) (+ (* 0 0) (+ (* 0 0) (* 0 (log (* 180 (/ (acos (/ 1 v2_y)) PI))))))) into 0
* [misc]backup-simplify:  Simplify (* (exp (* 1/3 (log (* 180 (/ (acos (/ 1 v2_y)) PI))))) (+ (* (/ (pow 0 3) 6)) (* (/ (pow 0 1) 1) (/ (pow 0 1) 1)) (* (/ (pow 0 1) 1)))) into 0
* [misc]backup-simplify:  Simplify (+ (* (pow (* 180 (/ (acos (/ 1 v2_y)) PI)) 1/3) 0) (+ (* 0 0) (+ (* 0 0) (* 0 (pow (* 180 (/ (acos (/ 1 v2_y)) PI)) 1/3))))) into 0
* [misc]backup-simplify:  Simplify 0 into 0
* [misc]backup-simplify:  Simplify (+ (* (acos (/ 1 v2_y)) 0) (+ (* 0 0) (+ (* 0 0) (+ (* 0 0) (* 0 180))))) into 0
* [misc]backup-simplify:  Simplify (- (/ 0 PI) (+ (* (* 180 (/ (acos (/ 1 v2_y)) PI)) (/ 0 PI)) (* 0 (/ 0 PI)) (* 0 (/ 0 PI)) (* 0 (/ 0 PI)))) into 0
* [misc]backup-simplify:  Simplify (/ (+ (* -6 (/ (* (pow (* 1 0) 4)) (pow (* 180 (/ (acos (/ 1 v2_y)) PI)) 4))) (* 12 (/ (* (pow (* 1 0) 2) (pow (* 2 0) 1)) (pow (* 180 (/ (acos (/ 1 v2_y)) PI)) 3))) (* -3 (/ (* 1 (pow (* 2 0) 2)) (pow (* 180 (/ (acos (/ 1 v2_y)) PI)) 2))) (* -4 (/ (* (pow (* 1 0) 1) 1 (pow (* 6 0) 1)) (pow (* 180 (/ (acos (/ 1 v2_y)) PI)) 2))) (* 1 (/ (* 1 1 1 (pow (* 24 0) 1)) (pow (* 180 (/ (acos (/ 1 v2_y)) PI)) 1)))) 24) into 0
* [misc]backup-simplify:  Simplify (+ (* 1/3 0) (+ (* 0 0) (+ (* 0 0) (+ (* 0 0) (* 0 (log (* 180 (/ (acos (/ 1 v2_y)) PI)))))))) into 0
* [misc]backup-simplify:  Simplify (* (exp (* 1/3 (log (* 180 (/ (acos (/ 1 v2_y)) PI))))) (+ (* (/ (pow 0 4) 24)) (* (/ (pow 0 2) 2) (/ (pow 0 1) 1)) (* (/ (pow 0 1) 1) (/ (pow 0 1) 1)) (* (/ (pow 0 2) 2)) (* (/ (pow 0 1) 1)))) into 0
* [misc]backup-simplify:  Simplify (+ (* (acos (/ 1 v2_y)) 0) (+ (* 0 0) (+ (* 0 0) (+ (* 0 0) (* 0 180))))) into 0
* [misc]backup-simplify:  Simplify (- (/ 0 PI) (+ (* (* 180 (/ (acos (/ 1 v2_y)) PI)) (/ 0 PI)) (* 0 (/ 0 PI)) (* 0 (/ 0 PI)) (* 0 (/ 0 PI)))) into 0
* [misc]backup-simplify:  Simplify (/ (+ (* -6 (/ (* (pow (* 1 0) 4)) (pow (* 180 (/ (acos (/ 1 v2_y)) PI)) 4))) (* 12 (/ (* (pow (* 1 0) 2) (pow (* 2 0) 1)) (pow (* 180 (/ (acos (/ 1 v2_y)) PI)) 3))) (* -3 (/ (* 1 (pow (* 2 0) 2)) (pow (* 180 (/ (acos (/ 1 v2_y)) PI)) 2))) (* -4 (/ (* (pow (* 1 0) 1) 1 (pow (* 6 0) 1)) (pow (* 180 (/ (acos (/ 1 v2_y)) PI)) 2))) (* 1 (/ (* 1 1 1 (pow (* 24 0) 1)) (pow (* 180 (/ (acos (/ 1 v2_y)) PI)) 1)))) 24) into 0
* [misc]backup-simplify:  Simplify (+ (* 1/3 0) (+ (* 0 0) (+ (* 0 0) (+ (* 0 0) (* 0 (log (* 180 (/ (acos (/ 1 v2_y)) PI)))))))) into 0
* [misc]backup-simplify:  Simplify (* (exp (* 1/3 (log (* 180 (/ (acos (/ 1 v2_y)) PI))))) (+ (* (/ (pow 0 4) 24)) (* (/ (pow 0 2) 2) (/ (pow 0 1) 1)) (* (/ (pow 0 1) 1) (/ (pow 0 1) 1)) (* (/ (pow 0 2) 2)) (* (/ (pow 0 1) 1)))) into 0
* [misc]backup-simplify:  Simplify (+ (* (pow (* 180 (/ (acos (/ 1 v2_y)) PI)) 1/3) 0) (+ (* 0 0) (+ (* 0 0) (+ (* 0 0) (* 0 (pow (* 180 (/ (acos (/ 1 v2_y)) PI)) 1/3)))))) into 0
* [misc]backup-simplify:  Simplify 0 into 0
* [misc]backup-simplify:  Simplify (+ (* (acos (/ 1 v2_y)) 0) (+ (* 0 0) (+ (* 0 0) (+ (* 0 0) (+ (* 0 0) (* 0 180)))))) into 0
* [misc]backup-simplify:  Simplify (- (/ 0 PI) (+ (* (* 180 (/ (acos (/ 1 v2_y)) PI)) (/ 0 PI)) (* 0 (/ 0 PI)) (* 0 (/ 0 PI)) (* 0 (/ 0 PI)) (* 0 (/ 0 PI)))) into 0
* [misc]backup-simplify:  Simplify (/ (+ (* 24 (/ (* (pow (* 1 0) 5)) (pow (* 180 (/ (acos (/ 1 v2_y)) PI)) 5))) (* -60 (/ (* (pow (* 1 0) 3) (pow (* 2 0) 1)) (pow (* 180 (/ (acos (/ 1 v2_y)) PI)) 4))) (* 30 (/ (* (pow (* 1 0) 1) (pow (* 2 0) 2)) (pow (* 180 (/ (acos (/ 1 v2_y)) PI)) 3))) (* 20 (/ (* (pow (* 1 0) 2) 1 (pow (* 6 0) 1)) (pow (* 180 (/ (acos (/ 1 v2_y)) PI)) 3))) (* -10 (/ (* 1 (pow (* 2 0) 1) (pow (* 6 0) 1)) (pow (* 180 (/ (acos (/ 1 v2_y)) PI)) 2))) (* -5 (/ (* (pow (* 1 0) 1) 1 1 (pow (* 24 0) 1)) (pow (* 180 (/ (acos (/ 1 v2_y)) PI)) 2))) (* 1 (/ (* 1 1 1 1 (pow (* 120 0) 1)) (pow (* 180 (/ (acos (/ 1 v2_y)) PI)) 1)))) 120) into 0
* [misc]backup-simplify:  Simplify (+ (* 1/3 0) (+ (* 0 0) (+ (* 0 0) (+ (* 0 0) (+ (* 0 0) (* 0 (log (* 180 (/ (acos (/ 1 v2_y)) PI))))))))) into 0
* [misc]backup-simplify:  Simplify (* (exp (* 1/3 (log (* 180 (/ (acos (/ 1 v2_y)) PI))))) (+ (* (/ (pow 0 5) 120)) (* (/ (pow 0 3) 6) (/ (pow 0 1) 1)) (* (/ (pow 0 2) 2) (/ (pow 0 1) 1)) (* (/ (pow 0 1) 1) (/ (pow 0 2) 2)) (* (/ (pow 0 1) 1) (/ (pow 0 1) 1)) (* (/ (pow 0 1) 1) (/ (pow 0 1) 1)) (* (/ (pow 0 1) 1)))) into 0
* [misc]backup-simplify:  Simplify (+ (* (acos (/ 1 v2_y)) 0) (+ (* 0 0) (+ (* 0 0) (+ (* 0 0) (+ (* 0 0) (* 0 180)))))) into 0
* [misc]backup-simplify:  Simplify (- (/ 0 PI) (+ (* (* 180 (/ (acos (/ 1 v2_y)) PI)) (/ 0 PI)) (* 0 (/ 0 PI)) (* 0 (/ 0 PI)) (* 0 (/ 0 PI)) (* 0 (/ 0 PI)))) into 0
* [misc]backup-simplify:  Simplify (/ (+ (* 24 (/ (* (pow (* 1 0) 5)) (pow (* 180 (/ (acos (/ 1 v2_y)) PI)) 5))) (* -60 (/ (* (pow (* 1 0) 3) (pow (* 2 0) 1)) (pow (* 180 (/ (acos (/ 1 v2_y)) PI)) 4))) (* 30 (/ (* (pow (* 1 0) 1) (pow (* 2 0) 2)) (pow (* 180 (/ (acos (/ 1 v2_y)) PI)) 3))) (* 20 (/ (* (pow (* 1 0) 2) 1 (pow (* 6 0) 1)) (pow (* 180 (/ (acos (/ 1 v2_y)) PI)) 3))) (* -10 (/ (* 1 (pow (* 2 0) 1) (pow (* 6 0) 1)) (pow (* 180 (/ (acos (/ 1 v2_y)) PI)) 2))) (* -5 (/ (* (pow (* 1 0) 1) 1 1 (pow (* 24 0) 1)) (pow (* 180 (/ (acos (/ 1 v2_y)) PI)) 2))) (* 1 (/ (* 1 1 1 1 (pow (* 120 0) 1)) (pow (* 180 (/ (acos (/ 1 v2_y)) PI)) 1)))) 120) into 0
* [misc]backup-simplify:  Simplify (+ (* 1/3 0) (+ (* 0 0) (+ (* 0 0) (+ (* 0 0) (+ (* 0 0) (* 0 (log (* 180 (/ (acos (/ 1 v2_y)) PI))))))))) into 0
* [misc]backup-simplify:  Simplify (* (exp (* 1/3 (log (* 180 (/ (acos (/ 1 v2_y)) PI))))) (+ (* (/ (pow 0 5) 120)) (* (/ (pow 0 3) 6) (/ (pow 0 1) 1)) (* (/ (pow 0 2) 2) (/ (pow 0 1) 1)) (* (/ (pow 0 1) 1) (/ (pow 0 2) 2)) (* (/ (pow 0 1) 1) (/ (pow 0 1) 1)) (* (/ (pow 0 1) 1) (/ (pow 0 1) 1)) (* (/ (pow 0 1) 1)))) into 0
* [misc]backup-simplify:  Simplify (+ (* (pow (* 180 (/ (acos (/ 1 v2_y)) PI)) 1/3) 0) (+ (* 0 0) (+ (* 0 0) (+ (* 0 0) (+ (* 0 0) (* 0 (pow (* 180 (/ (acos (/ 1 v2_y)) PI)) 1/3))))))) into 0
* [misc]backup-simplify:  Simplify 0 into 0
* [misc]backup-simplify:  Simplify (+ (* (acos (/ 1 v2_y)) 0) (+ (* 0 0) (+ (* 0 0) (+ (* 0 0) (+ (* 0 0) (+ (* 0 0) (* 0 180))))))) into 0
* [misc]backup-simplify:  Simplify (- (/ 0 PI) (+ (* (* 180 (/ (acos (/ 1 v2_y)) PI)) (/ 0 PI)) (* 0 (/ 0 PI)) (* 0 (/ 0 PI)) (* 0 (/ 0 PI)) (* 0 (/ 0 PI)) (* 0 (/ 0 PI)))) into 0
* [misc]backup-simplify:  Simplify (/ (+ (* -120 (/ (* (pow (* 1 0) 6)) (pow (* 180 (/ (acos (/ 1 v2_y)) PI)) 6))) (* 360 (/ (* (pow (* 1 0) 4) (pow (* 2 0) 1)) (pow (* 180 (/ (acos (/ 1 v2_y)) PI)) 5))) (* -270 (/ (* (pow (* 1 0) 2) (pow (* 2 0) 2)) (pow (* 180 (/ (acos (/ 1 v2_y)) PI)) 4))) (* -120 (/ (* (pow (* 1 0) 3) 1 (pow (* 6 0) 1)) (pow (* 180 (/ (acos (/ 1 v2_y)) PI)) 4))) (* 30 (/ (* 1 (pow (* 2 0) 3)) (pow (* 180 (/ (acos (/ 1 v2_y)) PI)) 3))) (* 120 (/ (* (pow (* 1 0) 1) (pow (* 2 0) 1) (pow (* 6 0) 1)) (pow (* 180 (/ (acos (/ 1 v2_y)) PI)) 3))) (* 30 (/ (* (pow (* 1 0) 2) 1 1 (pow (* 24 0) 1)) (pow (* 180 (/ (acos (/ 1 v2_y)) PI)) 3))) (* -10 (/ (* 1 1 (pow (* 6 0) 2)) (pow (* 180 (/ (acos (/ 1 v2_y)) PI)) 2))) (* -15 (/ (* 1 (pow (* 2 0) 1) 1 (pow (* 24 0) 1)) (pow (* 180 (/ (acos (/ 1 v2_y)) PI)) 2))) (* -6 (/ (* (pow (* 1 0) 1) 1 1 1 (pow (* 120 0) 1)) (pow (* 180 (/ (acos (/ 1 v2_y)) PI)) 2))) (* 1 (/ (* 1 1 1 1 1 (pow (* 720 0) 1)) (pow (* 180 (/ (acos (/ 1 v2_y)) PI)) 1)))) 720) into 0
* [misc]backup-simplify:  Simplify (+ (* 1/3 0) (+ (* 0 0) (+ (* 0 0) (+ (* 0 0) (+ (* 0 0) (+ (* 0 0) (* 0 (log (* 180 (/ (acos (/ 1 v2_y)) PI)))))))))) into 0
* [misc]backup-simplify:  Simplify (* (exp (* 1/3 (log (* 180 (/ (acos (/ 1 v2_y)) PI))))) (+ (* (/ (pow 0 6) 720)) (* (/ (pow 0 4) 24) (/ (pow 0 1) 1)) (* (/ (pow 0 3) 6) (/ (pow 0 1) 1)) (* (/ (pow 0 2) 2) (/ (pow 0 2) 2)) (* (/ (pow 0 2) 2) (/ (pow 0 1) 1)) (* (/ (pow 0 1) 1) (/ (pow 0 1) 1) (/ (pow 0 1) 1)) (* (/ (pow 0 1) 1) (/ (pow 0 1) 1)) (* (/ (pow 0 3) 6)) (* (/ (pow 0 1) 1) (/ (pow 0 1) 1)) (* (/ (pow 0 2) 2)) (* (/ (pow 0 1) 1)))) into 0
* [misc]backup-simplify:  Simplify (+ (* (acos (/ 1 v2_y)) 0) (+ (* 0 0) (+ (* 0 0) (+ (* 0 0) (+ (* 0 0) (+ (* 0 0) (* 0 180))))))) into 0
* [misc]backup-simplify:  Simplify (- (/ 0 PI) (+ (* (* 180 (/ (acos (/ 1 v2_y)) PI)) (/ 0 PI)) (* 0 (/ 0 PI)) (* 0 (/ 0 PI)) (* 0 (/ 0 PI)) (* 0 (/ 0 PI)) (* 0 (/ 0 PI)))) into 0
* [misc]backup-simplify:  Simplify (/ (+ (* -120 (/ (* (pow (* 1 0) 6)) (pow (* 180 (/ (acos (/ 1 v2_y)) PI)) 6))) (* 360 (/ (* (pow (* 1 0) 4) (pow (* 2 0) 1)) (pow (* 180 (/ (acos (/ 1 v2_y)) PI)) 5))) (* -270 (/ (* (pow (* 1 0) 2) (pow (* 2 0) 2)) (pow (* 180 (/ (acos (/ 1 v2_y)) PI)) 4))) (* -120 (/ (* (pow (* 1 0) 3) 1 (pow (* 6 0) 1)) (pow (* 180 (/ (acos (/ 1 v2_y)) PI)) 4))) (* 30 (/ (* 1 (pow (* 2 0) 3)) (pow (* 180 (/ (acos (/ 1 v2_y)) PI)) 3))) (* 120 (/ (* (pow (* 1 0) 1) (pow (* 2 0) 1) (pow (* 6 0) 1)) (pow (* 180 (/ (acos (/ 1 v2_y)) PI)) 3))) (* 30 (/ (* (pow (* 1 0) 2) 1 1 (pow (* 24 0) 1)) (pow (* 180 (/ (acos (/ 1 v2_y)) PI)) 3))) (* -10 (/ (* 1 1 (pow (* 6 0) 2)) (pow (* 180 (/ (acos (/ 1 v2_y)) PI)) 2))) (* -15 (/ (* 1 (pow (* 2 0) 1) 1 (pow (* 24 0) 1)) (pow (* 180 (/ (acos (/ 1 v2_y)) PI)) 2))) (* -6 (/ (* (pow (* 1 0) 1) 1 1 1 (pow (* 120 0) 1)) (pow (* 180 (/ (acos (/ 1 v2_y)) PI)) 2))) (* 1 (/ (* 1 1 1 1 1 (pow (* 720 0) 1)) (pow (* 180 (/ (acos (/ 1 v2_y)) PI)) 1)))) 720) into 0
* [misc]backup-simplify:  Simplify (+ (* 1/3 0) (+ (* 0 0) (+ (* 0 0) (+ (* 0 0) (+ (* 0 0) (+ (* 0 0) (* 0 (log (* 180 (/ (acos (/ 1 v2_y)) PI)))))))))) into 0
* [misc]backup-simplify:  Simplify (* (exp (* 1/3 (log (* 180 (/ (acos (/ 1 v2_y)) PI))))) (+ (* (/ (pow 0 6) 720)) (* (/ (pow 0 4) 24) (/ (pow 0 1) 1)) (* (/ (pow 0 3) 6) (/ (pow 0 1) 1)) (* (/ (pow 0 2) 2) (/ (pow 0 2) 2)) (* (/ (pow 0 2) 2) (/ (pow 0 1) 1)) (* (/ (pow 0 1) 1) (/ (pow 0 1) 1) (/ (pow 0 1) 1)) (* (/ (pow 0 1) 1) (/ (pow 0 1) 1)) (* (/ (pow 0 3) 6)) (* (/ (pow 0 1) 1) (/ (pow 0 1) 1)) (* (/ (pow 0 2) 2)) (* (/ (pow 0 1) 1)))) into 0
* [misc]backup-simplify:  Simplify (+ (* (pow (* 180 (/ (acos (/ 1 v2_y)) PI)) 1/3) 0) (+ (* 0 0) (+ (* 0 0) (+ (* 0 0) (+ (* 0 0) (+ (* 0 0) (* 0 (pow (* 180 (/ (acos (/ 1 v2_y)) PI)) 1/3)))))))) into 0
* [misc]backup-simplify:  Simplify 0 into 0
* [misc]backup-simplify:  Simplify (pow (* 32400 (/ (pow (acos (/ 1 (/ 1 v2_y))) 2) (pow PI 2))) 1/3) into (pow (* 32400 (/ (pow (acos v2_y) 2) (pow PI 2))) 1/3)
* [misc]approximate:  Taking taylor expansion of (* (cbrt (/ (* (acos (/ 1 (- v2_y))) 180) PI)) (cbrt (/ (* (acos (/ 1 (- v2_y))) 180) PI))) in (v2_y) around 0
* [misc]taylor:  Taking taylor expansion of (* (cbrt (/ (* (acos (/ 1 (- v2_y))) 180) PI)) (cbrt (/ (* (acos (/ 1 (- v2_y))) 180) PI))) in v2_y
* [misc]taylor:  Taking taylor expansion of (cbrt (/ (* (acos (/ 1 (- v2_y))) 180) PI)) in v2_y
* [misc]taylor:  Rewrote expression to (pow (/ (* (acos (/ 1 (- v2_y))) 180) PI) 1/3)
* [misc]taylor:  Taking taylor expansion of (exp (* 1/3 (log (/ (* (acos (/ 1 (- v2_y))) 180) PI)))) in v2_y
* [misc]taylor:  Taking taylor expansion of (* 1/3 (log (/ (* (acos (/ 1 (- v2_y))) 180) PI))) in v2_y
* [misc]taylor:  Taking taylor expansion of 1/3 in v2_y
* [misc]backup-simplify:  Simplify 1/3 into 1/3
* [misc]taylor:  Taking taylor expansion of (log (/ (* (acos (/ 1 (- v2_y))) 180) PI)) in v2_y
* [misc]taylor:  Taking taylor expansion of (/ (* (acos (/ 1 (- v2_y))) 180) PI) in v2_y
* [misc]taylor:  Taking taylor expansion of (* (acos (/ 1 (- v2_y))) 180) in v2_y
* [misc]taylor:  Taking taylor expansion of (acos (/ 1 (- v2_y))) in v2_y
* [misc]backup-simplify:  Simplify (acos (/ 1 (- v2_y))) into (acos (/ -1 v2_y))
* [misc]taylor:  Taking taylor expansion of 180 in v2_y
* [misc]backup-simplify:  Simplify 180 into 180
* [misc]taylor:  Taking taylor expansion of PI in v2_y
* [misc]backup-simplify:  Simplify PI into PI
* [misc]backup-simplify:  Simplify (* (acos (/ -1 v2_y)) 180) into (* 180 (acos (/ -1 v2_y)))
* [misc]backup-simplify:  Simplify (/ (* 180 (acos (/ -1 v2_y))) PI) into (* 180 (/ (acos (/ -1 v2_y)) PI))
* [misc]backup-simplify:  Simplify (log (* 180 (/ (acos (/ -1 v2_y)) PI))) into (log (* 180 (/ (acos (/ -1 v2_y)) PI)))
* [misc]backup-simplify:  Simplify (* 1/3 (log (* 180 (/ (acos (/ -1 v2_y)) PI)))) into (* 1/3 (log (* 180 (/ (acos (/ -1 v2_y)) PI))))
* [misc]backup-simplify:  Simplify (exp (* 1/3 (log (* 180 (/ (acos (/ -1 v2_y)) PI))))) into (pow (* 180 (/ (acos (/ -1 v2_y)) PI)) 1/3)
* [misc]taylor:  Taking taylor expansion of (cbrt (/ (* (acos (/ 1 (- v2_y))) 180) PI)) in v2_y
* [misc]taylor:  Rewrote expression to (pow (/ (* (acos (/ 1 (- v2_y))) 180) PI) 1/3)
* [misc]taylor:  Taking taylor expansion of (exp (* 1/3 (log (/ (* (acos (/ 1 (- v2_y))) 180) PI)))) in v2_y
* [misc]taylor:  Taking taylor expansion of (* 1/3 (log (/ (* (acos (/ 1 (- v2_y))) 180) PI))) in v2_y
* [misc]taylor:  Taking taylor expansion of 1/3 in v2_y
* [misc]backup-simplify:  Simplify 1/3 into 1/3
* [misc]taylor:  Taking taylor expansion of (log (/ (* (acos (/ 1 (- v2_y))) 180) PI)) in v2_y
* [misc]taylor:  Taking taylor expansion of (/ (* (acos (/ 1 (- v2_y))) 180) PI) in v2_y
* [misc]taylor:  Taking taylor expansion of (* (acos (/ 1 (- v2_y))) 180) in v2_y
* [misc]taylor:  Taking taylor expansion of (acos (/ 1 (- v2_y))) in v2_y
* [misc]backup-simplify:  Simplify (acos (/ 1 (- v2_y))) into (acos (/ -1 v2_y))
* [misc]taylor:  Taking taylor expansion of 180 in v2_y
* [misc]backup-simplify:  Simplify 180 into 180
* [misc]taylor:  Taking taylor expansion of PI in v2_y
* [misc]backup-simplify:  Simplify PI into PI
* [misc]backup-simplify:  Simplify (* (acos (/ -1 v2_y)) 180) into (* 180 (acos (/ -1 v2_y)))
* [misc]backup-simplify:  Simplify (/ (* 180 (acos (/ -1 v2_y))) PI) into (* 180 (/ (acos (/ -1 v2_y)) PI))
* [misc]backup-simplify:  Simplify (log (* 180 (/ (acos (/ -1 v2_y)) PI))) into (log (* 180 (/ (acos (/ -1 v2_y)) PI)))
* [misc]backup-simplify:  Simplify (* 1/3 (log (* 180 (/ (acos (/ -1 v2_y)) PI)))) into (* 1/3 (log (* 180 (/ (acos (/ -1 v2_y)) PI))))
* [misc]backup-simplify:  Simplify (exp (* 1/3 (log (* 180 (/ (acos (/ -1 v2_y)) PI))))) into (pow (* 180 (/ (acos (/ -1 v2_y)) PI)) 1/3)
* [misc]taylor:  Taking taylor expansion of (* (cbrt (/ (* (acos (/ 1 (- v2_y))) 180) PI)) (cbrt (/ (* (acos (/ 1 (- v2_y))) 180) PI))) in v2_y
* [misc]taylor:  Taking taylor expansion of (cbrt (/ (* (acos (/ 1 (- v2_y))) 180) PI)) in v2_y
* [misc]taylor:  Rewrote expression to (pow (/ (* (acos (/ 1 (- v2_y))) 180) PI) 1/3)
* [misc]taylor:  Taking taylor expansion of (exp (* 1/3 (log (/ (* (acos (/ 1 (- v2_y))) 180) PI)))) in v2_y
* [misc]taylor:  Taking taylor expansion of (* 1/3 (log (/ (* (acos (/ 1 (- v2_y))) 180) PI))) in v2_y
* [misc]taylor:  Taking taylor expansion of 1/3 in v2_y
* [misc]backup-simplify:  Simplify 1/3 into 1/3
* [misc]taylor:  Taking taylor expansion of (log (/ (* (acos (/ 1 (- v2_y))) 180) PI)) in v2_y
* [misc]taylor:  Taking taylor expansion of (/ (* (acos (/ 1 (- v2_y))) 180) PI) in v2_y
* [misc]taylor:  Taking taylor expansion of (* (acos (/ 1 (- v2_y))) 180) in v2_y
* [misc]taylor:  Taking taylor expansion of (acos (/ 1 (- v2_y))) in v2_y
* [misc]backup-simplify:  Simplify (acos (/ 1 (- v2_y))) into (acos (/ -1 v2_y))
* [misc]taylor:  Taking taylor expansion of 180 in v2_y
* [misc]backup-simplify:  Simplify 180 into 180
* [misc]taylor:  Taking taylor expansion of PI in v2_y
* [misc]backup-simplify:  Simplify PI into PI
* [misc]backup-simplify:  Simplify (* (acos (/ -1 v2_y)) 180) into (* 180 (acos (/ -1 v2_y)))
* [misc]backup-simplify:  Simplify (/ (* 180 (acos (/ -1 v2_y))) PI) into (* 180 (/ (acos (/ -1 v2_y)) PI))
* [misc]backup-simplify:  Simplify (log (* 180 (/ (acos (/ -1 v2_y)) PI))) into (log (* 180 (/ (acos (/ -1 v2_y)) PI)))
* [misc]backup-simplify:  Simplify (* 1/3 (log (* 180 (/ (acos (/ -1 v2_y)) PI)))) into (* 1/3 (log (* 180 (/ (acos (/ -1 v2_y)) PI))))
* [misc]backup-simplify:  Simplify (exp (* 1/3 (log (* 180 (/ (acos (/ -1 v2_y)) PI))))) into (pow (* 180 (/ (acos (/ -1 v2_y)) PI)) 1/3)
* [misc]taylor:  Taking taylor expansion of (cbrt (/ (* (acos (/ 1 (- v2_y))) 180) PI)) in v2_y
* [misc]taylor:  Rewrote expression to (pow (/ (* (acos (/ 1 (- v2_y))) 180) PI) 1/3)
* [misc]taylor:  Taking taylor expansion of (exp (* 1/3 (log (/ (* (acos (/ 1 (- v2_y))) 180) PI)))) in v2_y
* [misc]taylor:  Taking taylor expansion of (* 1/3 (log (/ (* (acos (/ 1 (- v2_y))) 180) PI))) in v2_y
* [misc]taylor:  Taking taylor expansion of 1/3 in v2_y
* [misc]backup-simplify:  Simplify 1/3 into 1/3
* [misc]taylor:  Taking taylor expansion of (log (/ (* (acos (/ 1 (- v2_y))) 180) PI)) in v2_y
* [misc]taylor:  Taking taylor expansion of (/ (* (acos (/ 1 (- v2_y))) 180) PI) in v2_y
* [misc]taylor:  Taking taylor expansion of (* (acos (/ 1 (- v2_y))) 180) in v2_y
* [misc]taylor:  Taking taylor expansion of (acos (/ 1 (- v2_y))) in v2_y
* [misc]backup-simplify:  Simplify (acos (/ 1 (- v2_y))) into (acos (/ -1 v2_y))
* [misc]taylor:  Taking taylor expansion of 180 in v2_y
* [misc]backup-simplify:  Simplify 180 into 180
* [misc]taylor:  Taking taylor expansion of PI in v2_y
* [misc]backup-simplify:  Simplify PI into PI
* [misc]backup-simplify:  Simplify (* (acos (/ -1 v2_y)) 180) into (* 180 (acos (/ -1 v2_y)))
* [misc]backup-simplify:  Simplify (/ (* 180 (acos (/ -1 v2_y))) PI) into (* 180 (/ (acos (/ -1 v2_y)) PI))
* [misc]backup-simplify:  Simplify (log (* 180 (/ (acos (/ -1 v2_y)) PI))) into (log (* 180 (/ (acos (/ -1 v2_y)) PI)))
* [misc]backup-simplify:  Simplify (* 1/3 (log (* 180 (/ (acos (/ -1 v2_y)) PI)))) into (* 1/3 (log (* 180 (/ (acos (/ -1 v2_y)) PI))))
* [misc]backup-simplify:  Simplify (exp (* 1/3 (log (* 180 (/ (acos (/ -1 v2_y)) PI))))) into (pow (* 180 (/ (acos (/ -1 v2_y)) PI)) 1/3)
* [misc]backup-simplify:  Simplify (* (pow (* 180 (/ (acos (/ -1 v2_y)) PI)) 1/3) (pow (* 180 (/ (acos (/ -1 v2_y)) PI)) 1/3)) into (pow (/ (* (pow (acos (/ -1 v2_y)) 2) (pow 180 2)) (pow PI 2)) 1/3)
* [misc]backup-simplify:  Simplify (pow (/ (* (pow (acos (/ -1 v2_y)) 2) (pow 180 2)) (pow PI 2)) 1/3) into (pow (* 32400 (/ (pow (acos (/ -1 v2_y)) 2) (pow PI 2))) 1/3)
* [misc]backup-simplify:  Simplify (+ (* (acos (/ -1 v2_y)) 0) (* 0 180)) into 0
* [misc]backup-simplify:  Simplify (- (/ 0 PI) (+ (* (* 180 (/ (acos (/ -1 v2_y)) PI)) (/ 0 PI)))) into 0
* [misc]backup-simplify:  Simplify (/ (+ (* 1 (/ (* (pow (* 1 0) 1)) (pow (* 180 (/ (acos (/ -1 v2_y)) PI)) 1)))) 1) into 0
* [misc]backup-simplify:  Simplify (+ (* 1/3 0) (* 0 (log (* 180 (/ (acos (/ -1 v2_y)) PI))))) into 0
* [misc]backup-simplify:  Simplify (* (exp (* 1/3 (log (* 180 (/ (acos (/ -1 v2_y)) PI))))) (+ (* (/ (pow 0 1) 1)))) into 0
* [misc]backup-simplify:  Simplify (+ (* (acos (/ -1 v2_y)) 0) (* 0 180)) into 0
* [misc]backup-simplify:  Simplify (- (/ 0 PI) (+ (* (* 180 (/ (acos (/ -1 v2_y)) PI)) (/ 0 PI)))) into 0
* [misc]backup-simplify:  Simplify (/ (+ (* 1 (/ (* (pow (* 1 0) 1)) (pow (* 180 (/ (acos (/ -1 v2_y)) PI)) 1)))) 1) into 0
* [misc]backup-simplify:  Simplify (+ (* 1/3 0) (* 0 (log (* 180 (/ (acos (/ -1 v2_y)) PI))))) into 0
* [misc]backup-simplify:  Simplify (* (exp (* 1/3 (log (* 180 (/ (acos (/ -1 v2_y)) PI))))) (+ (* (/ (pow 0 1) 1)))) into 0
* [misc]backup-simplify:  Simplify (+ (* (pow (* 180 (/ (acos (/ -1 v2_y)) PI)) 1/3) 0) (* 0 (pow (* 180 (/ (acos (/ -1 v2_y)) PI)) 1/3))) into 0
* [misc]backup-simplify:  Simplify 0 into 0
* [misc]backup-simplify:  Simplify (+ (* (acos (/ -1 v2_y)) 0) (+ (* 0 0) (* 0 180))) into 0
* [misc]backup-simplify:  Simplify (- (/ 0 PI) (+ (* (* 180 (/ (acos (/ -1 v2_y)) PI)) (/ 0 PI)) (* 0 (/ 0 PI)))) into 0
* [misc]backup-simplify:  Simplify (/ (+ (* -1 (/ (* (pow (* 1 0) 2)) (pow (* 180 (/ (acos (/ -1 v2_y)) PI)) 2))) (* 1 (/ (* 1 (pow (* 2 0) 1)) (pow (* 180 (/ (acos (/ -1 v2_y)) PI)) 1)))) 2) into 0
* [misc]backup-simplify:  Simplify (+ (* 1/3 0) (+ (* 0 0) (* 0 (log (* 180 (/ (acos (/ -1 v2_y)) PI)))))) into 0
* [misc]backup-simplify:  Simplify (* (exp (* 1/3 (log (* 180 (/ (acos (/ -1 v2_y)) PI))))) (+ (* (/ (pow 0 2) 2)) (* (/ (pow 0 1) 1)))) into 0
* [misc]backup-simplify:  Simplify (+ (* (acos (/ -1 v2_y)) 0) (+ (* 0 0) (* 0 180))) into 0
* [misc]backup-simplify:  Simplify (- (/ 0 PI) (+ (* (* 180 (/ (acos (/ -1 v2_y)) PI)) (/ 0 PI)) (* 0 (/ 0 PI)))) into 0
* [misc]backup-simplify:  Simplify (/ (+ (* -1 (/ (* (pow (* 1 0) 2)) (pow (* 180 (/ (acos (/ -1 v2_y)) PI)) 2))) (* 1 (/ (* 1 (pow (* 2 0) 1)) (pow (* 180 (/ (acos (/ -1 v2_y)) PI)) 1)))) 2) into 0
* [misc]backup-simplify:  Simplify (+ (* 1/3 0) (+ (* 0 0) (* 0 (log (* 180 (/ (acos (/ -1 v2_y)) PI)))))) into 0
* [misc]backup-simplify:  Simplify (* (exp (* 1/3 (log (* 180 (/ (acos (/ -1 v2_y)) PI))))) (+ (* (/ (pow 0 2) 2)) (* (/ (pow 0 1) 1)))) into 0
* [misc]backup-simplify:  Simplify (+ (* (pow (* 180 (/ (acos (/ -1 v2_y)) PI)) 1/3) 0) (+ (* 0 0) (* 0 (pow (* 180 (/ (acos (/ -1 v2_y)) PI)) 1/3)))) into 0
* [misc]backup-simplify:  Simplify 0 into 0
* [misc]backup-simplify:  Simplify (+ (* (acos (/ -1 v2_y)) 0) (+ (* 0 0) (+ (* 0 0) (* 0 180)))) into 0
* [misc]backup-simplify:  Simplify (- (/ 0 PI) (+ (* (* 180 (/ (acos (/ -1 v2_y)) PI)) (/ 0 PI)) (* 0 (/ 0 PI)) (* 0 (/ 0 PI)))) into 0
* [misc]backup-simplify:  Simplify (/ (+ (* 2 (/ (* (pow (* 1 0) 3)) (pow (* 180 (/ (acos (/ -1 v2_y)) PI)) 3))) (* -3 (/ (* (pow (* 1 0) 1) (pow (* 2 0) 1)) (pow (* 180 (/ (acos (/ -1 v2_y)) PI)) 2))) (* 1 (/ (* 1 1 (pow (* 6 0) 1)) (pow (* 180 (/ (acos (/ -1 v2_y)) PI)) 1)))) 6) into 0
* [misc]backup-simplify:  Simplify (+ (* 1/3 0) (+ (* 0 0) (+ (* 0 0) (* 0 (log (* 180 (/ (acos (/ -1 v2_y)) PI))))))) into 0
* [misc]backup-simplify:  Simplify (* (exp (* 1/3 (log (* 180 (/ (acos (/ -1 v2_y)) PI))))) (+ (* (/ (pow 0 3) 6)) (* (/ (pow 0 1) 1) (/ (pow 0 1) 1)) (* (/ (pow 0 1) 1)))) into 0
* [misc]backup-simplify:  Simplify (+ (* (acos (/ -1 v2_y)) 0) (+ (* 0 0) (+ (* 0 0) (* 0 180)))) into 0
* [misc]backup-simplify:  Simplify (- (/ 0 PI) (+ (* (* 180 (/ (acos (/ -1 v2_y)) PI)) (/ 0 PI)) (* 0 (/ 0 PI)) (* 0 (/ 0 PI)))) into 0
* [misc]backup-simplify:  Simplify (/ (+ (* 2 (/ (* (pow (* 1 0) 3)) (pow (* 180 (/ (acos (/ -1 v2_y)) PI)) 3))) (* -3 (/ (* (pow (* 1 0) 1) (pow (* 2 0) 1)) (pow (* 180 (/ (acos (/ -1 v2_y)) PI)) 2))) (* 1 (/ (* 1 1 (pow (* 6 0) 1)) (pow (* 180 (/ (acos (/ -1 v2_y)) PI)) 1)))) 6) into 0
* [misc]backup-simplify:  Simplify (+ (* 1/3 0) (+ (* 0 0) (+ (* 0 0) (* 0 (log (* 180 (/ (acos (/ -1 v2_y)) PI))))))) into 0
* [misc]backup-simplify:  Simplify (* (exp (* 1/3 (log (* 180 (/ (acos (/ -1 v2_y)) PI))))) (+ (* (/ (pow 0 3) 6)) (* (/ (pow 0 1) 1) (/ (pow 0 1) 1)) (* (/ (pow 0 1) 1)))) into 0
* [misc]backup-simplify:  Simplify (+ (* (pow (* 180 (/ (acos (/ -1 v2_y)) PI)) 1/3) 0) (+ (* 0 0) (+ (* 0 0) (* 0 (pow (* 180 (/ (acos (/ -1 v2_y)) PI)) 1/3))))) into 0
* [misc]backup-simplify:  Simplify 0 into 0
* [misc]backup-simplify:  Simplify (+ (* (acos (/ -1 v2_y)) 0) (+ (* 0 0) (+ (* 0 0) (+ (* 0 0) (* 0 180))))) into 0
* [misc]backup-simplify:  Simplify (- (/ 0 PI) (+ (* (* 180 (/ (acos (/ -1 v2_y)) PI)) (/ 0 PI)) (* 0 (/ 0 PI)) (* 0 (/ 0 PI)) (* 0 (/ 0 PI)))) into 0
* [misc]backup-simplify:  Simplify (/ (+ (* -6 (/ (* (pow (* 1 0) 4)) (pow (* 180 (/ (acos (/ -1 v2_y)) PI)) 4))) (* 12 (/ (* (pow (* 1 0) 2) (pow (* 2 0) 1)) (pow (* 180 (/ (acos (/ -1 v2_y)) PI)) 3))) (* -3 (/ (* 1 (pow (* 2 0) 2)) (pow (* 180 (/ (acos (/ -1 v2_y)) PI)) 2))) (* -4 (/ (* (pow (* 1 0) 1) 1 (pow (* 6 0) 1)) (pow (* 180 (/ (acos (/ -1 v2_y)) PI)) 2))) (* 1 (/ (* 1 1 1 (pow (* 24 0) 1)) (pow (* 180 (/ (acos (/ -1 v2_y)) PI)) 1)))) 24) into 0
* [misc]backup-simplify:  Simplify (+ (* 1/3 0) (+ (* 0 0) (+ (* 0 0) (+ (* 0 0) (* 0 (log (* 180 (/ (acos (/ -1 v2_y)) PI)))))))) into 0
* [misc]backup-simplify:  Simplify (* (exp (* 1/3 (log (* 180 (/ (acos (/ -1 v2_y)) PI))))) (+ (* (/ (pow 0 4) 24)) (* (/ (pow 0 2) 2) (/ (pow 0 1) 1)) (* (/ (pow 0 1) 1) (/ (pow 0 1) 1)) (* (/ (pow 0 2) 2)) (* (/ (pow 0 1) 1)))) into 0
* [misc]backup-simplify:  Simplify (+ (* (acos (/ -1 v2_y)) 0) (+ (* 0 0) (+ (* 0 0) (+ (* 0 0) (* 0 180))))) into 0
* [misc]backup-simplify:  Simplify (- (/ 0 PI) (+ (* (* 180 (/ (acos (/ -1 v2_y)) PI)) (/ 0 PI)) (* 0 (/ 0 PI)) (* 0 (/ 0 PI)) (* 0 (/ 0 PI)))) into 0
* [misc]backup-simplify:  Simplify (/ (+ (* -6 (/ (* (pow (* 1 0) 4)) (pow (* 180 (/ (acos (/ -1 v2_y)) PI)) 4))) (* 12 (/ (* (pow (* 1 0) 2) (pow (* 2 0) 1)) (pow (* 180 (/ (acos (/ -1 v2_y)) PI)) 3))) (* -3 (/ (* 1 (pow (* 2 0) 2)) (pow (* 180 (/ (acos (/ -1 v2_y)) PI)) 2))) (* -4 (/ (* (pow (* 1 0) 1) 1 (pow (* 6 0) 1)) (pow (* 180 (/ (acos (/ -1 v2_y)) PI)) 2))) (* 1 (/ (* 1 1 1 (pow (* 24 0) 1)) (pow (* 180 (/ (acos (/ -1 v2_y)) PI)) 1)))) 24) into 0
* [misc]backup-simplify:  Simplify (+ (* 1/3 0) (+ (* 0 0) (+ (* 0 0) (+ (* 0 0) (* 0 (log (* 180 (/ (acos (/ -1 v2_y)) PI)))))))) into 0
* [misc]backup-simplify:  Simplify (* (exp (* 1/3 (log (* 180 (/ (acos (/ -1 v2_y)) PI))))) (+ (* (/ (pow 0 4) 24)) (* (/ (pow 0 2) 2) (/ (pow 0 1) 1)) (* (/ (pow 0 1) 1) (/ (pow 0 1) 1)) (* (/ (pow 0 2) 2)) (* (/ (pow 0 1) 1)))) into 0
* [misc]backup-simplify:  Simplify (+ (* (pow (* 180 (/ (acos (/ -1 v2_y)) PI)) 1/3) 0) (+ (* 0 0) (+ (* 0 0) (+ (* 0 0) (* 0 (pow (* 180 (/ (acos (/ -1 v2_y)) PI)) 1/3)))))) into 0
* [misc]backup-simplify:  Simplify 0 into 0
* [misc]backup-simplify:  Simplify (+ (* (acos (/ -1 v2_y)) 0) (+ (* 0 0) (+ (* 0 0) (+ (* 0 0) (+ (* 0 0) (* 0 180)))))) into 0
* [misc]backup-simplify:  Simplify (- (/ 0 PI) (+ (* (* 180 (/ (acos (/ -1 v2_y)) PI)) (/ 0 PI)) (* 0 (/ 0 PI)) (* 0 (/ 0 PI)) (* 0 (/ 0 PI)) (* 0 (/ 0 PI)))) into 0
* [misc]backup-simplify:  Simplify (/ (+ (* 24 (/ (* (pow (* 1 0) 5)) (pow (* 180 (/ (acos (/ -1 v2_y)) PI)) 5))) (* -60 (/ (* (pow (* 1 0) 3) (pow (* 2 0) 1)) (pow (* 180 (/ (acos (/ -1 v2_y)) PI)) 4))) (* 30 (/ (* (pow (* 1 0) 1) (pow (* 2 0) 2)) (pow (* 180 (/ (acos (/ -1 v2_y)) PI)) 3))) (* 20 (/ (* (pow (* 1 0) 2) 1 (pow (* 6 0) 1)) (pow (* 180 (/ (acos (/ -1 v2_y)) PI)) 3))) (* -10 (/ (* 1 (pow (* 2 0) 1) (pow (* 6 0) 1)) (pow (* 180 (/ (acos (/ -1 v2_y)) PI)) 2))) (* -5 (/ (* (pow (* 1 0) 1) 1 1 (pow (* 24 0) 1)) (pow (* 180 (/ (acos (/ -1 v2_y)) PI)) 2))) (* 1 (/ (* 1 1 1 1 (pow (* 120 0) 1)) (pow (* 180 (/ (acos (/ -1 v2_y)) PI)) 1)))) 120) into 0
* [misc]backup-simplify:  Simplify (+ (* 1/3 0) (+ (* 0 0) (+ (* 0 0) (+ (* 0 0) (+ (* 0 0) (* 0 (log (* 180 (/ (acos (/ -1 v2_y)) PI))))))))) into 0
* [misc]backup-simplify:  Simplify (* (exp (* 1/3 (log (* 180 (/ (acos (/ -1 v2_y)) PI))))) (+ (* (/ (pow 0 5) 120)) (* (/ (pow 0 3) 6) (/ (pow 0 1) 1)) (* (/ (pow 0 2) 2) (/ (pow 0 1) 1)) (* (/ (pow 0 1) 1) (/ (pow 0 2) 2)) (* (/ (pow 0 1) 1) (/ (pow 0 1) 1)) (* (/ (pow 0 1) 1) (/ (pow 0 1) 1)) (* (/ (pow 0 1) 1)))) into 0
* [misc]backup-simplify:  Simplify (+ (* (acos (/ -1 v2_y)) 0) (+ (* 0 0) (+ (* 0 0) (+ (* 0 0) (+ (* 0 0) (* 0 180)))))) into 0
* [misc]backup-simplify:  Simplify (- (/ 0 PI) (+ (* (* 180 (/ (acos (/ -1 v2_y)) PI)) (/ 0 PI)) (* 0 (/ 0 PI)) (* 0 (/ 0 PI)) (* 0 (/ 0 PI)) (* 0 (/ 0 PI)))) into 0
* [misc]backup-simplify:  Simplify (/ (+ (* 24 (/ (* (pow (* 1 0) 5)) (pow (* 180 (/ (acos (/ -1 v2_y)) PI)) 5))) (* -60 (/ (* (pow (* 1 0) 3) (pow (* 2 0) 1)) (pow (* 180 (/ (acos (/ -1 v2_y)) PI)) 4))) (* 30 (/ (* (pow (* 1 0) 1) (pow (* 2 0) 2)) (pow (* 180 (/ (acos (/ -1 v2_y)) PI)) 3))) (* 20 (/ (* (pow (* 1 0) 2) 1 (pow (* 6 0) 1)) (pow (* 180 (/ (acos (/ -1 v2_y)) PI)) 3))) (* -10 (/ (* 1 (pow (* 2 0) 1) (pow (* 6 0) 1)) (pow (* 180 (/ (acos (/ -1 v2_y)) PI)) 2))) (* -5 (/ (* (pow (* 1 0) 1) 1 1 (pow (* 24 0) 1)) (pow (* 180 (/ (acos (/ -1 v2_y)) PI)) 2))) (* 1 (/ (* 1 1 1 1 (pow (* 120 0) 1)) (pow (* 180 (/ (acos (/ -1 v2_y)) PI)) 1)))) 120) into 0
* [misc]backup-simplify:  Simplify (+ (* 1/3 0) (+ (* 0 0) (+ (* 0 0) (+ (* 0 0) (+ (* 0 0) (* 0 (log (* 180 (/ (acos (/ -1 v2_y)) PI))))))))) into 0
* [misc]backup-simplify:  Simplify (* (exp (* 1/3 (log (* 180 (/ (acos (/ -1 v2_y)) PI))))) (+ (* (/ (pow 0 5) 120)) (* (/ (pow 0 3) 6) (/ (pow 0 1) 1)) (* (/ (pow 0 2) 2) (/ (pow 0 1) 1)) (* (/ (pow 0 1) 1) (/ (pow 0 2) 2)) (* (/ (pow 0 1) 1) (/ (pow 0 1) 1)) (* (/ (pow 0 1) 1) (/ (pow 0 1) 1)) (* (/ (pow 0 1) 1)))) into 0
* [misc]backup-simplify:  Simplify (+ (* (pow (* 180 (/ (acos (/ -1 v2_y)) PI)) 1/3) 0) (+ (* 0 0) (+ (* 0 0) (+ (* 0 0) (+ (* 0 0) (* 0 (pow (* 180 (/ (acos (/ -1 v2_y)) PI)) 1/3))))))) into 0
* [misc]backup-simplify:  Simplify 0 into 0
* [misc]backup-simplify:  Simplify (+ (* (acos (/ -1 v2_y)) 0) (+ (* 0 0) (+ (* 0 0) (+ (* 0 0) (+ (* 0 0) (+ (* 0 0) (* 0 180))))))) into 0
* [misc]backup-simplify:  Simplify (- (/ 0 PI) (+ (* (* 180 (/ (acos (/ -1 v2_y)) PI)) (/ 0 PI)) (* 0 (/ 0 PI)) (* 0 (/ 0 PI)) (* 0 (/ 0 PI)) (* 0 (/ 0 PI)) (* 0 (/ 0 PI)))) into 0
* [misc]backup-simplify:  Simplify (/ (+ (* -120 (/ (* (pow (* 1 0) 6)) (pow (* 180 (/ (acos (/ -1 v2_y)) PI)) 6))) (* 360 (/ (* (pow (* 1 0) 4) (pow (* 2 0) 1)) (pow (* 180 (/ (acos (/ -1 v2_y)) PI)) 5))) (* -270 (/ (* (pow (* 1 0) 2) (pow (* 2 0) 2)) (pow (* 180 (/ (acos (/ -1 v2_y)) PI)) 4))) (* -120 (/ (* (pow (* 1 0) 3) 1 (pow (* 6 0) 1)) (pow (* 180 (/ (acos (/ -1 v2_y)) PI)) 4))) (* 30 (/ (* 1 (pow (* 2 0) 3)) (pow (* 180 (/ (acos (/ -1 v2_y)) PI)) 3))) (* 120 (/ (* (pow (* 1 0) 1) (pow (* 2 0) 1) (pow (* 6 0) 1)) (pow (* 180 (/ (acos (/ -1 v2_y)) PI)) 3))) (* 30 (/ (* (pow (* 1 0) 2) 1 1 (pow (* 24 0) 1)) (pow (* 180 (/ (acos (/ -1 v2_y)) PI)) 3))) (* -10 (/ (* 1 1 (pow (* 6 0) 2)) (pow (* 180 (/ (acos (/ -1 v2_y)) PI)) 2))) (* -15 (/ (* 1 (pow (* 2 0) 1) 1 (pow (* 24 0) 1)) (pow (* 180 (/ (acos (/ -1 v2_y)) PI)) 2))) (* -6 (/ (* (pow (* 1 0) 1) 1 1 1 (pow (* 120 0) 1)) (pow (* 180 (/ (acos (/ -1 v2_y)) PI)) 2))) (* 1 (/ (* 1 1 1 1 1 (pow (* 720 0) 1)) (pow (* 180 (/ (acos (/ -1 v2_y)) PI)) 1)))) 720) into 0
* [misc]backup-simplify:  Simplify (+ (* 1/3 0) (+ (* 0 0) (+ (* 0 0) (+ (* 0 0) (+ (* 0 0) (+ (* 0 0) (* 0 (log (* 180 (/ (acos (/ -1 v2_y)) PI)))))))))) into 0
* [misc]backup-simplify:  Simplify (* (exp (* 1/3 (log (* 180 (/ (acos (/ -1 v2_y)) PI))))) (+ (* (/ (pow 0 6) 720)) (* (/ (pow 0 4) 24) (/ (pow 0 1) 1)) (* (/ (pow 0 3) 6) (/ (pow 0 1) 1)) (* (/ (pow 0 2) 2) (/ (pow 0 2) 2)) (* (/ (pow 0 2) 2) (/ (pow 0 1) 1)) (* (/ (pow 0 1) 1) (/ (pow 0 1) 1) (/ (pow 0 1) 1)) (* (/ (pow 0 1) 1) (/ (pow 0 1) 1)) (* (/ (pow 0 3) 6)) (* (/ (pow 0 1) 1) (/ (pow 0 1) 1)) (* (/ (pow 0 2) 2)) (* (/ (pow 0 1) 1)))) into 0
* [misc]backup-simplify:  Simplify (+ (* (acos (/ -1 v2_y)) 0) (+ (* 0 0) (+ (* 0 0) (+ (* 0 0) (+ (* 0 0) (+ (* 0 0) (* 0 180))))))) into 0
* [misc]backup-simplify:  Simplify (- (/ 0 PI) (+ (* (* 180 (/ (acos (/ -1 v2_y)) PI)) (/ 0 PI)) (* 0 (/ 0 PI)) (* 0 (/ 0 PI)) (* 0 (/ 0 PI)) (* 0 (/ 0 PI)) (* 0 (/ 0 PI)))) into 0
* [misc]backup-simplify:  Simplify (/ (+ (* -120 (/ (* (pow (* 1 0) 6)) (pow (* 180 (/ (acos (/ -1 v2_y)) PI)) 6))) (* 360 (/ (* (pow (* 1 0) 4) (pow (* 2 0) 1)) (pow (* 180 (/ (acos (/ -1 v2_y)) PI)) 5))) (* -270 (/ (* (pow (* 1 0) 2) (pow (* 2 0) 2)) (pow (* 180 (/ (acos (/ -1 v2_y)) PI)) 4))) (* -120 (/ (* (pow (* 1 0) 3) 1 (pow (* 6 0) 1)) (pow (* 180 (/ (acos (/ -1 v2_y)) PI)) 4))) (* 30 (/ (* 1 (pow (* 2 0) 3)) (pow (* 180 (/ (acos (/ -1 v2_y)) PI)) 3))) (* 120 (/ (* (pow (* 1 0) 1) (pow (* 2 0) 1) (pow (* 6 0) 1)) (pow (* 180 (/ (acos (/ -1 v2_y)) PI)) 3))) (* 30 (/ (* (pow (* 1 0) 2) 1 1 (pow (* 24 0) 1)) (pow (* 180 (/ (acos (/ -1 v2_y)) PI)) 3))) (* -10 (/ (* 1 1 (pow (* 6 0) 2)) (pow (* 180 (/ (acos (/ -1 v2_y)) PI)) 2))) (* -15 (/ (* 1 (pow (* 2 0) 1) 1 (pow (* 24 0) 1)) (pow (* 180 (/ (acos (/ -1 v2_y)) PI)) 2))) (* -6 (/ (* (pow (* 1 0) 1) 1 1 1 (pow (* 120 0) 1)) (pow (* 180 (/ (acos (/ -1 v2_y)) PI)) 2))) (* 1 (/ (* 1 1 1 1 1 (pow (* 720 0) 1)) (pow (* 180 (/ (acos (/ -1 v2_y)) PI)) 1)))) 720) into 0
* [misc]backup-simplify:  Simplify (+ (* 1/3 0) (+ (* 0 0) (+ (* 0 0) (+ (* 0 0) (+ (* 0 0) (+ (* 0 0) (* 0 (log (* 180 (/ (acos (/ -1 v2_y)) PI)))))))))) into 0
* [misc]backup-simplify:  Simplify (* (exp (* 1/3 (log (* 180 (/ (acos (/ -1 v2_y)) PI))))) (+ (* (/ (pow 0 6) 720)) (* (/ (pow 0 4) 24) (/ (pow 0 1) 1)) (* (/ (pow 0 3) 6) (/ (pow 0 1) 1)) (* (/ (pow 0 2) 2) (/ (pow 0 2) 2)) (* (/ (pow 0 2) 2) (/ (pow 0 1) 1)) (* (/ (pow 0 1) 1) (/ (pow 0 1) 1) (/ (pow 0 1) 1)) (* (/ (pow 0 1) 1) (/ (pow 0 1) 1)) (* (/ (pow 0 3) 6)) (* (/ (pow 0 1) 1) (/ (pow 0 1) 1)) (* (/ (pow 0 2) 2)) (* (/ (pow 0 1) 1)))) into 0
* [misc]backup-simplify:  Simplify (+ (* (pow (* 180 (/ (acos (/ -1 v2_y)) PI)) 1/3) 0) (+ (* 0 0) (+ (* 0 0) (+ (* 0 0) (+ (* 0 0) (+ (* 0 0) (* 0 (pow (* 180 (/ (acos (/ -1 v2_y)) PI)) 1/3)))))))) into 0
* [misc]backup-simplify:  Simplify 0 into 0
* [misc]backup-simplify:  Simplify (pow (* 32400 (/ (pow (acos (/ -1 (/ 1 (- v2_y)))) 2) (pow PI 2))) 1/3) into (pow (* 32400 (/ (pow (acos v2_y) 2) (pow PI 2))) 1/3)
* * * * [misc]progress:  [ 2 / 4 ] generating series at (2 2 2 1 1 1)
* [misc]approximate:  Taking taylor expansion of (acos v2_y) in (v2_y) around 0
* [misc]taylor:  Taking taylor expansion of (acos v2_y) in v2_y
* [misc]backup-simplify:  Simplify (acos v2_y) into (acos v2_y)
* [misc]taylor:  Taking taylor expansion of (acos v2_y) in v2_y
* [misc]backup-simplify:  Simplify (acos v2_y) into (acos v2_y)
* [misc]backup-simplify:  Simplify (acos v2_y) into (acos v2_y)
* [misc]backup-simplify:  Simplify 0 into 0
* [misc]backup-simplify:  Simplify 0 into 0
* [misc]backup-simplify:  Simplify 0 into 0
* [misc]backup-simplify:  Simplify 0 into 0
* [misc]backup-simplify:  Simplify 0 into 0
* [misc]backup-simplify:  Simplify 0 into 0
* [misc]backup-simplify:  Simplify (acos v2_y) into (acos v2_y)
* [misc]approximate:  Taking taylor expansion of (acos (/ 1 v2_y)) in (v2_y) around 0
* [misc]taylor:  Taking taylor expansion of (acos (/ 1 v2_y)) in v2_y
* [misc]backup-simplify:  Simplify (acos (/ 1 v2_y)) into (acos (/ 1 v2_y))
* [misc]taylor:  Taking taylor expansion of (acos (/ 1 v2_y)) in v2_y
* [misc]backup-simplify:  Simplify (acos (/ 1 v2_y)) into (acos (/ 1 v2_y))
* [misc]backup-simplify:  Simplify (acos (/ 1 v2_y)) into (acos (/ 1 v2_y))
* [misc]backup-simplify:  Simplify 0 into 0
* [misc]backup-simplify:  Simplify 0 into 0
* [misc]backup-simplify:  Simplify 0 into 0
* [misc]backup-simplify:  Simplify 0 into 0
* [misc]backup-simplify:  Simplify 0 into 0
* [misc]backup-simplify:  Simplify 0 into 0
* [misc]backup-simplify:  Simplify (acos (/ 1 (/ 1 v2_y))) into (acos v2_y)
* [misc]approximate:  Taking taylor expansion of (acos (/ 1 (- v2_y))) in (v2_y) around 0
* [misc]taylor:  Taking taylor expansion of (acos (/ 1 (- v2_y))) in v2_y
* [misc]backup-simplify:  Simplify (acos (/ 1 (- v2_y))) into (acos (/ -1 v2_y))
* [misc]taylor:  Taking taylor expansion of (acos (/ 1 (- v2_y))) in v2_y
* [misc]backup-simplify:  Simplify (acos (/ 1 (- v2_y))) into (acos (/ -1 v2_y))
* [misc]backup-simplify:  Simplify (acos (/ -1 v2_y)) into (acos (/ -1 v2_y))
* [misc]backup-simplify:  Simplify 0 into 0
* [misc]backup-simplify:  Simplify 0 into 0
* [misc]backup-simplify:  Simplify 0 into 0
* [misc]backup-simplify:  Simplify 0 into 0
* [misc]backup-simplify:  Simplify 0 into 0
* [misc]backup-simplify:  Simplify 0 into 0
* [misc]backup-simplify:  Simplify (acos (/ -1 (/ 1 (- v2_y)))) into (acos v2_y)
* * * * [misc]progress:  [ 3 / 4 ] generating series at (2 2 1 2 1 1 1)
* [misc]approximate:  Taking taylor expansion of (acos v2_y) in (v2_y) around 0
* [misc]taylor:  Taking taylor expansion of (acos v2_y) in v2_y
* [misc]backup-simplify:  Simplify (acos v2_y) into (acos v2_y)
* [misc]taylor:  Taking taylor expansion of (acos v2_y) in v2_y
* [misc]backup-simplify:  Simplify (acos v2_y) into (acos v2_y)
* [misc]backup-simplify:  Simplify (acos v2_y) into (acos v2_y)
* [misc]backup-simplify:  Simplify 0 into 0
* [misc]backup-simplify:  Simplify 0 into 0
* [misc]backup-simplify:  Simplify 0 into 0
* [misc]backup-simplify:  Simplify 0 into 0
* [misc]backup-simplify:  Simplify 0 into 0
* [misc]backup-simplify:  Simplify 0 into 0
* [misc]backup-simplify:  Simplify (acos v2_y) into (acos v2_y)
* [misc]approximate:  Taking taylor expansion of (acos (/ 1 v2_y)) in (v2_y) around 0
* [misc]taylor:  Taking taylor expansion of (acos (/ 1 v2_y)) in v2_y
* [misc]backup-simplify:  Simplify (acos (/ 1 v2_y)) into (acos (/ 1 v2_y))
* [misc]taylor:  Taking taylor expansion of (acos (/ 1 v2_y)) in v2_y
* [misc]backup-simplify:  Simplify (acos (/ 1 v2_y)) into (acos (/ 1 v2_y))
* [misc]backup-simplify:  Simplify (acos (/ 1 v2_y)) into (acos (/ 1 v2_y))
* [misc]backup-simplify:  Simplify 0 into 0
* [misc]backup-simplify:  Simplify 0 into 0
* [misc]backup-simplify:  Simplify 0 into 0
* [misc]backup-simplify:  Simplify 0 into 0
* [misc]backup-simplify:  Simplify 0 into 0
* [misc]backup-simplify:  Simplify 0 into 0
* [misc]backup-simplify:  Simplify (acos (/ 1 (/ 1 v2_y))) into (acos v2_y)
* [misc]approximate:  Taking taylor expansion of (acos (/ 1 (- v2_y))) in (v2_y) around 0
* [misc]taylor:  Taking taylor expansion of (acos (/ 1 (- v2_y))) in v2_y
* [misc]backup-simplify:  Simplify (acos (/ 1 (- v2_y))) into (acos (/ -1 v2_y))
* [misc]taylor:  Taking taylor expansion of (acos (/ 1 (- v2_y))) in v2_y
* [misc]backup-simplify:  Simplify (acos (/ 1 (- v2_y))) into (acos (/ -1 v2_y))
* [misc]backup-simplify:  Simplify (acos (/ -1 v2_y)) into (acos (/ -1 v2_y))
* [misc]backup-simplify:  Simplify 0 into 0
* [misc]backup-simplify:  Simplify 0 into 0
* [misc]backup-simplify:  Simplify 0 into 0
* [misc]backup-simplify:  Simplify 0 into 0
* [misc]backup-simplify:  Simplify 0 into 0
* [misc]backup-simplify:  Simplify 0 into 0
* [misc]backup-simplify:  Simplify (acos (/ -1 (/ 1 (- v2_y)))) into (acos v2_y)
* * * * [misc]progress:  [ 4 / 4 ] generating series at (2 2 1 1 1 1 1)
* [misc]approximate:  Taking taylor expansion of (acos v2_y) in (v2_y) around 0
* [misc]taylor:  Taking taylor expansion of (acos v2_y) in v2_y
* [misc]backup-simplify:  Simplify (acos v2_y) into (acos v2_y)
* [misc]taylor:  Taking taylor expansion of (acos v2_y) in v2_y
* [misc]backup-simplify:  Simplify (acos v2_y) into (acos v2_y)
* [misc]backup-simplify:  Simplify (acos v2_y) into (acos v2_y)
* [misc]backup-simplify:  Simplify 0 into 0
* [misc]backup-simplify:  Simplify 0 into 0
* [misc]backup-simplify:  Simplify 0 into 0
* [misc]backup-simplify:  Simplify 0 into 0
* [misc]backup-simplify:  Simplify 0 into 0
* [misc]backup-simplify:  Simplify 0 into 0
* [misc]backup-simplify:  Simplify (acos v2_y) into (acos v2_y)
* [misc]approximate:  Taking taylor expansion of (acos (/ 1 v2_y)) in (v2_y) around 0
* [misc]taylor:  Taking taylor expansion of (acos (/ 1 v2_y)) in v2_y
* [misc]backup-simplify:  Simplify (acos (/ 1 v2_y)) into (acos (/ 1 v2_y))
* [misc]taylor:  Taking taylor expansion of (acos (/ 1 v2_y)) in v2_y
* [misc]backup-simplify:  Simplify (acos (/ 1 v2_y)) into (acos (/ 1 v2_y))
* [misc]backup-simplify:  Simplify (acos (/ 1 v2_y)) into (acos (/ 1 v2_y))
* [misc]backup-simplify:  Simplify 0 into 0
* [misc]backup-simplify:  Simplify 0 into 0
* [misc]backup-simplify:  Simplify 0 into 0
* [misc]backup-simplify:  Simplify 0 into 0
* [misc]backup-simplify:  Simplify 0 into 0
* [misc]backup-simplify:  Simplify 0 into 0
* [misc]backup-simplify:  Simplify (acos (/ 1 (/ 1 v2_y))) into (acos v2_y)
* [misc]approximate:  Taking taylor expansion of (acos (/ 1 (- v2_y))) in (v2_y) around 0
* [misc]taylor:  Taking taylor expansion of (acos (/ 1 (- v2_y))) in v2_y
* [misc]backup-simplify:  Simplify (acos (/ 1 (- v2_y))) into (acos (/ -1 v2_y))
* [misc]taylor:  Taking taylor expansion of (acos (/ 1 (- v2_y))) in v2_y
* [misc]backup-simplify:  Simplify (acos (/ 1 (- v2_y))) into (acos (/ -1 v2_y))
* [misc]backup-simplify:  Simplify (acos (/ -1 v2_y)) into (acos (/ -1 v2_y))
* [misc]backup-simplify:  Simplify 0 into 0
* [misc]backup-simplify:  Simplify 0 into 0
* [misc]backup-simplify:  Simplify 0 into 0
* [misc]backup-simplify:  Simplify 0 into 0
* [misc]backup-simplify:  Simplify 0 into 0
* [misc]backup-simplify:  Simplify 0 into 0
* [misc]backup-simplify:  Simplify (acos (/ -1 (/ 1 (- v2_y)))) into (acos v2_y)
* * * [misc]progress:  simplifying candidates
* * * * [misc]progress:  [ 1 / 69 ] simplifiying candidate #<alt-delta (λ (v2_y) (- 180 (* (pow (/ (* (acos v2_y) 180) PI) (+ 1/3 1/3)) (cbrt (/ (* (acos v2_y) 180) PI)))))>
* [enter]simplify:  Simplifying (+ 1/3 1/3)
* * [misc]simplify:  iters left: 2 (2 enodes)
* [exit]simplify:  Simplified to (+ 1/3 1/3)
* [exit]simplify:  Simplified to (+ 1/3 1/3)
* * * * [misc]progress:  [ 2 / 69 ] simplifiying candidate #<alt-delta (λ (v2_y) (- 180 (* (pow (cbrt (/ (* (acos v2_y) 180) PI)) (+ 1 1)) (cbrt (/ (* (acos v2_y) 180) PI)))))>
* [enter]simplify:  Simplifying (+ 1 1)
* * [misc]simplify:  iters left: 2 (2 enodes)
* * [misc]simplify:  iters left: 1 (4 enodes)
* [exit]simplify:  Simplified to (+ 1 1)
* [exit]simplify:  Simplified to (+ 1 1)
* * * * [misc]progress:  [ 3 / 69 ] simplifiying candidate #<alt-delta (λ (v2_y) (- 180 (* (pow (* (/ (* (acos v2_y) 180) PI) (/ (* (acos v2_y) 180) PI)) 1/3) (cbrt (/ (* (acos v2_y) 180) PI)))))>
* [enter]simplify:  Simplifying (* (/ (* (acos v2_y) 180) PI) (/ (* (acos v2_y) 180) PI))
* * [misc]simplify:  iters left: 6 (7 enodes)
* * [misc]simplify:  iters left: 5 (14 enodes)
* * [misc]simplify:  iters left: 4 (35 enodes)
* * [misc]simplify:  iters left: 3 (84 enodes)
* * [misc]simplify:  iters left: 2 (183 enodes)
* * [misc]simplify:  iters left: 1 (328 enodes)
* [exit]simplify:  Simplified to (* (* (/ 180 PI) (acos v2_y)) (* (/ 180 PI) (acos v2_y)))
* [exit]simplify:  Simplified to (* (* (/ 180 PI) (acos v2_y)) (* (/ 180 PI) (acos v2_y)))
* * * * [misc]progress:  [ 4 / 69 ] simplifiying candidate #<alt-delta (λ (v2_y) (- 180 (* (pow (* (cbrt (/ (* (acos v2_y) 180) PI)) (cbrt (/ (* (acos v2_y) 180) PI))) 1) (cbrt (/ (* (acos v2_y) 180) PI)))))>
* [enter]simplify:  Simplifying (* (cbrt (/ (* (acos v2_y) 180) PI)) (cbrt (/ (* (acos v2_y) 180) PI)))
* * [misc]simplify:  iters left: 6 (8 enodes)
* * [misc]simplify:  iters left: 5 (11 enodes)
* * [misc]simplify:  iters left: 4 (13 enodes)
* * [misc]simplify:  iters left: 3 (16 enodes)
* * [misc]simplify:  iters left: 2 (18 enodes)
* * [misc]simplify:  iters left: 1 (19 enodes)
* [exit]simplify:  Simplified to (* (cbrt (* (/ 180 PI) (acos v2_y))) (cbrt (* (/ 180 PI) (acos v2_y))))
* [exit]simplify:  Simplified to (* (cbrt (* (/ 180 PI) (acos v2_y))) (cbrt (* (/ 180 PI) (acos v2_y))))
* * * * [misc]progress:  [ 5 / 69 ] simplifiying candidate #<alt-delta (λ (v2_y) (- 180 (* (pow (cbrt (/ (* (acos v2_y) 180) PI)) 2) (cbrt (/ (* (acos v2_y) 180) PI)))))>
* * * * [misc]progress:  [ 6 / 69 ] simplifiying candidate #<alt-delta (λ (v2_y) (- 180 (* (pow (cbrt (/ (* (acos v2_y) 180) PI)) (+ 1 1)) (cbrt (/ (* (acos v2_y) 180) PI)))))>
* [enter]simplify:  Simplifying (+ 1 1)
* * [misc]simplify:  iters left: 2 (2 enodes)
* * [misc]simplify:  iters left: 1 (4 enodes)
* [exit]simplify:  Simplified to (+ 1 1)
* [exit]simplify:  Simplified to (+ 1 1)
* * * * [misc]progress:  [ 7 / 69 ] simplifiying candidate #<alt-delta (λ (v2_y) (- 180 (* (pow (* (cbrt (/ (* (acos v2_y) 180) PI)) (cbrt (/ (* (acos v2_y) 180) PI))) 1) (cbrt (/ (* (acos v2_y) 180) PI)))))>
* * * * [misc]progress:  [ 8 / 69 ] simplifiying candidate #<alt-delta (λ (v2_y) (- 180 (* (exp (+ (log (cbrt (/ (* (acos v2_y) 180) PI))) (log (cbrt (/ (* (acos v2_y) 180) PI))))) (cbrt (/ (* (acos v2_y) 180) PI)))))>
* [enter]simplify:  Simplifying (+ (log (cbrt (/ (* (acos v2_y) 180) PI))) (log (cbrt (/ (* (acos v2_y) 180) PI))))
* * [misc]simplify:  iters left: 6 (9 enodes)
* * [misc]simplify:  iters left: 5 (12 enodes)
* * [misc]simplify:  iters left: 4 (14 enodes)
* * [misc]simplify:  iters left: 3 (17 enodes)
* * [misc]simplify:  iters left: 2 (19 enodes)
* * [misc]simplify:  iters left: 1 (20 enodes)
* [exit]simplify:  Simplified to (+ (log (cbrt (/ (acos v2_y) (/ PI 180)))) (log (cbrt (/ (acos v2_y) (/ PI 180)))))
* [exit]simplify:  Simplified to (+ (log (cbrt (/ (acos v2_y) (/ PI 180)))) (log (cbrt (/ (acos v2_y) (/ PI 180)))))
* * * * [misc]progress:  [ 9 / 69 ] simplifiying candidate #<alt-delta (λ (v2_y) (- 180 (* (exp (log (* (cbrt (/ (* (acos v2_y) 180) PI)) (cbrt (/ (* (acos v2_y) 180) PI))))) (cbrt (/ (* (acos v2_y) 180) PI)))))>
* [enter]simplify:  Simplifying (log (* (cbrt (/ (* (acos v2_y) 180) PI)) (cbrt (/ (* (acos v2_y) 180) PI))))
* * [misc]simplify:  iters left: 6 (9 enodes)
* * [misc]simplify:  iters left: 5 (14 enodes)
* * [misc]simplify:  iters left: 4 (16 enodes)
* * [misc]simplify:  iters left: 3 (19 enodes)
* * [misc]simplify:  iters left: 2 (21 enodes)
* * [misc]simplify:  iters left: 1 (22 enodes)
* [exit]simplify:  Simplified to (log (* (cbrt (* (acos v2_y) (/ 180 PI))) (cbrt (* (acos v2_y) (/ 180 PI)))))
* [exit]simplify:  Simplified to (log (* (cbrt (* (acos v2_y) (/ 180 PI))) (cbrt (* (acos v2_y) (/ 180 PI)))))
* * * * [misc]progress:  [ 10 / 69 ] simplifiying candidate #<alt-delta (λ (v2_y) (- 180 (* (log (exp (* (cbrt (/ (* (acos v2_y) 180) PI)) (cbrt (/ (* (acos v2_y) 180) PI))))) (cbrt (/ (* (acos v2_y) 180) PI)))))>
* [enter]simplify:  Simplifying (exp (* (cbrt (/ (* (acos v2_y) 180) PI)) (cbrt (/ (* (acos v2_y) 180) PI))))
* * [misc]simplify:  iters left: 6 (9 enodes)
* * [misc]simplify:  iters left: 5 (14 enodes)
* * [misc]simplify:  iters left: 4 (16 enodes)
* * [misc]simplify:  iters left: 3 (19 enodes)
* * [misc]simplify:  iters left: 2 (21 enodes)
* * [misc]simplify:  iters left: 1 (22 enodes)
* [exit]simplify:  Simplified to (exp (* (cbrt (* (acos v2_y) (/ 180 PI))) (cbrt (* (acos v2_y) (/ 180 PI)))))
* [exit]simplify:  Simplified to (exp (* (cbrt (* (acos v2_y) (/ 180 PI))) (cbrt (* (acos v2_y) (/ 180 PI)))))
* * * * [misc]progress:  [ 11 / 69 ] simplifiying candidate #<alt-delta (λ (v2_y) (- 180 (* (cbrt (* (/ (* (acos v2_y) 180) PI) (/ (* (acos v2_y) 180) PI))) (cbrt (/ (* (acos v2_y) 180) PI)))))>
* [enter]simplify:  Simplifying (* (/ (* (acos v2_y) 180) PI) (/ (* (acos v2_y) 180) PI))
* * [misc]simplify:  iters left: 6 (7 enodes)
* * [misc]simplify:  iters left: 5 (14 enodes)
* * [misc]simplify:  iters left: 4 (35 enodes)
* * [misc]simplify:  iters left: 3 (84 enodes)
* * [misc]simplify:  iters left: 2 (183 enodes)
* * [misc]simplify:  iters left: 1 (328 enodes)
* [exit]simplify:  Simplified to (* (* (/ 180 PI) (acos v2_y)) (* (/ 180 PI) (acos v2_y)))
* [exit]simplify:  Simplified to (* (* (/ 180 PI) (acos v2_y)) (* (/ 180 PI) (acos v2_y)))
* * * * [misc]progress:  [ 12 / 69 ] simplifiying candidate #<alt-delta (λ (v2_y) (- 180 (* (* (* (cbrt (* (cbrt (/ (* (acos v2_y) 180) PI)) (cbrt (/ (* (acos v2_y) 180) PI)))) (cbrt (* (cbrt (/ (* (acos v2_y) 180) PI)) (cbrt (/ (* (acos v2_y) 180) PI))))) (cbrt (* (cbrt (/ (* (acos v2_y) 180) PI)) (cbrt (/ (* (acos v2_y) 180) PI))))) (cbrt (/ (* (acos v2_y) 180) PI)))))>
* [enter]simplify:  Simplifying (* (cbrt (* (cbrt (/ (* (acos v2_y) 180) PI)) (cbrt (/ (* (acos v2_y) 180) PI)))) (cbrt (* (cbrt (/ (* (acos v2_y) 180) PI)) (cbrt (/ (* (acos v2_y) 180) PI)))))
* * [misc]simplify:  iters left: 6 (10 enodes)
* * [misc]simplify:  iters left: 5 (13 enodes)
* * [misc]simplify:  iters left: 4 (15 enodes)
* * [misc]simplify:  iters left: 3 (18 enodes)
* * [misc]simplify:  iters left: 2 (20 enodes)
* * [misc]simplify:  iters left: 1 (21 enodes)
* [exit]simplify:  Simplified to (* (cbrt (* (cbrt (/ (acos v2_y) (/ PI 180))) (cbrt (/ (acos v2_y) (/ PI 180))))) (cbrt (* (cbrt (/ (acos v2_y) (/ PI 180))) (cbrt (/ (acos v2_y) (/ PI 180))))))
* [exit]simplify:  Simplified to (* (cbrt (* (cbrt (/ (acos v2_y) (/ PI 180))) (cbrt (/ (acos v2_y) (/ PI 180))))) (cbrt (* (cbrt (/ (acos v2_y) (/ PI 180))) (cbrt (/ (acos v2_y) (/ PI 180))))))
* [enter]simplify:  Simplifying (cbrt (* (cbrt (/ (* (acos v2_y) 180) PI)) (cbrt (/ (* (acos v2_y) 180) PI))))
* * [misc]simplify:  iters left: 6 (9 enodes)
* * [misc]simplify:  iters left: 5 (12 enodes)
* * [misc]simplify:  iters left: 4 (14 enodes)
* * [misc]simplify:  iters left: 3 (17 enodes)
* * [misc]simplify:  iters left: 2 (19 enodes)
* * [misc]simplify:  iters left: 1 (20 enodes)
* [exit]simplify:  Simplified to (cbrt (* (cbrt (/ (acos v2_y) (/ PI 180))) (cbrt (/ (acos v2_y) (/ PI 180)))))
* [exit]simplify:  Simplified to (cbrt (* (cbrt (/ (acos v2_y) (/ PI 180))) (cbrt (/ (acos v2_y) (/ PI 180)))))
* * * * [misc]progress:  [ 13 / 69 ] simplifiying candidate #<alt-delta (λ (v2_y) (- 180 (* (cbrt (* (* (* (cbrt (/ (* (acos v2_y) 180) PI)) (cbrt (/ (* (acos v2_y) 180) PI))) (* (cbrt (/ (* (acos v2_y) 180) PI)) (cbrt (/ (* (acos v2_y) 180) PI)))) (* (cbrt (/ (* (acos v2_y) 180) PI)) (cbrt (/ (* (acos v2_y) 180) PI))))) (cbrt (/ (* (acos v2_y) 180) PI)))))>
* [enter]simplify:  Simplifying (* (* (* (cbrt (/ (* (acos v2_y) 180) PI)) (cbrt (/ (* (acos v2_y) 180) PI))) (* (cbrt (/ (* (acos v2_y) 180) PI)) (cbrt (/ (* (acos v2_y) 180) PI)))) (* (cbrt (/ (* (acos v2_y) 180) PI)) (cbrt (/ (* (acos v2_y) 180) PI))))
* * [misc]simplify:  iters left: 6 (10 enodes)
* * [misc]simplify:  iters left: 5 (20 enodes)
* * [misc]simplify:  iters left: 4 (30 enodes)
* * [misc]simplify:  iters left: 3 (41 enodes)
* * [misc]simplify:  iters left: 2 (96 enodes)
* * [misc]simplify:  iters left: 1 (277 enodes)
* [exit]simplify:  Simplified to (* (* (/ 180 PI) (acos v2_y)) (* (/ 180 PI) (acos v2_y)))
* [exit]simplify:  Simplified to (* (* (/ 180 PI) (acos v2_y)) (* (/ 180 PI) (acos v2_y)))
* * * * [misc]progress:  [ 14 / 69 ] simplifiying candidate #<alt-delta (λ (v2_y) (- 180 (* (* (sqrt (* (cbrt (/ (* (acos v2_y) 180) PI)) (cbrt (/ (* (acos v2_y) 180) PI)))) (sqrt (* (cbrt (/ (* (acos v2_y) 180) PI)) (cbrt (/ (* (acos v2_y) 180) PI))))) (cbrt (/ (* (acos v2_y) 180) PI)))))>
* [enter]simplify:  Simplifying (sqrt (* (cbrt (/ (* (acos v2_y) 180) PI)) (cbrt (/ (* (acos v2_y) 180) PI))))
* * [misc]simplify:  iters left: 6 (9 enodes)
* * [misc]simplify:  iters left: 5 (13 enodes)
* * [misc]simplify:  iters left: 4 (15 enodes)
* * [misc]simplify:  iters left: 3 (18 enodes)
* * [misc]simplify:  iters left: 2 (20 enodes)
* * [misc]simplify:  iters left: 1 (21 enodes)
* [exit]simplify:  Simplified to (fabs (cbrt (/ (acos v2_y) (/ PI 180))))
* [exit]simplify:  Simplified to (fabs (cbrt (/ (acos v2_y) (/ PI 180))))
* [enter]simplify:  Simplifying (sqrt (* (cbrt (/ (* (acos v2_y) 180) PI)) (cbrt (/ (* (acos v2_y) 180) PI))))
* * [misc]simplify:  iters left: 6 (9 enodes)
* * [misc]simplify:  iters left: 5 (13 enodes)
* * [misc]simplify:  iters left: 4 (15 enodes)
* * [misc]simplify:  iters left: 3 (18 enodes)
* * [misc]simplify:  iters left: 2 (20 enodes)
* * [misc]simplify:  iters left: 1 (21 enodes)
* [exit]simplify:  Simplified to (fabs (cbrt (/ (acos v2_y) (/ PI 180))))
* [exit]simplify:  Simplified to (fabs (cbrt (/ (acos v2_y) (/ PI 180))))
* * * * [misc]progress:  [ 15 / 69 ] simplifiying candidate #<alt-delta (λ (v2_y) (- 180 (* (/ (* (cbrt (* (acos v2_y) 180)) (cbrt (* (acos v2_y) 180))) (* (cbrt PI) (cbrt PI))) (cbrt (/ (* (acos v2_y) 180) PI)))))>
* [enter]simplify:  Simplifying (* (cbrt (* (acos v2_y) 180)) (cbrt (* (acos v2_y) 180)))
* * [misc]simplify:  iters left: 6 (6 enodes)
* * [misc]simplify:  iters left: 5 (7 enodes)
* [exit]simplify:  Simplified to (* (cbrt (* 180 (acos v2_y))) (cbrt (* 180 (acos v2_y))))
* [exit]simplify:  Simplified to (* (cbrt (* 180 (acos v2_y))) (cbrt (* 180 (acos v2_y))))
* [enter]simplify:  Simplifying (* (cbrt PI) (cbrt PI))
* * [misc]simplify:  iters left: 3 (3 enodes)
* [exit]simplify:  Simplified to (* (cbrt PI) (cbrt PI))
* [exit]simplify:  Simplified to (* (cbrt PI) (cbrt PI))
* * * * [misc]progress:  [ 16 / 69 ] simplifiying candidate #<alt-delta (λ (v2_y) (- 180 (* (* 1 (* (cbrt (/ (* (acos v2_y) 180) PI)) (cbrt (/ (* (acos v2_y) 180) PI)))) (cbrt (/ (* (acos v2_y) 180) PI)))))>
* * * * [misc]progress:  [ 17 / 69 ] simplifiying candidate #<alt-delta (λ (v2_y) (- 180 (* (* (* (cbrt (/ (* (acos v2_y) 180) PI)) (cbrt (* (cbrt (/ (* (acos v2_y) 180) PI)) (cbrt (/ (* (acos v2_y) 180) PI))))) (cbrt (cbrt (/ (* (acos v2_y) 180) PI)))) (cbrt (/ (* (acos v2_y) 180) PI)))))>
* [enter]simplify:  Simplifying (* (cbrt (/ (* (acos v2_y) 180) PI)) (cbrt (* (cbrt (/ (* (acos v2_y) 180) PI)) (cbrt (/ (* (acos v2_y) 180) PI)))))
* * [misc]simplify:  iters left: 6 (10 enodes)
* * [misc]simplify:  iters left: 5 (14 enodes)
* * [misc]simplify:  iters left: 4 (16 enodes)
* * [misc]simplify:  iters left: 3 (19 enodes)
* * [misc]simplify:  iters left: 2 (21 enodes)
* * [misc]simplify:  iters left: 1 (22 enodes)
* [exit]simplify:  Simplified to (* (cbrt (* (cbrt (/ (acos v2_y) (/ PI 180))) (cbrt (/ (acos v2_y) (/ PI 180))))) (cbrt (/ (acos v2_y) (/ PI 180))))
* [exit]simplify:  Simplified to (* (cbrt (* (cbrt (/ (acos v2_y) (/ PI 180))) (cbrt (/ (acos v2_y) (/ PI 180))))) (cbrt (/ (acos v2_y) (/ PI 180))))
* * * * [misc]progress:  [ 18 / 69 ] simplifiying candidate #<alt-delta (λ (v2_y) (- 180 (* (* (* (cbrt (/ (* (acos v2_y) 180) PI)) (cbrt (sqrt (/ (* (acos v2_y) 180) PI)))) (cbrt (sqrt (/ (* (acos v2_y) 180) PI)))) (cbrt (/ (* (acos v2_y) 180) PI)))))>
* [enter]simplify:  Simplifying (* (cbrt (/ (* (acos v2_y) 180) PI)) (cbrt (sqrt (/ (* (acos v2_y) 180) PI))))
* * [misc]simplify:  iters left: 6 (10 enodes)
* * [misc]simplify:  iters left: 5 (14 enodes)
* * [misc]simplify:  iters left: 4 (16 enodes)
* * [misc]simplify:  iters left: 3 (19 enodes)
* * [misc]simplify:  iters left: 2 (21 enodes)
* * [misc]simplify:  iters left: 1 (22 enodes)
* [exit]simplify:  Simplified to (* (cbrt (sqrt (/ (acos v2_y) (/ PI 180)))) (cbrt (/ (acos v2_y) (/ PI 180))))
* [exit]simplify:  Simplified to (* (cbrt (sqrt (/ (acos v2_y) (/ PI 180)))) (cbrt (/ (acos v2_y) (/ PI 180))))
* * * * [misc]progress:  [ 19 / 69 ] simplifiying candidate #<alt-delta (λ (v2_y) (- 180 (* (* (* (cbrt (/ (* (acos v2_y) 180) PI)) (cbrt 1)) (cbrt (/ (* (acos v2_y) 180) PI))) (cbrt (/ (* (acos v2_y) 180) PI)))))>
* [enter]simplify:  Simplifying (* (cbrt (/ (* (acos v2_y) 180) PI)) (cbrt 1))
* * [misc]simplify:  iters left: 6 (10 enodes)
* * [misc]simplify:  iters left: 5 (16 enodes)
* * [misc]simplify:  iters left: 4 (18 enodes)
* * [misc]simplify:  iters left: 3 (21 enodes)
* * [misc]simplify:  iters left: 2 (23 enodes)
* * [misc]simplify:  iters left: 1 (24 enodes)
* [exit]simplify:  Simplified to (* (cbrt 1) (cbrt (/ (acos v2_y) (/ PI 180))))
* [exit]simplify:  Simplified to (* (cbrt 1) (cbrt (/ (acos v2_y) (/ PI 180))))
* * * * [misc]progress:  [ 20 / 69 ] simplifiying candidate #<alt-delta (λ (v2_y) (- 180 (* (* (* (cbrt (/ (* (acos v2_y) 180) PI)) (cbrt (* (acos v2_y) 180))) (cbrt (/ 1 PI))) (cbrt (/ (* (acos v2_y) 180) PI)))))>
* [enter]simplify:  Simplifying (* (cbrt (/ (* (acos v2_y) 180) PI)) (cbrt (* (acos v2_y) 180)))
* * [misc]simplify:  iters left: 6 (9 enodes)
* * [misc]simplify:  iters left: 5 (13 enodes)
* * [misc]simplify:  iters left: 4 (15 enodes)
* * [misc]simplify:  iters left: 3 (18 enodes)
* * [misc]simplify:  iters left: 2 (20 enodes)
* * [misc]simplify:  iters left: 1 (21 enodes)
* [exit]simplify:  Simplified to (* (cbrt (* 180 (acos v2_y))) (cbrt (/ (acos v2_y) (/ PI 180))))
* [exit]simplify:  Simplified to (* (cbrt (* 180 (acos v2_y))) (cbrt (/ (acos v2_y) (/ PI 180))))
* * * * [misc]progress:  [ 21 / 69 ] simplifiying candidate #<alt-delta (λ (v2_y) (- 180 (* (* (* (cbrt (/ (* (acos v2_y) 180) PI)) (* (cbrt (cbrt (/ (* (acos v2_y) 180) PI))) (cbrt (cbrt (/ (* (acos v2_y) 180) PI))))) (cbrt (cbrt (/ (* (acos v2_y) 180) PI)))) (cbrt (/ (* (acos v2_y) 180) PI)))))>
* [enter]simplify:  Simplifying (* (cbrt (/ (* (acos v2_y) 180) PI)) (* (cbrt (cbrt (/ (* (acos v2_y) 180) PI))) (cbrt (cbrt (/ (* (acos v2_y) 180) PI)))))
* * [misc]simplify:  iters left: 6 (10 enodes)
* * [misc]simplify:  iters left: 5 (16 enodes)
* * [misc]simplify:  iters left: 4 (20 enodes)
* * [misc]simplify:  iters left: 3 (23 enodes)
* * [misc]simplify:  iters left: 2 (25 enodes)
* * [misc]simplify:  iters left: 1 (26 enodes)
* [exit]simplify:  Simplified to (* (* (cbrt (cbrt (* (acos v2_y) (/ 180 PI)))) (cbrt (* (acos v2_y) (/ 180 PI)))) (cbrt (cbrt (* (acos v2_y) (/ 180 PI)))))
* [exit]simplify:  Simplified to (* (* (cbrt (cbrt (* (acos v2_y) (/ 180 PI)))) (cbrt (* (acos v2_y) (/ 180 PI)))) (cbrt (cbrt (* (acos v2_y) (/ 180 PI)))))
* * * * [misc]progress:  [ 22 / 69 ] simplifiying candidate #<alt-delta (λ (v2_y) (- 180 (* (* (* (cbrt (/ (* (acos v2_y) 180) PI)) (sqrt (cbrt (/ (* (acos v2_y) 180) PI)))) (sqrt (cbrt (/ (* (acos v2_y) 180) PI)))) (cbrt (/ (* (acos v2_y) 180) PI)))))>
* [enter]simplify:  Simplifying (* (cbrt (/ (* (acos v2_y) 180) PI)) (sqrt (cbrt (/ (* (acos v2_y) 180) PI))))
* * [misc]simplify:  iters left: 6 (9 enodes)
* * [misc]simplify:  iters left: 5 (13 enodes)
* * [misc]simplify:  iters left: 4 (15 enodes)
* * [misc]simplify:  iters left: 3 (18 enodes)
* * [misc]simplify:  iters left: 2 (20 enodes)
* * [misc]simplify:  iters left: 1 (21 enodes)
* [exit]simplify:  Simplified to (* (sqrt (cbrt (/ (acos v2_y) (/ PI 180)))) (cbrt (/ (acos v2_y) (/ PI 180))))
* [exit]simplify:  Simplified to (* (sqrt (cbrt (/ (acos v2_y) (/ PI 180)))) (cbrt (/ (acos v2_y) (/ PI 180))))
* * * * [misc]progress:  [ 23 / 69 ] simplifiying candidate #<alt-delta (λ (v2_y) (- 180 (* (* (* (cbrt (/ (* (acos v2_y) 180) PI)) 1) (cbrt (/ (* (acos v2_y) 180) PI))) (cbrt (/ (* (acos v2_y) 180) PI)))))>
* [enter]simplify:  Simplifying (* (cbrt (/ (* (acos v2_y) 180) PI)) 1)
* * [misc]simplify:  iters left: 6 (9 enodes)
* * [misc]simplify:  iters left: 5 (15 enodes)
* * [misc]simplify:  iters left: 4 (19 enodes)
* * [misc]simplify:  iters left: 3 (22 enodes)
* * [misc]simplify:  iters left: 2 (24 enodes)
* * [misc]simplify:  iters left: 1 (25 enodes)
* [exit]simplify:  Simplified to (cbrt (* (/ 180 PI) (acos v2_y)))
* [exit]simplify:  Simplified to (cbrt (* (/ 180 PI) (acos v2_y)))
* * * * [misc]progress:  [ 24 / 69 ] simplifiying candidate #<alt-delta (λ (v2_y) (- 180 (* (* (cbrt (* (cbrt (/ (* (acos v2_y) 180) PI)) (cbrt (/ (* (acos v2_y) 180) PI)))) (* (cbrt (cbrt (/ (* (acos v2_y) 180) PI))) (cbrt (/ (* (acos v2_y) 180) PI)))) (cbrt (/ (* (acos v2_y) 180) PI)))))>
* [enter]simplify:  Simplifying (* (cbrt (cbrt (/ (* (acos v2_y) 180) PI))) (cbrt (/ (* (acos v2_y) 180) PI)))
* * [misc]simplify:  iters left: 6 (9 enodes)
* * [misc]simplify:  iters left: 5 (13 enodes)
* * [misc]simplify:  iters left: 4 (15 enodes)
* * [misc]simplify:  iters left: 3 (18 enodes)
* * [misc]simplify:  iters left: 2 (20 enodes)
* * [misc]simplify:  iters left: 1 (21 enodes)
* [exit]simplify:  Simplified to (* (cbrt (cbrt (/ (acos v2_y) (/ PI 180)))) (cbrt (/ (acos v2_y) (/ PI 180))))
* [exit]simplify:  Simplified to (* (cbrt (cbrt (/ (acos v2_y) (/ PI 180)))) (cbrt (/ (acos v2_y) (/ PI 180))))
* * * * [misc]progress:  [ 25 / 69 ] simplifiying candidate #<alt-delta (λ (v2_y) (- 180 (* (* (cbrt (sqrt (/ (* (acos v2_y) 180) PI))) (* (cbrt (sqrt (/ (* (acos v2_y) 180) PI))) (cbrt (/ (* (acos v2_y) 180) PI)))) (cbrt (/ (* (acos v2_y) 180) PI)))))>
* [enter]simplify:  Simplifying (* (cbrt (sqrt (/ (* (acos v2_y) 180) PI))) (cbrt (/ (* (acos v2_y) 180) PI)))
* * [misc]simplify:  iters left: 6 (10 enodes)
* * [misc]simplify:  iters left: 5 (14 enodes)
* * [misc]simplify:  iters left: 4 (16 enodes)
* * [misc]simplify:  iters left: 3 (19 enodes)
* * [misc]simplify:  iters left: 2 (21 enodes)
* * [misc]simplify:  iters left: 1 (22 enodes)
* [exit]simplify:  Simplified to (* (cbrt (sqrt (/ (acos v2_y) (/ PI 180)))) (cbrt (/ (acos v2_y) (/ PI 180))))
* [exit]simplify:  Simplified to (* (cbrt (sqrt (/ (acos v2_y) (/ PI 180)))) (cbrt (/ (acos v2_y) (/ PI 180))))
* * * * [misc]progress:  [ 26 / 69 ] simplifiying candidate #<alt-delta (λ (v2_y) (- 180 (* (* (cbrt 1) (* (cbrt (/ (* (acos v2_y) 180) PI)) (cbrt (/ (* (acos v2_y) 180) PI)))) (cbrt (/ (* (acos v2_y) 180) PI)))))>
* [enter]simplify:  Simplifying (* (cbrt (/ (* (acos v2_y) 180) PI)) (cbrt (/ (* (acos v2_y) 180) PI)))
* * [misc]simplify:  iters left: 6 (8 enodes)
* * [misc]simplify:  iters left: 5 (11 enodes)
* * [misc]simplify:  iters left: 4 (13 enodes)
* * [misc]simplify:  iters left: 3 (16 enodes)
* * [misc]simplify:  iters left: 2 (18 enodes)
* * [misc]simplify:  iters left: 1 (19 enodes)
* [exit]simplify:  Simplified to (* (cbrt (* (/ 180 PI) (acos v2_y))) (cbrt (* (/ 180 PI) (acos v2_y))))
* [exit]simplify:  Simplified to (* (cbrt (* (/ 180 PI) (acos v2_y))) (cbrt (* (/ 180 PI) (acos v2_y))))
* * * * [misc]progress:  [ 27 / 69 ] simplifiying candidate #<alt-delta (λ (v2_y) (- 180 (* (* (cbrt (* (acos v2_y) 180)) (* (cbrt (/ 1 PI)) (cbrt (/ (* (acos v2_y) 180) PI)))) (cbrt (/ (* (acos v2_y) 180) PI)))))>
* [enter]simplify:  Simplifying (* (cbrt (/ 1 PI)) (cbrt (/ (* (acos v2_y) 180) PI)))
* * [misc]simplify:  iters left: 6 (11 enodes)
* * [misc]simplify:  iters left: 5 (17 enodes)
* * [misc]simplify:  iters left: 4 (19 enodes)
* * [misc]simplify:  iters left: 3 (22 enodes)
* * [misc]simplify:  iters left: 2 (24 enodes)
* * [misc]simplify:  iters left: 1 (25 enodes)
* [exit]simplify:  Simplified to (* (cbrt (* (/ 180 PI) (acos v2_y))) (cbrt (/ 1 PI)))
* [exit]simplify:  Simplified to (* (cbrt (* (/ 180 PI) (acos v2_y))) (cbrt (/ 1 PI)))
* * * * [misc]progress:  [ 28 / 69 ] simplifiying candidate #<alt-delta (λ (v2_y) (- 180 (* (* (* (cbrt (cbrt (/ (* (acos v2_y) 180) PI))) (cbrt (cbrt (/ (* (acos v2_y) 180) PI)))) (* (cbrt (cbrt (/ (* (acos v2_y) 180) PI))) (cbrt (/ (* (acos v2_y) 180) PI)))) (cbrt (/ (* (acos v2_y) 180) PI)))))>
* [enter]simplify:  Simplifying (* (cbrt (cbrt (/ (* (acos v2_y) 180) PI))) (cbrt (/ (* (acos v2_y) 180) PI)))
* * [misc]simplify:  iters left: 6 (9 enodes)
* * [misc]simplify:  iters left: 5 (13 enodes)
* * [misc]simplify:  iters left: 4 (15 enodes)
* * [misc]simplify:  iters left: 3 (18 enodes)
* * [misc]simplify:  iters left: 2 (20 enodes)
* * [misc]simplify:  iters left: 1 (21 enodes)
* [exit]simplify:  Simplified to (* (cbrt (cbrt (/ (acos v2_y) (/ PI 180)))) (cbrt (/ (acos v2_y) (/ PI 180))))
* [exit]simplify:  Simplified to (* (cbrt (cbrt (/ (acos v2_y) (/ PI 180)))) (cbrt (/ (acos v2_y) (/ PI 180))))
* * * * [misc]progress:  [ 29 / 69 ] simplifiying candidate #<alt-delta (λ (v2_y) (- 180 (* (* (sqrt (cbrt (/ (* (acos v2_y) 180) PI))) (* (sqrt (cbrt (/ (* (acos v2_y) 180) PI))) (cbrt (/ (* (acos v2_y) 180) PI)))) (cbrt (/ (* (acos v2_y) 180) PI)))))>
* [enter]simplify:  Simplifying (* (sqrt (cbrt (/ (* (acos v2_y) 180) PI))) (cbrt (/ (* (acos v2_y) 180) PI)))
* * [misc]simplify:  iters left: 6 (9 enodes)
* * [misc]simplify:  iters left: 5 (13 enodes)
* * [misc]simplify:  iters left: 4 (15 enodes)
* * [misc]simplify:  iters left: 3 (18 enodes)
* * [misc]simplify:  iters left: 2 (20 enodes)
* * [misc]simplify:  iters left: 1 (21 enodes)
* [exit]simplify:  Simplified to (* (sqrt (cbrt (/ (acos v2_y) (/ PI 180)))) (cbrt (/ (acos v2_y) (/ PI 180))))
* [exit]simplify:  Simplified to (* (sqrt (cbrt (/ (acos v2_y) (/ PI 180)))) (cbrt (/ (acos v2_y) (/ PI 180))))
* * * * [misc]progress:  [ 30 / 69 ] simplifiying candidate #<alt-delta (λ (v2_y) (- 180 (* (* 1 (* (cbrt (/ (* (acos v2_y) 180) PI)) (cbrt (/ (* (acos v2_y) 180) PI)))) (cbrt (/ (* (acos v2_y) 180) PI)))))>
* [enter]simplify:  Simplifying (* (cbrt (/ (* (acos v2_y) 180) PI)) (cbrt (/ (* (acos v2_y) 180) PI)))
* * [misc]simplify:  iters left: 6 (8 enodes)
* * [misc]simplify:  iters left: 5 (11 enodes)
* * [misc]simplify:  iters left: 4 (13 enodes)
* * [misc]simplify:  iters left: 3 (16 enodes)
* * [misc]simplify:  iters left: 2 (18 enodes)
* * [misc]simplify:  iters left: 1 (19 enodes)
* [exit]simplify:  Simplified to (* (cbrt (* (/ 180 PI) (acos v2_y))) (cbrt (* (/ 180 PI) (acos v2_y))))
* [exit]simplify:  Simplified to (* (cbrt (* (/ 180 PI) (acos v2_y))) (cbrt (* (/ 180 PI) (acos v2_y))))
* * * * [misc]progress:  [ 31 / 69 ] simplifiying candidate #<alt-delta (λ (v2_y) (- 180 (* (/ (* (cbrt (/ (* (acos v2_y) 180) PI)) (cbrt (* (acos v2_y) 180))) (cbrt PI)) (cbrt (/ (* (acos v2_y) 180) PI)))))>
* [enter]simplify:  Simplifying (* (cbrt (/ (* (acos v2_y) 180) PI)) (cbrt (* (acos v2_y) 180)))
* * [misc]simplify:  iters left: 6 (9 enodes)
* * [misc]simplify:  iters left: 5 (13 enodes)
* * [misc]simplify:  iters left: 4 (15 enodes)
* * [misc]simplify:  iters left: 3 (18 enodes)
* * [misc]simplify:  iters left: 2 (20 enodes)
* * [misc]simplify:  iters left: 1 (21 enodes)
* [exit]simplify:  Simplified to (* (cbrt (* 180 (acos v2_y))) (cbrt (/ (acos v2_y) (/ PI 180))))
* [exit]simplify:  Simplified to (* (cbrt (* 180 (acos v2_y))) (cbrt (/ (acos v2_y) (/ PI 180))))
* * * * [misc]progress:  [ 32 / 69 ] simplifiying candidate #<alt-delta (λ (v2_y) (- 180 (* (/ (* (cbrt (* (acos v2_y) 180)) (cbrt (/ (* (acos v2_y) 180) PI))) (cbrt PI)) (cbrt (/ (* (acos v2_y) 180) PI)))))>
* [enter]simplify:  Simplifying (* (cbrt (* (acos v2_y) 180)) (cbrt (/ (* (acos v2_y) 180) PI)))
* * [misc]simplify:  iters left: 6 (9 enodes)
* * [misc]simplify:  iters left: 5 (13 enodes)
* * [misc]simplify:  iters left: 4 (15 enodes)
* * [misc]simplify:  iters left: 3 (18 enodes)
* * [misc]simplify:  iters left: 2 (20 enodes)
* * [misc]simplify:  iters left: 1 (21 enodes)
* [exit]simplify:  Simplified to (* (cbrt (/ (acos v2_y) (/ PI 180))) (cbrt (* 180 (acos v2_y))))
* [exit]simplify:  Simplified to (* (cbrt (/ (acos v2_y) (/ PI 180))) (cbrt (* 180 (acos v2_y))))
* * * * [misc]progress:  [ 33 / 69 ] simplifiying candidate #<alt-delta (λ (v2_y) (- 180 (* (* (cbrt (/ (* (acos v2_y) 180) PI)) (cbrt (/ (* (acos v2_y) 180) PI))) (cbrt (/ (* (acos v2_y) 180) PI)))))>
* * * * [misc]progress:  [ 34 / 69 ] simplifiying candidate #<alt-delta (λ (v2_y) (- 180 (* (* (cbrt (/ (* (acos v2_y) 180) PI)) (cbrt (/ (* (acos v2_y) 180) PI))) (cbrt (/ (* (- (/ PI 2) (asin v2_y)) 180) PI)))))>
* [enter]simplify:  Simplifying (/ PI 2)
* * [misc]simplify:  iters left: 2 (3 enodes)
* [exit]simplify:  Simplified to (/ PI 2)
* [exit]simplify:  Simplified to (/ PI 2)
* [enter]simplify:  Simplifying (asin v2_y)
* * [misc]simplify:  iters left: 1 (2 enodes)
* [exit]simplify:  Simplified to (asin v2_y)
* [exit]simplify:  Simplified to (asin v2_y)
* * * * [misc]progress:  [ 35 / 69 ] simplifiying candidate #<alt-delta (λ (v2_y) (- 180 (* (* (cbrt (/ (* (acos v2_y) 180) PI)) (cbrt (/ (* (acos v2_y) 180) PI))) (cbrt (/ (* (pow (acos v2_y) 1) 180) PI)))))>
* * * * [misc]progress:  [ 36 / 69 ] simplifiying candidate #<alt-delta (λ (v2_y) (- 180 (* (* (cbrt (/ (* (acos v2_y) 180) PI)) (cbrt (/ (* (acos v2_y) 180) PI))) (cbrt (/ (* (exp (log (acos v2_y))) 180) PI)))))>
* [enter]simplify:  Simplifying (log (acos v2_y))
* * [misc]simplify:  iters left: 2 (3 enodes)
* [exit]simplify:  Simplified to (log (acos v2_y))
* [exit]simplify:  Simplified to (log (acos v2_y))
* * * * [misc]progress:  [ 37 / 69 ] simplifiying candidate #<alt-delta (λ (v2_y) (- 180 (* (* (cbrt (/ (* (acos v2_y) 180) PI)) (cbrt (/ (* (acos v2_y) 180) PI))) (cbrt (/ (* (log (exp (acos v2_y))) 180) PI)))))>
* [enter]simplify:  Simplifying (exp (acos v2_y))
* * [misc]simplify:  iters left: 2 (3 enodes)
* [exit]simplify:  Simplified to (exp (acos v2_y))
* [exit]simplify:  Simplified to (exp (acos v2_y))
* * * * [misc]progress:  [ 38 / 69 ] simplifiying candidate #<alt-delta (λ (v2_y) (- 180 (* (* (cbrt (/ (* (acos v2_y) 180) PI)) (cbrt (/ (* (acos v2_y) 180) PI))) (cbrt (/ (* (* (* (cbrt (acos v2_y)) (cbrt (acos v2_y))) (cbrt (acos v2_y))) 180) PI)))))>
* [enter]simplify:  Simplifying (* (cbrt (acos v2_y)) (cbrt (acos v2_y)))
* * [misc]simplify:  iters left: 4 (4 enodes)
* [exit]simplify:  Simplified to (* (cbrt (acos v2_y)) (cbrt (acos v2_y)))
* [exit]simplify:  Simplified to (* (cbrt (acos v2_y)) (cbrt (acos v2_y)))
* [enter]simplify:  Simplifying (cbrt (acos v2_y))
* * [misc]simplify:  iters left: 2 (3 enodes)
* [exit]simplify:  Simplified to (cbrt (acos v2_y))
* [exit]simplify:  Simplified to (cbrt (acos v2_y))
* * * * [misc]progress:  [ 39 / 69 ] simplifiying candidate #<alt-delta (λ (v2_y) (- 180 (* (* (cbrt (/ (* (acos v2_y) 180) PI)) (cbrt (/ (* (acos v2_y) 180) PI))) (cbrt (/ (* (cbrt (* (* (acos v2_y) (acos v2_y)) (acos v2_y))) 180) PI)))))>
* [enter]simplify:  Simplifying (* (* (acos v2_y) (acos v2_y)) (acos v2_y))
* * [misc]simplify:  iters left: 5 (4 enodes)
* * [misc]simplify:  iters left: 4 (5 enodes)
* * [misc]simplify:  iters left: 3 (7 enodes)
* [exit]simplify:  Simplified to (pow (acos v2_y) 3)
* [exit]simplify:  Simplified to (pow (acos v2_y) 3)
* * * * [misc]progress:  [ 40 / 69 ] simplifiying candidate #<alt-delta (λ (v2_y) (- 180 (* (* (cbrt (/ (* (acos v2_y) 180) PI)) (cbrt (/ (* (acos v2_y) 180) PI))) (cbrt (/ (* (* (sqrt (acos v2_y)) (sqrt (acos v2_y))) 180) PI)))))>
* [enter]simplify:  Simplifying (sqrt (acos v2_y))
* * [misc]simplify:  iters left: 2 (3 enodes)
* [exit]simplify:  Simplified to (sqrt (acos v2_y))
* [exit]simplify:  Simplified to (sqrt (acos v2_y))
* [enter]simplify:  Simplifying (sqrt (acos v2_y))
* * [misc]simplify:  iters left: 2 (3 enodes)
* [exit]simplify:  Simplified to (sqrt (acos v2_y))
* [exit]simplify:  Simplified to (sqrt (acos v2_y))
* * * * [misc]progress:  [ 41 / 69 ] simplifiying candidate #<alt-delta (λ (v2_y) (- 180 (* (* (cbrt (/ (* (acos v2_y) 180) PI)) (cbrt (/ (* (acos v2_y) 180) PI))) (cbrt (/ (* (* 1 (acos v2_y)) 180) PI)))))>
* * * * [misc]progress:  [ 42 / 69 ] simplifiying candidate #<alt-delta (λ (v2_y) (- 180 (* (* (cbrt (/ (* (acos v2_y) 180) PI)) (cbrt (/ (* (- (/ PI 2) (asin v2_y)) 180) PI))) (cbrt (/ (* (acos v2_y) 180) PI)))))>
* [enter]simplify:  Simplifying (/ PI 2)
* * [misc]simplify:  iters left: 2 (3 enodes)
* [exit]simplify:  Simplified to (/ PI 2)
* [exit]simplify:  Simplified to (/ PI 2)
* [enter]simplify:  Simplifying (asin v2_y)
* * [misc]simplify:  iters left: 1 (2 enodes)
* [exit]simplify:  Simplified to (asin v2_y)
* [exit]simplify:  Simplified to (asin v2_y)
* * * * [misc]progress:  [ 43 / 69 ] simplifiying candidate #<alt-delta (λ (v2_y) (- 180 (* (* (cbrt (/ (* (acos v2_y) 180) PI)) (cbrt (/ (* (pow (acos v2_y) 1) 180) PI))) (cbrt (/ (* (acos v2_y) 180) PI)))))>
* * * * [misc]progress:  [ 44 / 69 ] simplifiying candidate #<alt-delta (λ (v2_y) (- 180 (* (* (cbrt (/ (* (acos v2_y) 180) PI)) (cbrt (/ (* (exp (log (acos v2_y))) 180) PI))) (cbrt (/ (* (acos v2_y) 180) PI)))))>
* [enter]simplify:  Simplifying (log (acos v2_y))
* * [misc]simplify:  iters left: 2 (3 enodes)
* [exit]simplify:  Simplified to (log (acos v2_y))
* [exit]simplify:  Simplified to (log (acos v2_y))
* * * * [misc]progress:  [ 45 / 69 ] simplifiying candidate #<alt-delta (λ (v2_y) (- 180 (* (* (cbrt (/ (* (acos v2_y) 180) PI)) (cbrt (/ (* (log (exp (acos v2_y))) 180) PI))) (cbrt (/ (* (acos v2_y) 180) PI)))))>
* [enter]simplify:  Simplifying (exp (acos v2_y))
* * [misc]simplify:  iters left: 2 (3 enodes)
* [exit]simplify:  Simplified to (exp (acos v2_y))
* [exit]simplify:  Simplified to (exp (acos v2_y))
* * * * [misc]progress:  [ 46 / 69 ] simplifiying candidate #<alt-delta (λ (v2_y) (- 180 (* (* (cbrt (/ (* (acos v2_y) 180) PI)) (cbrt (/ (* (* (* (cbrt (acos v2_y)) (cbrt (acos v2_y))) (cbrt (acos v2_y))) 180) PI))) (cbrt (/ (* (acos v2_y) 180) PI)))))>
* [enter]simplify:  Simplifying (* (cbrt (acos v2_y)) (cbrt (acos v2_y)))
* * [misc]simplify:  iters left: 4 (4 enodes)
* [exit]simplify:  Simplified to (* (cbrt (acos v2_y)) (cbrt (acos v2_y)))
* [exit]simplify:  Simplified to (* (cbrt (acos v2_y)) (cbrt (acos v2_y)))
* [enter]simplify:  Simplifying (cbrt (acos v2_y))
* * [misc]simplify:  iters left: 2 (3 enodes)
* [exit]simplify:  Simplified to (cbrt (acos v2_y))
* [exit]simplify:  Simplified to (cbrt (acos v2_y))
* * * * [misc]progress:  [ 47 / 69 ] simplifiying candidate #<alt-delta (λ (v2_y) (- 180 (* (* (cbrt (/ (* (acos v2_y) 180) PI)) (cbrt (/ (* (cbrt (* (* (acos v2_y) (acos v2_y)) (acos v2_y))) 180) PI))) (cbrt (/ (* (acos v2_y) 180) PI)))))>
* [enter]simplify:  Simplifying (* (* (acos v2_y) (acos v2_y)) (acos v2_y))
* * [misc]simplify:  iters left: 5 (4 enodes)
* * [misc]simplify:  iters left: 4 (5 enodes)
* * [misc]simplify:  iters left: 3 (7 enodes)
* [exit]simplify:  Simplified to (pow (acos v2_y) 3)
* [exit]simplify:  Simplified to (pow (acos v2_y) 3)
* * * * [misc]progress:  [ 48 / 69 ] simplifiying candidate #<alt-delta (λ (v2_y) (- 180 (* (* (cbrt (/ (* (acos v2_y) 180) PI)) (cbrt (/ (* (* (sqrt (acos v2_y)) (sqrt (acos v2_y))) 180) PI))) (cbrt (/ (* (acos v2_y) 180) PI)))))>
* [enter]simplify:  Simplifying (sqrt (acos v2_y))
* * [misc]simplify:  iters left: 2 (3 enodes)
* [exit]simplify:  Simplified to (sqrt (acos v2_y))
* [exit]simplify:  Simplified to (sqrt (acos v2_y))
* [enter]simplify:  Simplifying (sqrt (acos v2_y))
* * [misc]simplify:  iters left: 2 (3 enodes)
* [exit]simplify:  Simplified to (sqrt (acos v2_y))
* [exit]simplify:  Simplified to (sqrt (acos v2_y))
* * * * [misc]progress:  [ 49 / 69 ] simplifiying candidate #<alt-delta (λ (v2_y) (- 180 (* (* (cbrt (/ (* (acos v2_y) 180) PI)) (cbrt (/ (* (* 1 (acos v2_y)) 180) PI))) (cbrt (/ (* (acos v2_y) 180) PI)))))>
* * * * [misc]progress:  [ 50 / 69 ] simplifiying candidate #<alt-delta (λ (v2_y) (- 180 (* (* (cbrt (/ (* (- (/ PI 2) (asin v2_y)) 180) PI)) (cbrt (/ (* (acos v2_y) 180) PI))) (cbrt (/ (* (acos v2_y) 180) PI)))))>
* [enter]simplify:  Simplifying (/ PI 2)
* * [misc]simplify:  iters left: 2 (3 enodes)
* [exit]simplify:  Simplified to (/ PI 2)
* [exit]simplify:  Simplified to (/ PI 2)
* [enter]simplify:  Simplifying (asin v2_y)
* * [misc]simplify:  iters left: 1 (2 enodes)
* [exit]simplify:  Simplified to (asin v2_y)
* [exit]simplify:  Simplified to (asin v2_y)
* * * * [misc]progress:  [ 51 / 69 ] simplifiying candidate #<alt-delta (λ (v2_y) (- 180 (* (* (cbrt (/ (* (pow (acos v2_y) 1) 180) PI)) (cbrt (/ (* (acos v2_y) 180) PI))) (cbrt (/ (* (acos v2_y) 180) PI)))))>
* * * * [misc]progress:  [ 52 / 69 ] simplifiying candidate #<alt-delta (λ (v2_y) (- 180 (* (* (cbrt (/ (* (exp (log (acos v2_y))) 180) PI)) (cbrt (/ (* (acos v2_y) 180) PI))) (cbrt (/ (* (acos v2_y) 180) PI)))))>
* [enter]simplify:  Simplifying (log (acos v2_y))
* * [misc]simplify:  iters left: 2 (3 enodes)
* [exit]simplify:  Simplified to (log (acos v2_y))
* [exit]simplify:  Simplified to (log (acos v2_y))
* * * * [misc]progress:  [ 53 / 69 ] simplifiying candidate #<alt-delta (λ (v2_y) (- 180 (* (* (cbrt (/ (* (log (exp (acos v2_y))) 180) PI)) (cbrt (/ (* (acos v2_y) 180) PI))) (cbrt (/ (* (acos v2_y) 180) PI)))))>
* [enter]simplify:  Simplifying (exp (acos v2_y))
* * [misc]simplify:  iters left: 2 (3 enodes)
* [exit]simplify:  Simplified to (exp (acos v2_y))
* [exit]simplify:  Simplified to (exp (acos v2_y))
* * * * [misc]progress:  [ 54 / 69 ] simplifiying candidate #<alt-delta (λ (v2_y) (- 180 (* (* (cbrt (/ (* (* (* (cbrt (acos v2_y)) (cbrt (acos v2_y))) (cbrt (acos v2_y))) 180) PI)) (cbrt (/ (* (acos v2_y) 180) PI))) (cbrt (/ (* (acos v2_y) 180) PI)))))>
* [enter]simplify:  Simplifying (* (cbrt (acos v2_y)) (cbrt (acos v2_y)))
* * [misc]simplify:  iters left: 4 (4 enodes)
* [exit]simplify:  Simplified to (* (cbrt (acos v2_y)) (cbrt (acos v2_y)))
* [exit]simplify:  Simplified to (* (cbrt (acos v2_y)) (cbrt (acos v2_y)))
* [enter]simplify:  Simplifying (cbrt (acos v2_y))
* * [misc]simplify:  iters left: 2 (3 enodes)
* [exit]simplify:  Simplified to (cbrt (acos v2_y))
* [exit]simplify:  Simplified to (cbrt (acos v2_y))
* * * * [misc]progress:  [ 55 / 69 ] simplifiying candidate #<alt-delta (λ (v2_y) (- 180 (* (* (cbrt (/ (* (cbrt (* (* (acos v2_y) (acos v2_y)) (acos v2_y))) 180) PI)) (cbrt (/ (* (acos v2_y) 180) PI))) (cbrt (/ (* (acos v2_y) 180) PI)))))>
* [enter]simplify:  Simplifying (* (* (acos v2_y) (acos v2_y)) (acos v2_y))
* * [misc]simplify:  iters left: 5 (4 enodes)
* * [misc]simplify:  iters left: 4 (5 enodes)
* * [misc]simplify:  iters left: 3 (7 enodes)
* [exit]simplify:  Simplified to (pow (acos v2_y) 3)
* [exit]simplify:  Simplified to (pow (acos v2_y) 3)
* * * * [misc]progress:  [ 56 / 69 ] simplifiying candidate #<alt-delta (λ (v2_y) (- 180 (* (* (cbrt (/ (* (* (sqrt (acos v2_y)) (sqrt (acos v2_y))) 180) PI)) (cbrt (/ (* (acos v2_y) 180) PI))) (cbrt (/ (* (acos v2_y) 180) PI)))))>
* [enter]simplify:  Simplifying (sqrt (acos v2_y))
* * [misc]simplify:  iters left: 2 (3 enodes)
* [exit]simplify:  Simplified to (sqrt (acos v2_y))
* [exit]simplify:  Simplified to (sqrt (acos v2_y))
* [enter]simplify:  Simplifying (sqrt (acos v2_y))
* * [misc]simplify:  iters left: 2 (3 enodes)
* [exit]simplify:  Simplified to (sqrt (acos v2_y))
* [exit]simplify:  Simplified to (sqrt (acos v2_y))
* * * * [misc]progress:  [ 57 / 69 ] simplifiying candidate #<alt-delta (λ (v2_y) (- 180 (* (* (cbrt (/ (* (* 1 (acos v2_y)) 180) PI)) (cbrt (/ (* (acos v2_y) 180) PI))) (cbrt (/ (* (acos v2_y) 180) PI)))))>
* * * * [misc]progress:  [ 58 / 69 ] simplifiying candidate #<alt-event (λ (v2_y) (- 180 (* (pow (* 32400 (/ (pow (acos v2_y) 2) (pow PI 2))) 1/3) (cbrt (/ (* (acos v2_y) 180) PI)))))>
* [enter]simplify:  Simplifying (- 180 (* (pow (* 32400 (/ (pow (acos v2_y) 2) (pow PI 2))) 1/3) (cbrt (/ (* (acos v2_y) 180) PI))))
* * [misc]simplify:  iters left: 6 (17 enodes)
* * [misc]simplify:  iters left: 5 (29 enodes)
* * [misc]simplify:  iters left: 4 (53 enodes)
* * [misc]simplify:  iters left: 3 (91 enodes)
* * [misc]simplify:  iters left: 2 (133 enodes)
* * [misc]simplify:  iters left: 1 (180 enodes)
* [exit]simplify:  Simplified to (- 180 (* (cbrt (* (acos v2_y) (/ 180 PI))) (cbrt (* (* (acos v2_y) 32400) (/ (acos v2_y) (* PI PI))))))
* * * * [misc]progress:  [ 59 / 69 ] simplifiying candidate #<alt-event (λ (v2_y) (- 180 (* (pow (* 32400 (/ (pow (acos v2_y) 2) (pow PI 2))) 1/3) (cbrt (/ (* (acos v2_y) 180) PI)))))>
* [enter]simplify:  Simplifying (- 180 (* (pow (* 32400 (/ (pow (acos v2_y) 2) (pow PI 2))) 1/3) (cbrt (/ (* (acos v2_y) 180) PI))))
* * [misc]simplify:  iters left: 6 (17 enodes)
* * [misc]simplify:  iters left: 5 (29 enodes)
* * [misc]simplify:  iters left: 4 (53 enodes)
* * [misc]simplify:  iters left: 3 (91 enodes)
* * [misc]simplify:  iters left: 2 (133 enodes)
* * [misc]simplify:  iters left: 1 (180 enodes)
* [exit]simplify:  Simplified to (- 180 (* (cbrt (* (acos v2_y) (/ 180 PI))) (cbrt (* (* (acos v2_y) 32400) (/ (acos v2_y) (* PI PI))))))
* * * * [misc]progress:  [ 60 / 69 ] simplifiying candidate #<alt-event (λ (v2_y) (- 180 (* (pow (* 32400 (/ (pow (acos v2_y) 2) (pow PI 2))) 1/3) (cbrt (/ (* (acos v2_y) 180) PI)))))>
* [enter]simplify:  Simplifying (- 180 (* (pow (* 32400 (/ (pow (acos v2_y) 2) (pow PI 2))) 1/3) (cbrt (/ (* (acos v2_y) 180) PI))))
* * [misc]simplify:  iters left: 6 (17 enodes)
* * [misc]simplify:  iters left: 5 (29 enodes)
* * [misc]simplify:  iters left: 4 (53 enodes)
* * [misc]simplify:  iters left: 3 (91 enodes)
* * [misc]simplify:  iters left: 2 (133 enodes)
* * [misc]simplify:  iters left: 1 (180 enodes)
* [exit]simplify:  Simplified to (- 180 (* (cbrt (* (acos v2_y) (/ 180 PI))) (cbrt (* (* (acos v2_y) 32400) (/ (acos v2_y) (* PI PI))))))
* * * * [misc]progress:  [ 61 / 69 ] simplifiying candidate #<alt-event (λ (v2_y) (- 180 (* (* (cbrt (/ (* (acos v2_y) 180) PI)) (cbrt (/ (* (acos v2_y) 180) PI))) (cbrt (/ (* (acos v2_y) 180) PI)))))>
* [enter]simplify:  Simplifying (- 180 (* (* (cbrt (/ (* (acos v2_y) 180) PI)) (cbrt (/ (* (acos v2_y) 180) PI))) (cbrt (/ (* (acos v2_y) 180) PI))))
* * [misc]simplify:  iters left: 6 (10 enodes)
* * [misc]simplify:  iters left: 5 (16 enodes)
* * [misc]simplify:  iters left: 4 (27 enodes)
* * [misc]simplify:  iters left: 3 (32 enodes)
* * [misc]simplify:  iters left: 2 (40 enodes)
* * [misc]simplify:  iters left: 1 (57 enodes)
* [exit]simplify:  Simplified to (- 180 (* (acos v2_y) (/ 180 PI)))
* * * * [misc]progress:  [ 62 / 69 ] simplifiying candidate #<alt-event (λ (v2_y) (- 180 (* (* (cbrt (/ (* (acos v2_y) 180) PI)) (cbrt (/ (* (acos v2_y) 180) PI))) (cbrt (/ (* (acos v2_y) 180) PI)))))>
* [enter]simplify:  Simplifying (- 180 (* (* (cbrt (/ (* (acos v2_y) 180) PI)) (cbrt (/ (* (acos v2_y) 180) PI))) (cbrt (/ (* (acos v2_y) 180) PI))))
* * [misc]simplify:  iters left: 6 (10 enodes)
* * [misc]simplify:  iters left: 5 (16 enodes)
* * [misc]simplify:  iters left: 4 (27 enodes)
* * [misc]simplify:  iters left: 3 (32 enodes)
* * [misc]simplify:  iters left: 2 (40 enodes)
* * [misc]simplify:  iters left: 1 (57 enodes)
* [exit]simplify:  Simplified to (- 180 (* (acos v2_y) (/ 180 PI)))
* * * * [misc]progress:  [ 63 / 69 ] simplifiying candidate #<alt-event (λ (v2_y) (- 180 (* (* (cbrt (/ (* (acos v2_y) 180) PI)) (cbrt (/ (* (acos v2_y) 180) PI))) (cbrt (/ (* (acos v2_y) 180) PI)))))>
* [enter]simplify:  Simplifying (- 180 (* (* (cbrt (/ (* (acos v2_y) 180) PI)) (cbrt (/ (* (acos v2_y) 180) PI))) (cbrt (/ (* (acos v2_y) 180) PI))))
* * [misc]simplify:  iters left: 6 (10 enodes)
* * [misc]simplify:  iters left: 5 (16 enodes)
* * [misc]simplify:  iters left: 4 (27 enodes)
* * [misc]simplify:  iters left: 3 (32 enodes)
* * [misc]simplify:  iters left: 2 (40 enodes)
* * [misc]simplify:  iters left: 1 (57 enodes)
* [exit]simplify:  Simplified to (- 180 (* (acos v2_y) (/ 180 PI)))
* * * * [misc]progress:  [ 64 / 69 ] simplifiying candidate #<alt-event (λ (v2_y) (- 180 (* (* (cbrt (/ (* (acos v2_y) 180) PI)) (cbrt (/ (* (acos v2_y) 180) PI))) (cbrt (/ (* (acos v2_y) 180) PI)))))>
* [enter]simplify:  Simplifying (- 180 (* (* (cbrt (/ (* (acos v2_y) 180) PI)) (cbrt (/ (* (acos v2_y) 180) PI))) (cbrt (/ (* (acos v2_y) 180) PI))))
* * [misc]simplify:  iters left: 6 (10 enodes)
* * [misc]simplify:  iters left: 5 (16 enodes)
* * [misc]simplify:  iters left: 4 (27 enodes)
* * [misc]simplify:  iters left: 3 (32 enodes)
* * [misc]simplify:  iters left: 2 (40 enodes)
* * [misc]simplify:  iters left: 1 (57 enodes)
* [exit]simplify:  Simplified to (- 180 (* (acos v2_y) (/ 180 PI)))
* * * * [misc]progress:  [ 65 / 69 ] simplifiying candidate #<alt-event (λ (v2_y) (- 180 (* (* (cbrt (/ (* (acos v2_y) 180) PI)) (cbrt (/ (* (acos v2_y) 180) PI))) (cbrt (/ (* (acos v2_y) 180) PI)))))>
* [enter]simplify:  Simplifying (- 180 (* (* (cbrt (/ (* (acos v2_y) 180) PI)) (cbrt (/ (* (acos v2_y) 180) PI))) (cbrt (/ (* (acos v2_y) 180) PI))))
* * [misc]simplify:  iters left: 6 (10 enodes)
* * [misc]simplify:  iters left: 5 (16 enodes)
* * [misc]simplify:  iters left: 4 (27 enodes)
* * [misc]simplify:  iters left: 3 (32 enodes)
* * [misc]simplify:  iters left: 2 (40 enodes)
* * [misc]simplify:  iters left: 1 (57 enodes)
* [exit]simplify:  Simplified to (- 180 (* (acos v2_y) (/ 180 PI)))
* * * * [misc]progress:  [ 66 / 69 ] simplifiying candidate #<alt-event (λ (v2_y) (- 180 (* (* (cbrt (/ (* (acos v2_y) 180) PI)) (cbrt (/ (* (acos v2_y) 180) PI))) (cbrt (/ (* (acos v2_y) 180) PI)))))>
* [enter]simplify:  Simplifying (- 180 (* (* (cbrt (/ (* (acos v2_y) 180) PI)) (cbrt (/ (* (acos v2_y) 180) PI))) (cbrt (/ (* (acos v2_y) 180) PI))))
* * [misc]simplify:  iters left: 6 (10 enodes)
* * [misc]simplify:  iters left: 5 (16 enodes)
* * [misc]simplify:  iters left: 4 (27 enodes)
* * [misc]simplify:  iters left: 3 (32 enodes)
* * [misc]simplify:  iters left: 2 (40 enodes)
* * [misc]simplify:  iters left: 1 (57 enodes)
* [exit]simplify:  Simplified to (- 180 (* (acos v2_y) (/ 180 PI)))
* * * * [misc]progress:  [ 67 / 69 ] simplifiying candidate #<alt-event (λ (v2_y) (- 180 (* (* (cbrt (/ (* (acos v2_y) 180) PI)) (cbrt (/ (* (acos v2_y) 180) PI))) (cbrt (/ (* (acos v2_y) 180) PI)))))>
* [enter]simplify:  Simplifying (- 180 (* (* (cbrt (/ (* (acos v2_y) 180) PI)) (cbrt (/ (* (acos v2_y) 180) PI))) (cbrt (/ (* (acos v2_y) 180) PI))))
* * [misc]simplify:  iters left: 6 (10 enodes)
* * [misc]simplify:  iters left: 5 (16 enodes)
* * [misc]simplify:  iters left: 4 (27 enodes)
* * [misc]simplify:  iters left: 3 (32 enodes)
* * [misc]simplify:  iters left: 2 (40 enodes)
* * [misc]simplify:  iters left: 1 (57 enodes)
* [exit]simplify:  Simplified to (- 180 (* (acos v2_y) (/ 180 PI)))
* * * * [misc]progress:  [ 68 / 69 ] simplifiying candidate #<alt-event (λ (v2_y) (- 180 (* (* (cbrt (/ (* (acos v2_y) 180) PI)) (cbrt (/ (* (acos v2_y) 180) PI))) (cbrt (/ (* (acos v2_y) 180) PI)))))>
* [enter]simplify:  Simplifying (- 180 (* (* (cbrt (/ (* (acos v2_y) 180) PI)) (cbrt (/ (* (acos v2_y) 180) PI))) (cbrt (/ (* (acos v2_y) 180) PI))))
* * [misc]simplify:  iters left: 6 (10 enodes)
* * [misc]simplify:  iters left: 5 (16 enodes)
* * [misc]simplify:  iters left: 4 (27 enodes)
* * [misc]simplify:  iters left: 3 (32 enodes)
* * [misc]simplify:  iters left: 2 (40 enodes)
* * [misc]simplify:  iters left: 1 (57 enodes)
* [exit]simplify:  Simplified to (- 180 (* (acos v2_y) (/ 180 PI)))
* * * * [misc]progress:  [ 69 / 69 ] simplifiying candidate #<alt-event (λ (v2_y) (- 180 (* (* (cbrt (/ (* (acos v2_y) 180) PI)) (cbrt (/ (* (acos v2_y) 180) PI))) (cbrt (/ (* (acos v2_y) 180) PI)))))>
* [enter]simplify:  Simplifying (- 180 (* (* (cbrt (/ (* (acos v2_y) 180) PI)) (cbrt (/ (* (acos v2_y) 180) PI))) (cbrt (/ (* (acos v2_y) 180) PI))))
* * [misc]simplify:  iters left: 6 (10 enodes)
* * [misc]simplify:  iters left: 5 (16 enodes)
* * [misc]simplify:  iters left: 4 (27 enodes)
* * [misc]simplify:  iters left: 3 (32 enodes)
* * [misc]simplify:  iters left: 2 (40 enodes)
* * [misc]simplify:  iters left: 1 (57 enodes)
* [exit]simplify:  Simplified to (- 180 (* (acos v2_y) (/ 180 PI)))
* * * [misc]progress:  adding candidates to table
* [misc]progress:  [Phase 3 of 3] Extracting.
* * [misc]regime-changes:  Finding splitpoints for: (#<alt-delta (λ (v2_y) (- 180 (* (sqrt (/ (* (acos v2_y) 180) PI)) (sqrt (/ (* (acos v2_y) 180) PI)))))> #<alt-delta (λ (v2_y) (- 180 (exp (log (/ (* (acos v2_y) 180) PI)))))> #<alt-event (λ (v2_y) (- 180 (/ (* (acos v2_y) 180) PI)))> #<alt-delta (λ (v2_y) (- 180 (* (* (cbrt (/ (* (acos v2_y) 180) PI)) (cbrt (/ (* (acos v2_y) 180) PI))) (cbrt (/ (* (acos v2_y) 180) PI)))))>)
* [misc]regimes:  Found splitpoints: (#s(sp 0 (- 180 (/ (* (acos v2_y) 180) PI)) +nan.0)) , with alts (#<alt-event (λ (v2_y) (- 180 (/ (* (acos v2_y) 180) PI)))>)
* [enter]simplify:  Simplifying (- 180 (/ (* (acos v2_y) 180) PI))
* * [misc]simplify:  iters left: 6 (7 enodes)
* * [misc]simplify:  iters left: 5 (8 enodes)
* [exit]simplify:  Simplified to (- 180 (/ (* 180 (acos v2_y)) PI))