* [misc]progress:  [Phase 1 of 3] Setting up.
* * * [misc]progress:  [1/2] Preparing points
* * * * [misc]points:  Sampling 256 additional inputs, on iter 0 have 0 / 256
* * * * [misc]points:  Computing exacts on every 16 of 256 points to ramp up precision
* * * * [misc]points:  Setting MPFR precision to 64
* * * * [misc]points:  Setting MPFR precision to 320
* * * * [misc]points:  Computing exacts on every 8 of 256 points to ramp up precision
* * * * [misc]points:  Setting MPFR precision to 64
* * * * [misc]points:  Setting MPFR precision to 320
* * * * [misc]points:  Computing exacts on every 4 of 256 points to ramp up precision
* * * * [misc]points:  Setting MPFR precision to 64
* * * * [misc]points:  Setting MPFR precision to 320
* * * * [misc]points:  Computing exacts on every 2 of 256 points to ramp up precision
* * * * [misc]points:  Setting MPFR precision to 64
* * * * [misc]points:  Setting MPFR precision to 320
* * * * [misc]points:  Computing exacts for 256 points
* * * * [misc]points:  Setting MPFR precision to 64
* * * * [misc]points:  Setting MPFR precision to 320
* * * * [misc]points:  Filtering points with unrepresentable outputs
* * * * [misc]points:  Sampling 120 additional inputs, on iter 1 have 136 / 256
* * * * [misc]points:  Computing exacts on every 7 of 120 points to ramp up precision
* * * * [misc]points:  Setting MPFR precision to 64
* * * * [misc]points:  Setting MPFR precision to 320
* * * * [misc]points:  Computing exacts on every 3 of 120 points to ramp up precision
* * * * [misc]points:  Setting MPFR precision to 64
* * * * [misc]points:  Setting MPFR precision to 320
* * * * [misc]points:  Computing exacts for 120 points
* * * * [misc]points:  Setting MPFR precision to 64
* * * * [misc]points:  Setting MPFR precision to 320
* * * * [misc]points:  Filtering points with unrepresentable outputs
* * * * [misc]points:  Sampling 68 additional inputs, on iter 2 have 188 / 256
* * * * [misc]points:  Computing exacts on every 4 of 68 points to ramp up precision
* * * * [misc]points:  Setting MPFR precision to 64
* * * * [misc]points:  Setting MPFR precision to 320
* * * * [misc]points:  Computing exacts on every 2 of 68 points to ramp up precision
* * * * [misc]points:  Setting MPFR precision to 64
* * * * [misc]points:  Setting MPFR precision to 320
* * * * [misc]points:  Computing exacts for 68 points
* * * * [misc]points:  Setting MPFR precision to 64
* * * * [misc]points:  Setting MPFR precision to 320
* * * * [misc]points:  Filtering points with unrepresentable outputs
* * * * [misc]points:  Sampling 38 additional inputs, on iter 3 have 218 / 256
* * * * [misc]points:  Computing exacts on every 2 of 38 points to ramp up precision
* * * * [misc]points:  Setting MPFR precision to 64
* * * * [misc]points:  Setting MPFR precision to 320
* * * * [misc]points:  Computing exacts for 38 points
* * * * [misc]points:  Setting MPFR precision to 64
* * * * [misc]points:  Setting MPFR precision to 320
* * * * [misc]points:  Filtering points with unrepresentable outputs
* * * * [misc]points:  Sampling 20 additional inputs, on iter 4 have 236 / 256
* * * * [misc]points:  Computing exacts for 20 points
* * * * [misc]points:  Setting MPFR precision to 64
* * * * [misc]points:  Setting MPFR precision to 320
* * * * [misc]points:  Filtering points with unrepresentable outputs
* * * * [misc]points:  Sampling 14 additional inputs, on iter 5 have 242 / 256
* * * * [misc]points:  Computing exacts for 14 points
* * * * [misc]points:  Setting MPFR precision to 64
* * * * [misc]points:  Setting MPFR precision to 320
* * * * [misc]points:  Filtering points with unrepresentable outputs
* * * * [misc]points:  Sampling 6 additional inputs, on iter 6 have 250 / 256
* * * * [misc]points:  Computing exacts for 6 points
* * * * [misc]points:  Setting MPFR precision to 64
* * * * [misc]points:  Setting MPFR precision to 320
* * * * [misc]points:  Filtering points with unrepresentable outputs
* * * * [misc]points:  Sampling 4 additional inputs, on iter 7 have 254 / 256
* * * * [misc]points:  Computing exacts for 4 points
* * * * [misc]points:  Setting MPFR precision to 64
* * * * [misc]points:  Setting MPFR precision to 320
* * * * [misc]points:  Filtering points with unrepresentable outputs
* * * * [exit]points:  Sampled 256 points with exact outputs
* * * [misc]progress:  [2/2] Setting up program.
* [misc]progress:  [Phase 2 of 3] Improving.
* [enter]simplify:  Simplifying (/ a (- (acos a)))
* * [misc]simplify:  iters left: 5 (4 enodes)
* [exit]simplify:  Simplified to (/ a (- (acos a)))
* * [misc]progress:  iteration 1 / 4
* * * [misc]progress:  picking best candidate
* * * * [misc]pick:  Picked  #<alt (λ (a) (/ a (- (acos a))))>
* * * [misc]progress:  localizing error
* * * [misc]progress:  generating rewritten candidates
* * * * [misc]progress:  [ 1 / 1 ] rewriting at (2)
* * * [misc]progress:  generating series expansions
* * * * [misc]progress:  [ 1 / 1 ] generating series at (2)
* [misc]approximate:  Taking taylor expansion of (/ a (- (acos a))) in (a) around 0
* [misc]taylor:  Taking taylor expansion of (/ a (- (acos a))) in a
* [misc]taylor:  Taking taylor expansion of a in a
* [misc]backup-simplify:  Simplify 0 into 0
* [misc]backup-simplify:  Simplify 1 into 1
* [misc]taylor:  Taking taylor expansion of (- (acos a)) in a
* [misc]taylor:  Taking taylor expansion of (acos a) in a
* [misc]backup-simplify:  Simplify (acos a) into (acos a)
* [misc]backup-simplify:  Simplify (- (acos a)) into (- (acos a))
* [misc]backup-simplify:  Simplify (- (acos a)) into (- (acos a))
* [misc]backup-simplify:  Simplify (/ 1 (- (acos a))) into (/ -1 (acos a))
* [misc]taylor:  Taking taylor expansion of (/ a (- (acos a))) in a
* [misc]taylor:  Taking taylor expansion of a in a
* [misc]backup-simplify:  Simplify 0 into 0
* [misc]backup-simplify:  Simplify 1 into 1
* [misc]taylor:  Taking taylor expansion of (- (acos a)) in a
* [misc]taylor:  Taking taylor expansion of (acos a) in a
* [misc]backup-simplify:  Simplify (acos a) into (acos a)
* [misc]backup-simplify:  Simplify (- (acos a)) into (- (acos a))
* [misc]backup-simplify:  Simplify (- (acos a)) into (- (acos a))
* [misc]backup-simplify:  Simplify (/ 1 (- (acos a))) into (/ -1 (acos a))
* [misc]backup-simplify:  Simplify (/ -1 (acos a)) into (/ -1 (acos a))
* [misc]backup-simplify:  Simplify (- (acos a)) into (- (acos a))
* [misc]backup-simplify:  Simplify (- 0) into 0
* [misc]backup-simplify:  Simplify (- (acos a)) into (- (acos a))
* [misc]backup-simplify:  Simplify (- (/ 0 (- (acos a))) (+ (* (/ -1 (acos a)) (/ 0 (- (acos a)))))) into 0
* [misc]backup-simplify:  Simplify 0 into 0
* [misc]backup-simplify:  Simplify (- (acos a)) into (- (acos a))
* [misc]backup-simplify:  Simplify (- 0) into 0
* [misc]backup-simplify:  Simplify (- (acos a)) into (- (acos a))
* [misc]backup-simplify:  Simplify (- 0) into 0
* [misc]backup-simplify:  Simplify (- (acos a)) into (- (acos a))
* [misc]backup-simplify:  Simplify (- (/ 0 (- (acos a))) (+ (* (/ -1 (acos a)) (/ 0 (- (acos a)))) (* 0 (/ 0 (- (acos a)))))) into 0
* [misc]backup-simplify:  Simplify 0 into 0
* [misc]backup-simplify:  Simplify (- (acos a)) into (- (acos a))
* [misc]backup-simplify:  Simplify (- 0) into 0
* [misc]backup-simplify:  Simplify (- (acos a)) into (- (acos a))
* [misc]backup-simplify:  Simplify (- 0) into 0
* [misc]backup-simplify:  Simplify (- (acos a)) into (- (acos a))
* [misc]backup-simplify:  Simplify (- 0) into 0
* [misc]backup-simplify:  Simplify (- (acos a)) into (- (acos a))
* [misc]backup-simplify:  Simplify (- (/ 0 (- (acos a))) (+ (* (/ -1 (acos a)) (/ 0 (- (acos a)))) (* 0 (/ 0 (- (acos a)))) (* 0 (/ 0 (- (acos a)))))) into 0
* [misc]backup-simplify:  Simplify 0 into 0
* [misc]backup-simplify:  Simplify (- (acos a)) into (- (acos a))
* [misc]backup-simplify:  Simplify (- 0) into 0
* [misc]backup-simplify:  Simplify (- (acos a)) into (- (acos a))
* [misc]backup-simplify:  Simplify (- 0) into 0
* [misc]backup-simplify:  Simplify (- (acos a)) into (- (acos a))
* [misc]backup-simplify:  Simplify (- 0) into 0
* [misc]backup-simplify:  Simplify (- (acos a)) into (- (acos a))
* [misc]backup-simplify:  Simplify (- 0) into 0
* [misc]backup-simplify:  Simplify (- (acos a)) into (- (acos a))
* [misc]backup-simplify:  Simplify (- (/ 0 (- (acos a))) (+ (* (/ -1 (acos a)) (/ 0 (- (acos a)))) (* 0 (/ 0 (- (acos a)))) (* 0 (/ 0 (- (acos a)))) (* 0 (/ 0 (- (acos a)))))) into 0
* [misc]backup-simplify:  Simplify 0 into 0
* [misc]backup-simplify:  Simplify (- (acos a)) into (- (acos a))
* [misc]backup-simplify:  Simplify (- 0) into 0
* [misc]backup-simplify:  Simplify (- (acos a)) into (- (acos a))
* [misc]backup-simplify:  Simplify (- 0) into 0
* [misc]backup-simplify:  Simplify (- (acos a)) into (- (acos a))
* [misc]backup-simplify:  Simplify (- 0) into 0
* [misc]backup-simplify:  Simplify (- (acos a)) into (- (acos a))
* [misc]backup-simplify:  Simplify (- 0) into 0
* [misc]backup-simplify:  Simplify (- (acos a)) into (- (acos a))
* [misc]backup-simplify:  Simplify (- 0) into 0
* [misc]backup-simplify:  Simplify (- (acos a)) into (- (acos a))
* [misc]backup-simplify:  Simplify (- (/ 0 (- (acos a))) (+ (* (/ -1 (acos a)) (/ 0 (- (acos a)))) (* 0 (/ 0 (- (acos a)))) (* 0 (/ 0 (- (acos a)))) (* 0 (/ 0 (- (acos a)))) (* 0 (/ 0 (- (acos a)))))) into 0
* [misc]backup-simplify:  Simplify 0 into 0
* [misc]backup-simplify:  Simplify (- (acos a)) into (- (acos a))
* [misc]backup-simplify:  Simplify (- 0) into 0
* [misc]backup-simplify:  Simplify (- (acos a)) into (- (acos a))
* [misc]backup-simplify:  Simplify (- 0) into 0
* [misc]backup-simplify:  Simplify (- (acos a)) into (- (acos a))
* [misc]backup-simplify:  Simplify (- 0) into 0
* [misc]backup-simplify:  Simplify (- (acos a)) into (- (acos a))
* [misc]backup-simplify:  Simplify (- 0) into 0
* [misc]backup-simplify:  Simplify (- (acos a)) into (- (acos a))
* [misc]backup-simplify:  Simplify (- 0) into 0
* [misc]backup-simplify:  Simplify (- (acos a)) into (- (acos a))
* [misc]backup-simplify:  Simplify (- 0) into 0
* [misc]backup-simplify:  Simplify (- (acos a)) into (- (acos a))
* [misc]backup-simplify:  Simplify (- (/ 0 (- (acos a))) (+ (* (/ -1 (acos a)) (/ 0 (- (acos a)))) (* 0 (/ 0 (- (acos a)))) (* 0 (/ 0 (- (acos a)))) (* 0 (/ 0 (- (acos a)))) (* 0 (/ 0 (- (acos a)))) (* 0 (/ 0 (- (acos a)))))) into 0
* [misc]backup-simplify:  Simplify 0 into 0
* [misc]backup-simplify:  Simplify (* (/ -1 (acos a)) a) into (* -1 (/ a (acos a)))
* [misc]approximate:  Taking taylor expansion of (/ (/ 1 a) (- (acos (/ 1 a)))) in (a) around 0
* [misc]taylor:  Taking taylor expansion of (/ (/ 1 a) (- (acos (/ 1 a)))) in a
* [misc]taylor:  Taking taylor expansion of (/ 1 a) in a
* [misc]taylor:  Taking taylor expansion of a in a
* [misc]backup-simplify:  Simplify 0 into 0
* [misc]backup-simplify:  Simplify 1 into 1
* [misc]backup-simplify:  Simplify (/ 1 1) into 1
* [misc]taylor:  Taking taylor expansion of (- (acos (/ 1 a))) in a
* [misc]taylor:  Taking taylor expansion of (acos (/ 1 a)) in a
* [misc]backup-simplify:  Simplify (acos (/ 1 a)) into (acos (/ 1 a))
* [misc]backup-simplify:  Simplify (- (acos (/ 1 a))) into (- (acos (/ 1 a)))
* [misc]backup-simplify:  Simplify (- (acos (/ 1 a))) into (- (acos (/ 1 a)))
* [misc]backup-simplify:  Simplify (/ 1 (- (acos (/ 1 a)))) into (/ -1 (acos (/ 1 a)))
* [misc]taylor:  Taking taylor expansion of (/ (/ 1 a) (- (acos (/ 1 a)))) in a
* [misc]taylor:  Taking taylor expansion of (/ 1 a) in a
* [misc]taylor:  Taking taylor expansion of a in a
* [misc]backup-simplify:  Simplify 0 into 0
* [misc]backup-simplify:  Simplify 1 into 1
* [misc]backup-simplify:  Simplify (/ 1 1) into 1
* [misc]taylor:  Taking taylor expansion of (- (acos (/ 1 a))) in a
* [misc]taylor:  Taking taylor expansion of (acos (/ 1 a)) in a
* [misc]backup-simplify:  Simplify (acos (/ 1 a)) into (acos (/ 1 a))
* [misc]backup-simplify:  Simplify (- (acos (/ 1 a))) into (- (acos (/ 1 a)))
* [misc]backup-simplify:  Simplify (- (acos (/ 1 a))) into (- (acos (/ 1 a)))
* [misc]backup-simplify:  Simplify (/ 1 (- (acos (/ 1 a)))) into (/ -1 (acos (/ 1 a)))
* [misc]backup-simplify:  Simplify (/ -1 (acos (/ 1 a))) into (/ -1 (acos (/ 1 a)))
* [misc]backup-simplify:  Simplify (- (+ (* 1 (/ 0 1)))) into 0
* [misc]backup-simplify:  Simplify (- (acos (/ 1 a))) into (- (acos (/ 1 a)))
* [misc]backup-simplify:  Simplify (- 0) into 0
* [misc]backup-simplify:  Simplify (- (acos (/ 1 a))) into (- (acos (/ 1 a)))
* [misc]backup-simplify:  Simplify (- (/ 0 (- (acos (/ 1 a)))) (+ (* (/ -1 (acos (/ 1 a))) (/ 0 (- (acos (/ 1 a))))))) into 0
* [misc]backup-simplify:  Simplify 0 into 0
* [misc]backup-simplify:  Simplify (- (+ (* 1 (/ 0 1)) (* 0 (/ 0 1)))) into 0
* [misc]backup-simplify:  Simplify (- (acos (/ 1 a))) into (- (acos (/ 1 a)))
* [misc]backup-simplify:  Simplify (- 0) into 0
* [misc]backup-simplify:  Simplify (- (acos (/ 1 a))) into (- (acos (/ 1 a)))
* [misc]backup-simplify:  Simplify (- 0) into 0
* [misc]backup-simplify:  Simplify (- (acos (/ 1 a))) into (- (acos (/ 1 a)))
* [misc]backup-simplify:  Simplify (- (/ 0 (- (acos (/ 1 a)))) (+ (* (/ -1 (acos (/ 1 a))) (/ 0 (- (acos (/ 1 a))))) (* 0 (/ 0 (- (acos (/ 1 a))))))) into 0
* [misc]backup-simplify:  Simplify 0 into 0
* [misc]backup-simplify:  Simplify (- (+ (* 1 (/ 0 1)) (* 0 (/ 0 1)) (* 0 (/ 0 1)))) into 0
* [misc]backup-simplify:  Simplify (- (acos (/ 1 a))) into (- (acos (/ 1 a)))
* [misc]backup-simplify:  Simplify (- 0) into 0
* [misc]backup-simplify:  Simplify (- (acos (/ 1 a))) into (- (acos (/ 1 a)))
* [misc]backup-simplify:  Simplify (- 0) into 0
* [misc]backup-simplify:  Simplify (- (acos (/ 1 a))) into (- (acos (/ 1 a)))
* [misc]backup-simplify:  Simplify (- 0) into 0
* [misc]backup-simplify:  Simplify (- (acos (/ 1 a))) into (- (acos (/ 1 a)))
* [misc]backup-simplify:  Simplify (- (/ 0 (- (acos (/ 1 a)))) (+ (* (/ -1 (acos (/ 1 a))) (/ 0 (- (acos (/ 1 a))))) (* 0 (/ 0 (- (acos (/ 1 a))))) (* 0 (/ 0 (- (acos (/ 1 a))))))) into 0
* [misc]backup-simplify:  Simplify 0 into 0
* [misc]backup-simplify:  Simplify (- (+ (* 1 (/ 0 1)) (* 0 (/ 0 1)) (* 0 (/ 0 1)) (* 0 (/ 0 1)))) into 0
* [misc]backup-simplify:  Simplify (- (acos (/ 1 a))) into (- (acos (/ 1 a)))
* [misc]backup-simplify:  Simplify (- 0) into 0
* [misc]backup-simplify:  Simplify (- (acos (/ 1 a))) into (- (acos (/ 1 a)))
* [misc]backup-simplify:  Simplify (- 0) into 0
* [misc]backup-simplify:  Simplify (- (acos (/ 1 a))) into (- (acos (/ 1 a)))
* [misc]backup-simplify:  Simplify (- 0) into 0
* [misc]backup-simplify:  Simplify (- (acos (/ 1 a))) into (- (acos (/ 1 a)))
* [misc]backup-simplify:  Simplify (- 0) into 0
* [misc]backup-simplify:  Simplify (- (acos (/ 1 a))) into (- (acos (/ 1 a)))
* [misc]backup-simplify:  Simplify (- (/ 0 (- (acos (/ 1 a)))) (+ (* (/ -1 (acos (/ 1 a))) (/ 0 (- (acos (/ 1 a))))) (* 0 (/ 0 (- (acos (/ 1 a))))) (* 0 (/ 0 (- (acos (/ 1 a))))) (* 0 (/ 0 (- (acos (/ 1 a))))))) into 0
* [misc]backup-simplify:  Simplify 0 into 0
* [misc]backup-simplify:  Simplify (- (+ (* 1 (/ 0 1)) (* 0 (/ 0 1)) (* 0 (/ 0 1)) (* 0 (/ 0 1)) (* 0 (/ 0 1)))) into 0
* [misc]backup-simplify:  Simplify (- (acos (/ 1 a))) into (- (acos (/ 1 a)))
* [misc]backup-simplify:  Simplify (- 0) into 0
* [misc]backup-simplify:  Simplify (- (acos (/ 1 a))) into (- (acos (/ 1 a)))
* [misc]backup-simplify:  Simplify (- 0) into 0
* [misc]backup-simplify:  Simplify (- (acos (/ 1 a))) into (- (acos (/ 1 a)))
* [misc]backup-simplify:  Simplify (- 0) into 0
* [misc]backup-simplify:  Simplify (- (acos (/ 1 a))) into (- (acos (/ 1 a)))
* [misc]backup-simplify:  Simplify (- 0) into 0
* [misc]backup-simplify:  Simplify (- (acos (/ 1 a))) into (- (acos (/ 1 a)))
* [misc]backup-simplify:  Simplify (- 0) into 0
* [misc]backup-simplify:  Simplify (- (acos (/ 1 a))) into (- (acos (/ 1 a)))
* [misc]backup-simplify:  Simplify (- (/ 0 (- (acos (/ 1 a)))) (+ (* (/ -1 (acos (/ 1 a))) (/ 0 (- (acos (/ 1 a))))) (* 0 (/ 0 (- (acos (/ 1 a))))) (* 0 (/ 0 (- (acos (/ 1 a))))) (* 0 (/ 0 (- (acos (/ 1 a))))) (* 0 (/ 0 (- (acos (/ 1 a))))))) into 0
* [misc]backup-simplify:  Simplify 0 into 0
* [misc]backup-simplify:  Simplify (- (+ (* 1 (/ 0 1)) (* 0 (/ 0 1)) (* 0 (/ 0 1)) (* 0 (/ 0 1)) (* 0 (/ 0 1)) (* 0 (/ 0 1)))) into 0
* [misc]backup-simplify:  Simplify (- (acos (/ 1 a))) into (- (acos (/ 1 a)))
* [misc]backup-simplify:  Simplify (- 0) into 0
* [misc]backup-simplify:  Simplify (- (acos (/ 1 a))) into (- (acos (/ 1 a)))
* [misc]backup-simplify:  Simplify (- 0) into 0
* [misc]backup-simplify:  Simplify (- (acos (/ 1 a))) into (- (acos (/ 1 a)))
* [misc]backup-simplify:  Simplify (- 0) into 0
* [misc]backup-simplify:  Simplify (- (acos (/ 1 a))) into (- (acos (/ 1 a)))
* [misc]backup-simplify:  Simplify (- 0) into 0
* [misc]backup-simplify:  Simplify (- (acos (/ 1 a))) into (- (acos (/ 1 a)))
* [misc]backup-simplify:  Simplify (- 0) into 0
* [misc]backup-simplify:  Simplify (- (acos (/ 1 a))) into (- (acos (/ 1 a)))
* [misc]backup-simplify:  Simplify (- 0) into 0
* [misc]backup-simplify:  Simplify (- (acos (/ 1 a))) into (- (acos (/ 1 a)))
* [misc]backup-simplify:  Simplify (- (/ 0 (- (acos (/ 1 a)))) (+ (* (/ -1 (acos (/ 1 a))) (/ 0 (- (acos (/ 1 a))))) (* 0 (/ 0 (- (acos (/ 1 a))))) (* 0 (/ 0 (- (acos (/ 1 a))))) (* 0 (/ 0 (- (acos (/ 1 a))))) (* 0 (/ 0 (- (acos (/ 1 a))))) (* 0 (/ 0 (- (acos (/ 1 a))))))) into 0
* [misc]backup-simplify:  Simplify 0 into 0
* [misc]backup-simplify:  Simplify (* (/ -1 (acos (/ 1 (/ 1 a)))) (/ 1 (/ 1 a))) into (* -1 (/ a (acos a)))
* [misc]approximate:  Taking taylor expansion of (/ (/ 1 (- a)) (- (acos (/ 1 (- a))))) in (a) around 0
* [misc]taylor:  Taking taylor expansion of (/ (/ 1 (- a)) (- (acos (/ 1 (- a))))) in a
* [misc]taylor:  Taking taylor expansion of (/ 1 (- a)) in a
* [misc]taylor:  Taking taylor expansion of (- a) in a
* [misc]taylor:  Taking taylor expansion of a in a
* [misc]backup-simplify:  Simplify 0 into 0
* [misc]backup-simplify:  Simplify 1 into 1
* [misc]backup-simplify:  Simplify (- 0) into 0
* [misc]backup-simplify:  Simplify (- 1) into -1
* [misc]backup-simplify:  Simplify (- 1) into -1
* [misc]backup-simplify:  Simplify (/ 1 -1) into -1
* [misc]taylor:  Taking taylor expansion of (- (acos (/ 1 (- a)))) in a
* [misc]taylor:  Taking taylor expansion of (acos (/ 1 (- a))) in a
* [misc]backup-simplify:  Simplify (acos (/ 1 (- a))) into (acos (/ -1 a))
* [misc]backup-simplify:  Simplify (- (acos (/ -1 a))) into (- (acos (/ -1 a)))
* [misc]backup-simplify:  Simplify (- (acos (/ -1 a))) into (- (acos (/ -1 a)))
* [misc]backup-simplify:  Simplify (/ -1 (- (acos (/ -1 a)))) into (/ 1 (acos (/ -1 a)))
* [misc]taylor:  Taking taylor expansion of (/ (/ 1 (- a)) (- (acos (/ 1 (- a))))) in a
* [misc]taylor:  Taking taylor expansion of (/ 1 (- a)) in a
* [misc]taylor:  Taking taylor expansion of (- a) in a
* [misc]taylor:  Taking taylor expansion of a in a
* [misc]backup-simplify:  Simplify 0 into 0
* [misc]backup-simplify:  Simplify 1 into 1
* [misc]backup-simplify:  Simplify (- 0) into 0
* [misc]backup-simplify:  Simplify (- 1) into -1
* [misc]backup-simplify:  Simplify (- 1) into -1
* [misc]backup-simplify:  Simplify (/ 1 -1) into -1
* [misc]taylor:  Taking taylor expansion of (- (acos (/ 1 (- a)))) in a
* [misc]taylor:  Taking taylor expansion of (acos (/ 1 (- a))) in a
* [misc]backup-simplify:  Simplify (acos (/ 1 (- a))) into (acos (/ -1 a))
* [misc]backup-simplify:  Simplify (- (acos (/ -1 a))) into (- (acos (/ -1 a)))
* [misc]backup-simplify:  Simplify (- (acos (/ -1 a))) into (- (acos (/ -1 a)))
* [misc]backup-simplify:  Simplify (/ -1 (- (acos (/ -1 a)))) into (/ 1 (acos (/ -1 a)))
* [misc]backup-simplify:  Simplify (/ 1 (acos (/ -1 a))) into (/ 1 (acos (/ -1 a)))
* [misc]backup-simplify:  Simplify (- 0) into 0
* [misc]backup-simplify:  Simplify (- 1) into -1
* [misc]backup-simplify:  Simplify (- (+ (* -1 (/ 0 -1)))) into 0
* [misc]backup-simplify:  Simplify (- (acos (/ -1 a))) into (- (acos (/ -1 a)))
* [misc]backup-simplify:  Simplify (- 0) into 0
* [misc]backup-simplify:  Simplify (- (acos (/ -1 a))) into (- (acos (/ -1 a)))
* [misc]backup-simplify:  Simplify (- (/ 0 (- (acos (/ -1 a)))) (+ (* (/ 1 (acos (/ -1 a))) (/ 0 (- (acos (/ -1 a))))))) into 0
* [misc]backup-simplify:  Simplify 0 into 0
* [misc]backup-simplify:  Simplify (- 0) into 0
* [misc]backup-simplify:  Simplify (- 1) into -1
* [misc]backup-simplify:  Simplify (- 0) into 0
* [misc]backup-simplify:  Simplify (- 1) into -1
* [misc]backup-simplify:  Simplify (- (+ (* -1 (/ 0 -1)) (* 0 (/ 0 -1)))) into 0
* [misc]backup-simplify:  Simplify (- (acos (/ -1 a))) into (- (acos (/ -1 a)))
* [misc]backup-simplify:  Simplify (- 0) into 0
* [misc]backup-simplify:  Simplify (- (acos (/ -1 a))) into (- (acos (/ -1 a)))
* [misc]backup-simplify:  Simplify (- 0) into 0
* [misc]backup-simplify:  Simplify (- (acos (/ -1 a))) into (- (acos (/ -1 a)))
* [misc]backup-simplify:  Simplify (- (/ 0 (- (acos (/ -1 a)))) (+ (* (/ 1 (acos (/ -1 a))) (/ 0 (- (acos (/ -1 a))))) (* 0 (/ 0 (- (acos (/ -1 a))))))) into 0
* [misc]backup-simplify:  Simplify 0 into 0
* [misc]backup-simplify:  Simplify (- 0) into 0
* [misc]backup-simplify:  Simplify (- 1) into -1
* [misc]backup-simplify:  Simplify (- 0) into 0
* [misc]backup-simplify:  Simplify (- 1) into -1
* [misc]backup-simplify:  Simplify (- 0) into 0
* [misc]backup-simplify:  Simplify (- 1) into -1
* [misc]backup-simplify:  Simplify (- (+ (* -1 (/ 0 -1)) (* 0 (/ 0 -1)) (* 0 (/ 0 -1)))) into 0
* [misc]backup-simplify:  Simplify (- (acos (/ -1 a))) into (- (acos (/ -1 a)))
* [misc]backup-simplify:  Simplify (- 0) into 0
* [misc]backup-simplify:  Simplify (- (acos (/ -1 a))) into (- (acos (/ -1 a)))
* [misc]backup-simplify:  Simplify (- 0) into 0
* [misc]backup-simplify:  Simplify (- (acos (/ -1 a))) into (- (acos (/ -1 a)))
* [misc]backup-simplify:  Simplify (- 0) into 0
* [misc]backup-simplify:  Simplify (- (acos (/ -1 a))) into (- (acos (/ -1 a)))
* [misc]backup-simplify:  Simplify (- (/ 0 (- (acos (/ -1 a)))) (+ (* (/ 1 (acos (/ -1 a))) (/ 0 (- (acos (/ -1 a))))) (* 0 (/ 0 (- (acos (/ -1 a))))) (* 0 (/ 0 (- (acos (/ -1 a))))))) into 0
* [misc]backup-simplify:  Simplify 0 into 0
* [misc]backup-simplify:  Simplify (- 0) into 0
* [misc]backup-simplify:  Simplify (- 1) into -1
* [misc]backup-simplify:  Simplify (- 0) into 0
* [misc]backup-simplify:  Simplify (- 1) into -1
* [misc]backup-simplify:  Simplify (- 0) into 0
* [misc]backup-simplify:  Simplify (- 1) into -1
* [misc]backup-simplify:  Simplify (- 0) into 0
* [misc]backup-simplify:  Simplify (- 1) into -1
* [misc]backup-simplify:  Simplify (- (+ (* -1 (/ 0 -1)) (* 0 (/ 0 -1)) (* 0 (/ 0 -1)) (* 0 (/ 0 -1)))) into 0
* [misc]backup-simplify:  Simplify (- (acos (/ -1 a))) into (- (acos (/ -1 a)))
* [misc]backup-simplify:  Simplify (- 0) into 0
* [misc]backup-simplify:  Simplify (- (acos (/ -1 a))) into (- (acos (/ -1 a)))
* [misc]backup-simplify:  Simplify (- 0) into 0
* [misc]backup-simplify:  Simplify (- (acos (/ -1 a))) into (- (acos (/ -1 a)))
* [misc]backup-simplify:  Simplify (- 0) into 0
* [misc]backup-simplify:  Simplify (- (acos (/ -1 a))) into (- (acos (/ -1 a)))
* [misc]backup-simplify:  Simplify (- 0) into 0
* [misc]backup-simplify:  Simplify (- (acos (/ -1 a))) into (- (acos (/ -1 a)))
* [misc]backup-simplify:  Simplify (- (/ 0 (- (acos (/ -1 a)))) (+ (* (/ 1 (acos (/ -1 a))) (/ 0 (- (acos (/ -1 a))))) (* 0 (/ 0 (- (acos (/ -1 a))))) (* 0 (/ 0 (- (acos (/ -1 a))))) (* 0 (/ 0 (- (acos (/ -1 a))))))) into 0
* [misc]backup-simplify:  Simplify 0 into 0
* [misc]backup-simplify:  Simplify (- 0) into 0
* [misc]backup-simplify:  Simplify (- 1) into -1
* [misc]backup-simplify:  Simplify (- 0) into 0
* [misc]backup-simplify:  Simplify (- 1) into -1
* [misc]backup-simplify:  Simplify (- 0) into 0
* [misc]backup-simplify:  Simplify (- 1) into -1
* [misc]backup-simplify:  Simplify (- 0) into 0
* [misc]backup-simplify:  Simplify (- 1) into -1
* [misc]backup-simplify:  Simplify (- 0) into 0
* [misc]backup-simplify:  Simplify (- 1) into -1
* [misc]backup-simplify:  Simplify (- (+ (* -1 (/ 0 -1)) (* 0 (/ 0 -1)) (* 0 (/ 0 -1)) (* 0 (/ 0 -1)) (* 0 (/ 0 -1)))) into 0
* [misc]backup-simplify:  Simplify (- (acos (/ -1 a))) into (- (acos (/ -1 a)))
* [misc]backup-simplify:  Simplify (- 0) into 0
* [misc]backup-simplify:  Simplify (- (acos (/ -1 a))) into (- (acos (/ -1 a)))
* [misc]backup-simplify:  Simplify (- 0) into 0
* [misc]backup-simplify:  Simplify (- (acos (/ -1 a))) into (- (acos (/ -1 a)))
* [misc]backup-simplify:  Simplify (- 0) into 0
* [misc]backup-simplify:  Simplify (- (acos (/ -1 a))) into (- (acos (/ -1 a)))
* [misc]backup-simplify:  Simplify (- 0) into 0
* [misc]backup-simplify:  Simplify (- (acos (/ -1 a))) into (- (acos (/ -1 a)))
* [misc]backup-simplify:  Simplify (- 0) into 0
* [misc]backup-simplify:  Simplify (- (acos (/ -1 a))) into (- (acos (/ -1 a)))
* [misc]backup-simplify:  Simplify (- (/ 0 (- (acos (/ -1 a)))) (+ (* (/ 1 (acos (/ -1 a))) (/ 0 (- (acos (/ -1 a))))) (* 0 (/ 0 (- (acos (/ -1 a))))) (* 0 (/ 0 (- (acos (/ -1 a))))) (* 0 (/ 0 (- (acos (/ -1 a))))) (* 0 (/ 0 (- (acos (/ -1 a))))))) into 0
* [misc]backup-simplify:  Simplify 0 into 0
* [misc]backup-simplify:  Simplify (- 0) into 0
* [misc]backup-simplify:  Simplify (- 1) into -1
* [misc]backup-simplify:  Simplify (- 0) into 0
* [misc]backup-simplify:  Simplify (- 1) into -1
* [misc]backup-simplify:  Simplify (- 0) into 0
* [misc]backup-simplify:  Simplify (- 1) into -1
* [misc]backup-simplify:  Simplify (- 0) into 0
* [misc]backup-simplify:  Simplify (- 1) into -1
* [misc]backup-simplify:  Simplify (- 0) into 0
* [misc]backup-simplify:  Simplify (- 1) into -1
* [misc]backup-simplify:  Simplify (- 0) into 0
* [misc]backup-simplify:  Simplify (- 1) into -1
* [misc]backup-simplify:  Simplify (- (+ (* -1 (/ 0 -1)) (* 0 (/ 0 -1)) (* 0 (/ 0 -1)) (* 0 (/ 0 -1)) (* 0 (/ 0 -1)) (* 0 (/ 0 -1)))) into 0
* [misc]backup-simplify:  Simplify (- (acos (/ -1 a))) into (- (acos (/ -1 a)))
* [misc]backup-simplify:  Simplify (- 0) into 0
* [misc]backup-simplify:  Simplify (- (acos (/ -1 a))) into (- (acos (/ -1 a)))
* [misc]backup-simplify:  Simplify (- 0) into 0
* [misc]backup-simplify:  Simplify (- (acos (/ -1 a))) into (- (acos (/ -1 a)))
* [misc]backup-simplify:  Simplify (- 0) into 0
* [misc]backup-simplify:  Simplify (- (acos (/ -1 a))) into (- (acos (/ -1 a)))
* [misc]backup-simplify:  Simplify (- 0) into 0
* [misc]backup-simplify:  Simplify (- (acos (/ -1 a))) into (- (acos (/ -1 a)))
* [misc]backup-simplify:  Simplify (- 0) into 0
* [misc]backup-simplify:  Simplify (- (acos (/ -1 a))) into (- (acos (/ -1 a)))
* [misc]backup-simplify:  Simplify (- 0) into 0
* [misc]backup-simplify:  Simplify (- (acos (/ -1 a))) into (- (acos (/ -1 a)))
* [misc]backup-simplify:  Simplify (- (/ 0 (- (acos (/ -1 a)))) (+ (* (/ 1 (acos (/ -1 a))) (/ 0 (- (acos (/ -1 a))))) (* 0 (/ 0 (- (acos (/ -1 a))))) (* 0 (/ 0 (- (acos (/ -1 a))))) (* 0 (/ 0 (- (acos (/ -1 a))))) (* 0 (/ 0 (- (acos (/ -1 a))))) (* 0 (/ 0 (- (acos (/ -1 a))))))) into 0
* [misc]backup-simplify:  Simplify 0 into 0
* [misc]backup-simplify:  Simplify (* (/ 1 (acos (/ -1 (/ 1 (- a))))) (/ 1 (/ 1 (- a)))) into (* -1 (/ a (acos a)))
* * * [misc]progress:  simplifying candidates
* * * * [misc]progress:  [ 1 / 25 ] simplifiying candidate #<alt (λ (a) (log1p (expm1 (/ a (- (acos a))))))>
* * * * [misc]progress:  [ 2 / 25 ] simplifiying candidate #<alt (λ (a) (expm1 (log1p (/ a (- (acos a))))))>
* * * * [misc]progress:  [ 3 / 25 ] simplifiying candidate #<alt (λ (a) (pow (/ a (- (acos a))) 1))>
* * * * [misc]progress:  [ 4 / 25 ] simplifiying candidate #<alt (λ (a) (exp (log (/ a (- (acos a))))))>
* * * * [misc]progress:  [ 5 / 25 ] simplifiying candidate #<alt (λ (a) (log (exp (/ a (- (acos a))))))>
* * * * [misc]progress:  [ 6 / 25 ] simplifiying candidate #<alt (λ (a) (* (* (cbrt (/ a (- (acos a)))) (cbrt (/ a (- (acos a))))) (cbrt (/ a (- (acos a))))))>
* * * * [misc]progress:  [ 7 / 25 ] simplifiying candidate #<alt (λ (a) (cbrt (* (* (/ a (- (acos a))) (/ a (- (acos a)))) (/ a (- (acos a))))))>
* * * * [misc]progress:  [ 8 / 25 ] simplifiying candidate #<alt (λ (a) (* (sqrt (/ a (- (acos a)))) (sqrt (/ a (- (acos a))))))>
* * * * [misc]progress:  [ 9 / 25 ] simplifiying candidate #<alt (λ (a) (/ (- a) (- (- (acos a)))))>
* * * * [misc]progress:  [ 10 / 25 ] simplifiying candidate #<alt (λ (a) (* 1 (/ a (- (acos a)))))>
* * * * [misc]progress:  [ 11 / 25 ] simplifiying candidate #<alt (λ (a) (* a (/ 1 (- (acos a)))))>
* * * * [misc]progress:  [ 12 / 25 ] simplifiying candidate #<alt (λ (a) (/ 1 (/ (- (acos a)) a)))>
* * * * [misc]progress:  [ 13 / 25 ] simplifiying candidate #<alt (λ (a) (/ (/ a (* (cbrt (- (acos a))) (cbrt (- (acos a))))) (cbrt (- (acos a)))))>
* [enter]simplify:  Simplifying (cbrt (- (acos a)))
* * [misc]simplify:  iters left: 4 (4 enodes)
* [exit]simplify:  Simplified to (cbrt (- (acos a)))
* [misc]simplify:  Simplified (2 2) to (λ (a) (/ (/ a (* (cbrt (- (acos a))) (cbrt (- (acos a))))) (cbrt (- (acos a)))))
* * * * [misc]progress:  [ 14 / 25 ] simplifiying candidate #<alt (λ (a) (/ (/ a (sqrt (- (acos a)))) (sqrt (- (acos a)))))>
* [enter]simplify:  Simplifying (sqrt (- (acos a)))
* * [misc]simplify:  iters left: 4 (4 enodes)
* [exit]simplify:  Simplified to (sqrt (- (acos a)))
* [misc]simplify:  Simplified (2 2) to (λ (a) (/ (/ a (sqrt (- (acos a)))) (sqrt (- (acos a)))))
* * * * [misc]progress:  [ 15 / 25 ] simplifiying candidate #<alt (λ (a) (/ (/ a 1) (- (acos a))))>
* [enter]simplify:  Simplifying (- (acos a))
* * [misc]simplify:  iters left: 3 (3 enodes)
* [exit]simplify:  Simplified to (- (acos a))
* [misc]simplify:  Simplified (2 2) to (λ (a) (/ (/ a 1) (- (acos a))))
* * * * [misc]progress:  [ 16 / 25 ] simplifiying candidate #<alt (λ (a) (/ (/ a -1) (acos a)))>
* [enter]simplify:  Simplifying (acos a)
* * [misc]simplify:  iters left: 1 (2 enodes)
* [exit]simplify:  Simplified to (acos a)
* [misc]simplify:  Simplified (2 2) to (λ (a) (/ (/ a -1) (acos a)))
* * * * [misc]progress:  [ 17 / 25 ] simplifiying candidate #<alt (λ (a) (/ (/ a (- (* (cbrt (acos a)) (cbrt (acos a))))) (cbrt (acos a))))>
* [enter]simplify:  Simplifying (cbrt (acos a))
* * [misc]simplify:  iters left: 2 (3 enodes)
* [exit]simplify:  Simplified to (cbrt (acos a))
* [misc]simplify:  Simplified (2 2) to (λ (a) (/ (/ a (- (* (cbrt (acos a)) (cbrt (acos a))))) (cbrt (acos a))))
* * * * [misc]progress:  [ 18 / 25 ] simplifiying candidate #<alt (λ (a) (/ (/ a (- (sqrt (acos a)))) (sqrt (acos a))))>
* [enter]simplify:  Simplifying (sqrt (acos a))
* * [misc]simplify:  iters left: 2 (3 enodes)
* [exit]simplify:  Simplified to (sqrt (acos a))
* [misc]simplify:  Simplified (2 2) to (λ (a) (/ (/ a (- (sqrt (acos a)))) (sqrt (acos a))))
* * * * [misc]progress:  [ 19 / 25 ] simplifiying candidate #<alt (λ (a) (/ (/ a (- 1)) (acos a)))>
* [enter]simplify:  Simplifying (acos a)
* * [misc]simplify:  iters left: 1 (2 enodes)
* [exit]simplify:  Simplified to (acos a)
* [misc]simplify:  Simplified (2 2) to (λ (a) (/ (/ a (- 1)) (acos a)))
* * * * [misc]progress:  [ 20 / 25 ] simplifiying candidate #<alt (λ (a) (/ (/ a (* (cbrt (acos a)) (cbrt (acos a)))) (- (cbrt (acos a)))))>
* [enter]simplify:  Simplifying (- (cbrt (acos a)))
* * [misc]simplify:  iters left: 4 (4 enodes)
* [exit]simplify:  Simplified to (- (cbrt (acos a)))
* [misc]simplify:  Simplified (2 2) to (λ (a) (/ (/ a (* (cbrt (acos a)) (cbrt (acos a)))) (- (cbrt (acos a)))))
* * * * [misc]progress:  [ 21 / 25 ] simplifiying candidate #<alt (λ (a) (/ (/ a (sqrt (acos a))) (- (sqrt (acos a)))))>
* [enter]simplify:  Simplifying (- (sqrt (acos a)))
* * [misc]simplify:  iters left: 4 (4 enodes)
* [exit]simplify:  Simplified to (- (sqrt (acos a)))
* [misc]simplify:  Simplified (2 2) to (λ (a) (/ (/ a (sqrt (acos a))) (- (sqrt (acos a)))))
* * * * [misc]progress:  [ 22 / 25 ] simplifiying candidate #<alt (λ (a) (/ (/ a 1) (- (acos a))))>
* [enter]simplify:  Simplifying (- (acos a))
* * [misc]simplify:  iters left: 3 (3 enodes)
* [exit]simplify:  Simplified to (- (acos a))
* [misc]simplify:  Simplified (2 2) to (λ (a) (/ (/ a 1) (- (acos a))))
* * * * [misc]progress:  [ 23 / 25 ] simplifiying candidate #<alt (λ (a) (* -1 (/ a (acos a))))>
* [enter]simplify:  Simplifying (* -1 (/ a (acos a)))
* * [misc]simplify:  iters left: 5 (5 enodes)
* * [misc]simplify:  iters left: 4 (9 enodes)
* * [misc]simplify:  iters left: 3 (14 enodes)
* * [misc]simplify:  iters left: 2 (16 enodes)
* * [misc]simplify:  iters left: 1 (18 enodes)
* [exit]simplify:  Simplified to (/ (- a) (acos a))
* [misc]simplify:  Simplified (2) to (λ (a) (/ (- a) (acos a)))
* * * * [misc]progress:  [ 24 / 25 ] simplifiying candidate #<alt (λ (a) (* -1 (/ a (acos a))))>
* [enter]simplify:  Simplifying (* -1 (/ a (acos a)))
* * [misc]simplify:  iters left: 5 (5 enodes)
* * [misc]simplify:  iters left: 4 (9 enodes)
* * [misc]simplify:  iters left: 3 (14 enodes)
* * [misc]simplify:  iters left: 2 (16 enodes)
* * [misc]simplify:  iters left: 1 (18 enodes)
* [exit]simplify:  Simplified to (/ (- a) (acos a))
* [misc]simplify:  Simplified (2) to (λ (a) (/ (- a) (acos a)))
* * * * [misc]progress:  [ 25 / 25 ] simplifiying candidate #<alt (λ (a) (* -1 (/ a (acos a))))>
* [enter]simplify:  Simplifying (* -1 (/ a (acos a)))
* * [misc]simplify:  iters left: 5 (5 enodes)
* * [misc]simplify:  iters left: 4 (9 enodes)
* * [misc]simplify:  iters left: 3 (14 enodes)
* * [misc]simplify:  iters left: 2 (16 enodes)
* * [misc]simplify:  iters left: 1 (18 enodes)
* [exit]simplify:  Simplified to (/ (- a) (acos a))
* [misc]simplify:  Simplified (2) to (λ (a) (/ (- a) (acos a)))
* * * [misc]progress:  adding candidates to table
* * [misc]progress:  iteration 2 / 4
* * * [misc]progress:  picking best candidate
* * * * [misc]pick:  Picked  #<alt (λ (a) (/ 1 (/ (- (acos a)) a)))>
* * * [misc]progress:  localizing error
* * * [misc]progress:  generating rewritten candidates
* * * * [misc]progress:  [ 1 / 2 ] rewriting at (2 2)
* * * * [misc]progress:  [ 2 / 2 ] rewriting at (2)
* * * [misc]progress:  generating series expansions
* * * * [misc]progress:  [ 1 / 2 ] generating series at (2 2)
* [misc]approximate:  Taking taylor expansion of (/ (- (acos a)) a) in (a) around 0
* [misc]taylor:  Taking taylor expansion of (/ (- (acos a)) a) in a
* [misc]taylor:  Taking taylor expansion of (- (acos a)) in a
* [misc]taylor:  Taking taylor expansion of (acos a) in a
* [misc]backup-simplify:  Simplify (acos a) into (acos a)
* [misc]taylor:  Taking taylor expansion of a in a
* [misc]backup-simplify:  Simplify 0 into 0
* [misc]backup-simplify:  Simplify 1 into 1
* [misc]backup-simplify:  Simplify (- (acos a)) into (- (acos a))
* [misc]backup-simplify:  Simplify (- (acos a)) into (- (acos a))
* [misc]backup-simplify:  Simplify (/ (- (acos a)) 1) into (* -1 (acos a))
* [misc]taylor:  Taking taylor expansion of (/ (- (acos a)) a) in a
* [misc]taylor:  Taking taylor expansion of (- (acos a)) in a
* [misc]taylor:  Taking taylor expansion of (acos a) in a
* [misc]backup-simplify:  Simplify (acos a) into (acos a)
* [misc]taylor:  Taking taylor expansion of a in a
* [misc]backup-simplify:  Simplify 0 into 0
* [misc]backup-simplify:  Simplify 1 into 1
* [misc]backup-simplify:  Simplify (- (acos a)) into (- (acos a))
* [misc]backup-simplify:  Simplify (- (acos a)) into (- (acos a))
* [misc]backup-simplify:  Simplify (/ (- (acos a)) 1) into (* -1 (acos a))
* [misc]backup-simplify:  Simplify (* -1 (acos a)) into (* -1 (acos a))
* [misc]backup-simplify:  Simplify (- 0) into 0
* [misc]backup-simplify:  Simplify (- (/ 0 1) (+ (* (* -1 (acos a)) (/ 0 1)))) into 0
* [misc]backup-simplify:  Simplify 0 into 0
* [misc]backup-simplify:  Simplify (- 0) into 0
* [misc]backup-simplify:  Simplify (- (/ 0 1) (+ (* (* -1 (acos a)) (/ 0 1)) (* 0 (/ 0 1)))) into 0
* [misc]backup-simplify:  Simplify 0 into 0
* [misc]backup-simplify:  Simplify (- 0) into 0
* [misc]backup-simplify:  Simplify (- (/ 0 1) (+ (* (* -1 (acos a)) (/ 0 1)) (* 0 (/ 0 1)) (* 0 (/ 0 1)))) into 0
* [misc]backup-simplify:  Simplify 0 into 0
* [misc]backup-simplify:  Simplify (- 0) into 0
* [misc]backup-simplify:  Simplify (- (/ 0 1) (+ (* (* -1 (acos a)) (/ 0 1)) (* 0 (/ 0 1)) (* 0 (/ 0 1)) (* 0 (/ 0 1)))) into 0
* [misc]backup-simplify:  Simplify 0 into 0
* [misc]backup-simplify:  Simplify (- 0) into 0
* [misc]backup-simplify:  Simplify (- (/ 0 1) (+ (* (* -1 (acos a)) (/ 0 1)) (* 0 (/ 0 1)) (* 0 (/ 0 1)) (* 0 (/ 0 1)) (* 0 (/ 0 1)))) into 0
* [misc]backup-simplify:  Simplify 0 into 0
* [misc]backup-simplify:  Simplify (- 0) into 0
* [misc]backup-simplify:  Simplify (- (/ 0 1) (+ (* (* -1 (acos a)) (/ 0 1)) (* 0 (/ 0 1)) (* 0 (/ 0 1)) (* 0 (/ 0 1)) (* 0 (/ 0 1)) (* 0 (/ 0 1)))) into 0
* [misc]backup-simplify:  Simplify 0 into 0
* [misc]backup-simplify:  Simplify (* (* -1 (acos a)) (/ 1 a)) into (* -1 (/ (acos a) a))
* [misc]approximate:  Taking taylor expansion of (/ (- (acos (/ 1 a))) (/ 1 a)) in (a) around 0
* [misc]taylor:  Taking taylor expansion of (/ (- (acos (/ 1 a))) (/ 1 a)) in a
* [misc]taylor:  Taking taylor expansion of (- (acos (/ 1 a))) in a
* [misc]taylor:  Taking taylor expansion of (acos (/ 1 a)) in a
* [misc]backup-simplify:  Simplify (acos (/ 1 a)) into (acos (/ 1 a))
* [misc]taylor:  Taking taylor expansion of (/ 1 a) in a
* [misc]taylor:  Taking taylor expansion of a in a
* [misc]backup-simplify:  Simplify 0 into 0
* [misc]backup-simplify:  Simplify 1 into 1
* [misc]backup-simplify:  Simplify (/ 1 1) into 1
* [misc]backup-simplify:  Simplify (- (acos (/ 1 a))) into (- (acos (/ 1 a)))
* [misc]backup-simplify:  Simplify (- (acos (/ 1 a))) into (- (acos (/ 1 a)))
* [misc]backup-simplify:  Simplify (/ (- (acos (/ 1 a))) 1) into (* -1 (acos (/ 1 a)))
* [misc]taylor:  Taking taylor expansion of (/ (- (acos (/ 1 a))) (/ 1 a)) in a
* [misc]taylor:  Taking taylor expansion of (- (acos (/ 1 a))) in a
* [misc]taylor:  Taking taylor expansion of (acos (/ 1 a)) in a
* [misc]backup-simplify:  Simplify (acos (/ 1 a)) into (acos (/ 1 a))
* [misc]taylor:  Taking taylor expansion of (/ 1 a) in a
* [misc]taylor:  Taking taylor expansion of a in a
* [misc]backup-simplify:  Simplify 0 into 0
* [misc]backup-simplify:  Simplify 1 into 1
* [misc]backup-simplify:  Simplify (/ 1 1) into 1
* [misc]backup-simplify:  Simplify (- (acos (/ 1 a))) into (- (acos (/ 1 a)))
* [misc]backup-simplify:  Simplify (- (acos (/ 1 a))) into (- (acos (/ 1 a)))
* [misc]backup-simplify:  Simplify (/ (- (acos (/ 1 a))) 1) into (* -1 (acos (/ 1 a)))
* [misc]backup-simplify:  Simplify (* -1 (acos (/ 1 a))) into (* -1 (acos (/ 1 a)))
* [misc]backup-simplify:  Simplify (- 0) into 0
* [misc]backup-simplify:  Simplify (- (+ (* 1 (/ 0 1)))) into 0
* [misc]backup-simplify:  Simplify (- (/ 0 1) (+ (* (* -1 (acos (/ 1 a))) (/ 0 1)))) into 0
* [misc]backup-simplify:  Simplify 0 into 0
* [misc]backup-simplify:  Simplify (- 0) into 0
* [misc]backup-simplify:  Simplify (- (+ (* 1 (/ 0 1)) (* 0 (/ 0 1)))) into 0
* [misc]backup-simplify:  Simplify (- (/ 0 1) (+ (* (* -1 (acos (/ 1 a))) (/ 0 1)) (* 0 (/ 0 1)))) into 0
* [misc]backup-simplify:  Simplify 0 into 0
* [misc]backup-simplify:  Simplify (- 0) into 0
* [misc]backup-simplify:  Simplify (- (+ (* 1 (/ 0 1)) (* 0 (/ 0 1)) (* 0 (/ 0 1)))) into 0
* [misc]backup-simplify:  Simplify (- (/ 0 1) (+ (* (* -1 (acos (/ 1 a))) (/ 0 1)) (* 0 (/ 0 1)) (* 0 (/ 0 1)))) into 0
* [misc]backup-simplify:  Simplify 0 into 0
* [misc]backup-simplify:  Simplify (- 0) into 0
* [misc]backup-simplify:  Simplify (- (+ (* 1 (/ 0 1)) (* 0 (/ 0 1)) (* 0 (/ 0 1)) (* 0 (/ 0 1)))) into 0
* [misc]backup-simplify:  Simplify (- (/ 0 1) (+ (* (* -1 (acos (/ 1 a))) (/ 0 1)) (* 0 (/ 0 1)) (* 0 (/ 0 1)) (* 0 (/ 0 1)))) into 0
* [misc]backup-simplify:  Simplify 0 into 0
* [misc]backup-simplify:  Simplify (- 0) into 0
* [misc]backup-simplify:  Simplify (- (+ (* 1 (/ 0 1)) (* 0 (/ 0 1)) (* 0 (/ 0 1)) (* 0 (/ 0 1)) (* 0 (/ 0 1)))) into 0
* [misc]backup-simplify:  Simplify (- (/ 0 1) (+ (* (* -1 (acos (/ 1 a))) (/ 0 1)) (* 0 (/ 0 1)) (* 0 (/ 0 1)) (* 0 (/ 0 1)) (* 0 (/ 0 1)))) into 0
* [misc]backup-simplify:  Simplify 0 into 0
* [misc]backup-simplify:  Simplify (- 0) into 0
* [misc]backup-simplify:  Simplify (- (+ (* 1 (/ 0 1)) (* 0 (/ 0 1)) (* 0 (/ 0 1)) (* 0 (/ 0 1)) (* 0 (/ 0 1)) (* 0 (/ 0 1)))) into 0
* [misc]backup-simplify:  Simplify (- (/ 0 1) (+ (* (* -1 (acos (/ 1 a))) (/ 0 1)) (* 0 (/ 0 1)) (* 0 (/ 0 1)) (* 0 (/ 0 1)) (* 0 (/ 0 1)) (* 0 (/ 0 1)))) into 0
* [misc]backup-simplify:  Simplify 0 into 0
* [misc]backup-simplify:  Simplify (* (* -1 (acos (/ 1 (/ 1 a)))) (/ 1 a)) into (* -1 (/ (acos a) a))
* [misc]approximate:  Taking taylor expansion of (/ (- (acos (/ 1 (- a)))) (/ 1 (- a))) in (a) around 0
* [misc]taylor:  Taking taylor expansion of (/ (- (acos (/ 1 (- a)))) (/ 1 (- a))) in a
* [misc]taylor:  Taking taylor expansion of (- (acos (/ 1 (- a)))) in a
* [misc]taylor:  Taking taylor expansion of (acos (/ 1 (- a))) in a
* [misc]backup-simplify:  Simplify (acos (/ 1 (- a))) into (acos (/ -1 a))
* [misc]taylor:  Taking taylor expansion of (/ 1 (- a)) in a
* [misc]taylor:  Taking taylor expansion of (- a) in a
* [misc]taylor:  Taking taylor expansion of a in a
* [misc]backup-simplify:  Simplify 0 into 0
* [misc]backup-simplify:  Simplify 1 into 1
* [misc]backup-simplify:  Simplify (- 0) into 0
* [misc]backup-simplify:  Simplify (- 1) into -1
* [misc]backup-simplify:  Simplify (- 1) into -1
* [misc]backup-simplify:  Simplify (/ 1 -1) into -1
* [misc]backup-simplify:  Simplify (- (acos (/ -1 a))) into (- (acos (/ -1 a)))
* [misc]backup-simplify:  Simplify (- (acos (/ -1 a))) into (- (acos (/ -1 a)))
* [misc]backup-simplify:  Simplify (/ (- (acos (/ -1 a))) -1) into (acos (/ -1 a))
* [misc]taylor:  Taking taylor expansion of (/ (- (acos (/ 1 (- a)))) (/ 1 (- a))) in a
* [misc]taylor:  Taking taylor expansion of (- (acos (/ 1 (- a)))) in a
* [misc]taylor:  Taking taylor expansion of (acos (/ 1 (- a))) in a
* [misc]backup-simplify:  Simplify (acos (/ 1 (- a))) into (acos (/ -1 a))
* [misc]taylor:  Taking taylor expansion of (/ 1 (- a)) in a
* [misc]taylor:  Taking taylor expansion of (- a) in a
* [misc]taylor:  Taking taylor expansion of a in a
* [misc]backup-simplify:  Simplify 0 into 0
* [misc]backup-simplify:  Simplify 1 into 1
* [misc]backup-simplify:  Simplify (- 0) into 0
* [misc]backup-simplify:  Simplify (- 1) into -1
* [misc]backup-simplify:  Simplify (- 1) into -1
* [misc]backup-simplify:  Simplify (/ 1 -1) into -1
* [misc]backup-simplify:  Simplify (- (acos (/ -1 a))) into (- (acos (/ -1 a)))
* [misc]backup-simplify:  Simplify (- (acos (/ -1 a))) into (- (acos (/ -1 a)))
* [misc]backup-simplify:  Simplify (/ (- (acos (/ -1 a))) -1) into (acos (/ -1 a))
* [misc]backup-simplify:  Simplify (acos (/ -1 a)) into (acos (/ -1 a))
* [misc]backup-simplify:  Simplify (- 0) into 0
* [misc]backup-simplify:  Simplify (- 0) into 0
* [misc]backup-simplify:  Simplify (- 1) into -1
* [misc]backup-simplify:  Simplify (- (+ (* -1 (/ 0 -1)))) into 0
* [misc]backup-simplify:  Simplify (- (/ 0 -1) (+ (* (acos (/ -1 a)) (/ 0 -1)))) 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 (- 1) into -1
* [misc]backup-simplify:  Simplify (- 0) into 0
* [misc]backup-simplify:  Simplify (- 1) into -1
* [misc]backup-simplify:  Simplify (- (+ (* -1 (/ 0 -1)) (* 0 (/ 0 -1)))) into 0
* [misc]backup-simplify:  Simplify (- (/ 0 -1) (+ (* (acos (/ -1 a)) (/ 0 -1)) (* 0 (/ 0 -1)))) 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 (- 1) into -1
* [misc]backup-simplify:  Simplify (- 0) into 0
* [misc]backup-simplify:  Simplify (- 1) into -1
* [misc]backup-simplify:  Simplify (- 0) into 0
* [misc]backup-simplify:  Simplify (- 1) into -1
* [misc]backup-simplify:  Simplify (- (+ (* -1 (/ 0 -1)) (* 0 (/ 0 -1)) (* 0 (/ 0 -1)))) into 0
* [misc]backup-simplify:  Simplify (- (/ 0 -1) (+ (* (acos (/ -1 a)) (/ 0 -1)) (* 0 (/ 0 -1)) (* 0 (/ 0 -1)))) 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 (- 1) into -1
* [misc]backup-simplify:  Simplify (- 0) into 0
* [misc]backup-simplify:  Simplify (- 1) into -1
* [misc]backup-simplify:  Simplify (- 0) into 0
* [misc]backup-simplify:  Simplify (- 1) into -1
* [misc]backup-simplify:  Simplify (- 0) into 0
* [misc]backup-simplify:  Simplify (- 1) into -1
* [misc]backup-simplify:  Simplify (- (+ (* -1 (/ 0 -1)) (* 0 (/ 0 -1)) (* 0 (/ 0 -1)) (* 0 (/ 0 -1)))) into 0
* [misc]backup-simplify:  Simplify (- (/ 0 -1) (+ (* (acos (/ -1 a)) (/ 0 -1)) (* 0 (/ 0 -1)) (* 0 (/ 0 -1)) (* 0 (/ 0 -1)))) 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 (- 1) into -1
* [misc]backup-simplify:  Simplify (- 0) into 0
* [misc]backup-simplify:  Simplify (- 1) into -1
* [misc]backup-simplify:  Simplify (- 0) into 0
* [misc]backup-simplify:  Simplify (- 1) into -1
* [misc]backup-simplify:  Simplify (- 0) into 0
* [misc]backup-simplify:  Simplify (- 1) into -1
* [misc]backup-simplify:  Simplify (- 0) into 0
* [misc]backup-simplify:  Simplify (- 1) into -1
* [misc]backup-simplify:  Simplify (- (+ (* -1 (/ 0 -1)) (* 0 (/ 0 -1)) (* 0 (/ 0 -1)) (* 0 (/ 0 -1)) (* 0 (/ 0 -1)))) into 0
* [misc]backup-simplify:  Simplify (- (/ 0 -1) (+ (* (acos (/ -1 a)) (/ 0 -1)) (* 0 (/ 0 -1)) (* 0 (/ 0 -1)) (* 0 (/ 0 -1)) (* 0 (/ 0 -1)))) 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 (- 1) into -1
* [misc]backup-simplify:  Simplify (- 0) into 0
* [misc]backup-simplify:  Simplify (- 1) into -1
* [misc]backup-simplify:  Simplify (- 0) into 0
* [misc]backup-simplify:  Simplify (- 1) into -1
* [misc]backup-simplify:  Simplify (- 0) into 0
* [misc]backup-simplify:  Simplify (- 1) into -1
* [misc]backup-simplify:  Simplify (- 0) into 0
* [misc]backup-simplify:  Simplify (- 1) into -1
* [misc]backup-simplify:  Simplify (- 0) into 0
* [misc]backup-simplify:  Simplify (- 1) into -1
* [misc]backup-simplify:  Simplify (- (+ (* -1 (/ 0 -1)) (* 0 (/ 0 -1)) (* 0 (/ 0 -1)) (* 0 (/ 0 -1)) (* 0 (/ 0 -1)) (* 0 (/ 0 -1)))) into 0
* [misc]backup-simplify:  Simplify (- (/ 0 -1) (+ (* (acos (/ -1 a)) (/ 0 -1)) (* 0 (/ 0 -1)) (* 0 (/ 0 -1)) (* 0 (/ 0 -1)) (* 0 (/ 0 -1)) (* 0 (/ 0 -1)))) into 0
* [misc]backup-simplify:  Simplify 0 into 0
* [misc]backup-simplify:  Simplify (* (acos (/ -1 (/ 1 (- a)))) (/ 1 (- a))) into (* -1 (/ (acos a) a))
* * * * [misc]progress:  [ 2 / 2 ] generating series at (2)
* [misc]approximate:  Taking taylor expansion of (/ 1 (/ (- (acos a)) a)) in (a) around 0
* [misc]taylor:  Taking taylor expansion of (/ 1 (/ (- (acos a)) a)) in a
* [misc]taylor:  Taking taylor expansion of (/ (- (acos a)) a) in a
* [misc]taylor:  Taking taylor expansion of (- (acos a)) in a
* [misc]taylor:  Taking taylor expansion of (acos a) in a
* [misc]backup-simplify:  Simplify (acos a) into (acos a)
* [misc]taylor:  Taking taylor expansion of a in a
* [misc]backup-simplify:  Simplify 0 into 0
* [misc]backup-simplify:  Simplify 1 into 1
* [misc]backup-simplify:  Simplify (- (acos a)) into (- (acos a))
* [misc]backup-simplify:  Simplify (- (acos a)) into (- (acos a))
* [misc]backup-simplify:  Simplify (/ (- (acos a)) 1) into (* -1 (acos a))
* [misc]backup-simplify:  Simplify (/ 1 (* -1 (acos a))) into (/ -1 (acos a))
* [misc]taylor:  Taking taylor expansion of (/ 1 (/ (- (acos a)) a)) in a
* [misc]taylor:  Taking taylor expansion of (/ (- (acos a)) a) in a
* [misc]taylor:  Taking taylor expansion of (- (acos a)) in a
* [misc]taylor:  Taking taylor expansion of (acos a) in a
* [misc]backup-simplify:  Simplify (acos a) into (acos a)
* [misc]taylor:  Taking taylor expansion of a in a
* [misc]backup-simplify:  Simplify 0 into 0
* [misc]backup-simplify:  Simplify 1 into 1
* [misc]backup-simplify:  Simplify (- (acos a)) into (- (acos a))
* [misc]backup-simplify:  Simplify (- (acos a)) into (- (acos a))
* [misc]backup-simplify:  Simplify (/ (- (acos a)) 1) into (* -1 (acos a))
* [misc]backup-simplify:  Simplify (/ 1 (* -1 (acos a))) into (/ -1 (acos a))
* [misc]backup-simplify:  Simplify (/ -1 (acos a)) into (/ -1 (acos a))
* [misc]backup-simplify:  Simplify (- 0) into 0
* [misc]backup-simplify:  Simplify (- (/ 0 1) (+ (* (* -1 (acos a)) (/ 0 1)))) into 0
* [misc]backup-simplify:  Simplify (- (+ (* (/ -1 (acos a)) (/ 0 (* -1 (acos a)))))) into 0
* [misc]backup-simplify:  Simplify 0 into 0
* [misc]backup-simplify:  Simplify (- 0) into 0
* [misc]backup-simplify:  Simplify (- (/ 0 1) (+ (* (* -1 (acos a)) (/ 0 1)) (* 0 (/ 0 1)))) into 0
* [misc]backup-simplify:  Simplify (- (+ (* (/ -1 (acos a)) (/ 0 (* -1 (acos a)))) (* 0 (/ 0 (* -1 (acos a)))))) into 0
* [misc]backup-simplify:  Simplify 0 into 0
* [misc]backup-simplify:  Simplify (- 0) into 0
* [misc]backup-simplify:  Simplify (- (/ 0 1) (+ (* (* -1 (acos a)) (/ 0 1)) (* 0 (/ 0 1)) (* 0 (/ 0 1)))) into 0
* [misc]backup-simplify:  Simplify (- (+ (* (/ -1 (acos a)) (/ 0 (* -1 (acos a)))) (* 0 (/ 0 (* -1 (acos a)))) (* 0 (/ 0 (* -1 (acos a)))))) into 0
* [misc]backup-simplify:  Simplify 0 into 0
* [misc]backup-simplify:  Simplify (- 0) into 0
* [misc]backup-simplify:  Simplify (- (/ 0 1) (+ (* (* -1 (acos a)) (/ 0 1)) (* 0 (/ 0 1)) (* 0 (/ 0 1)) (* 0 (/ 0 1)))) into 0
* [misc]backup-simplify:  Simplify (- (+ (* (/ -1 (acos a)) (/ 0 (* -1 (acos a)))) (* 0 (/ 0 (* -1 (acos a)))) (* 0 (/ 0 (* -1 (acos a)))) (* 0 (/ 0 (* -1 (acos a)))))) into 0
* [misc]backup-simplify:  Simplify 0 into 0
* [misc]backup-simplify:  Simplify (- 0) into 0
* [misc]backup-simplify:  Simplify (- (/ 0 1) (+ (* (* -1 (acos a)) (/ 0 1)) (* 0 (/ 0 1)) (* 0 (/ 0 1)) (* 0 (/ 0 1)) (* 0 (/ 0 1)))) into 0
* [misc]backup-simplify:  Simplify (- (+ (* (/ -1 (acos a)) (/ 0 (* -1 (acos a)))) (* 0 (/ 0 (* -1 (acos a)))) (* 0 (/ 0 (* -1 (acos a)))) (* 0 (/ 0 (* -1 (acos a)))) (* 0 (/ 0 (* -1 (acos a)))))) into 0
* [misc]backup-simplify:  Simplify 0 into 0
* [misc]backup-simplify:  Simplify (- 0) into 0
* [misc]backup-simplify:  Simplify (- (/ 0 1) (+ (* (* -1 (acos a)) (/ 0 1)) (* 0 (/ 0 1)) (* 0 (/ 0 1)) (* 0 (/ 0 1)) (* 0 (/ 0 1)) (* 0 (/ 0 1)))) into 0
* [misc]backup-simplify:  Simplify (- (+ (* (/ -1 (acos a)) (/ 0 (* -1 (acos a)))) (* 0 (/ 0 (* -1 (acos a)))) (* 0 (/ 0 (* -1 (acos a)))) (* 0 (/ 0 (* -1 (acos a)))) (* 0 (/ 0 (* -1 (acos a)))) (* 0 (/ 0 (* -1 (acos a)))))) into 0
* [misc]backup-simplify:  Simplify 0 into 0
* [misc]backup-simplify:  Simplify (* (/ -1 (acos a)) a) into (* -1 (/ a (acos a)))
* [misc]approximate:  Taking taylor expansion of (/ 1 (/ (- (acos (/ 1 a))) (/ 1 a))) in (a) around 0
* [misc]taylor:  Taking taylor expansion of (/ 1 (/ (- (acos (/ 1 a))) (/ 1 a))) in a
* [misc]taylor:  Taking taylor expansion of (/ (- (acos (/ 1 a))) (/ 1 a)) in a
* [misc]taylor:  Taking taylor expansion of (- (acos (/ 1 a))) in a
* [misc]taylor:  Taking taylor expansion of (acos (/ 1 a)) in a
* [misc]backup-simplify:  Simplify (acos (/ 1 a)) into (acos (/ 1 a))
* [misc]taylor:  Taking taylor expansion of (/ 1 a) in a
* [misc]taylor:  Taking taylor expansion of a in a
* [misc]backup-simplify:  Simplify 0 into 0
* [misc]backup-simplify:  Simplify 1 into 1
* [misc]backup-simplify:  Simplify (/ 1 1) into 1
* [misc]backup-simplify:  Simplify (- (acos (/ 1 a))) into (- (acos (/ 1 a)))
* [misc]backup-simplify:  Simplify (- (acos (/ 1 a))) into (- (acos (/ 1 a)))
* [misc]backup-simplify:  Simplify (/ (- (acos (/ 1 a))) 1) into (* -1 (acos (/ 1 a)))
* [misc]backup-simplify:  Simplify (/ 1 (* -1 (acos (/ 1 a)))) into (/ -1 (acos (/ 1 a)))
* [misc]taylor:  Taking taylor expansion of (/ 1 (/ (- (acos (/ 1 a))) (/ 1 a))) in a
* [misc]taylor:  Taking taylor expansion of (/ (- (acos (/ 1 a))) (/ 1 a)) in a
* [misc]taylor:  Taking taylor expansion of (- (acos (/ 1 a))) in a
* [misc]taylor:  Taking taylor expansion of (acos (/ 1 a)) in a
* [misc]backup-simplify:  Simplify (acos (/ 1 a)) into (acos (/ 1 a))
* [misc]taylor:  Taking taylor expansion of (/ 1 a) in a
* [misc]taylor:  Taking taylor expansion of a in a
* [misc]backup-simplify:  Simplify 0 into 0
* [misc]backup-simplify:  Simplify 1 into 1
* [misc]backup-simplify:  Simplify (/ 1 1) into 1
* [misc]backup-simplify:  Simplify (- (acos (/ 1 a))) into (- (acos (/ 1 a)))
* [misc]backup-simplify:  Simplify (- (acos (/ 1 a))) into (- (acos (/ 1 a)))
* [misc]backup-simplify:  Simplify (/ (- (acos (/ 1 a))) 1) into (* -1 (acos (/ 1 a)))
* [misc]backup-simplify:  Simplify (/ 1 (* -1 (acos (/ 1 a)))) into (/ -1 (acos (/ 1 a)))
* [misc]backup-simplify:  Simplify (/ -1 (acos (/ 1 a))) into (/ -1 (acos (/ 1 a)))
* [misc]backup-simplify:  Simplify (- 0) into 0
* [misc]backup-simplify:  Simplify (- (+ (* 1 (/ 0 1)))) into 0
* [misc]backup-simplify:  Simplify (- (/ 0 1) (+ (* (* -1 (acos (/ 1 a))) (/ 0 1)))) into 0
* [misc]backup-simplify:  Simplify (- (+ (* (/ -1 (acos (/ 1 a))) (/ 0 (* -1 (acos (/ 1 a))))))) into 0
* [misc]backup-simplify:  Simplify 0 into 0
* [misc]backup-simplify:  Simplify (- 0) into 0
* [misc]backup-simplify:  Simplify (- (+ (* 1 (/ 0 1)) (* 0 (/ 0 1)))) into 0
* [misc]backup-simplify:  Simplify (- (/ 0 1) (+ (* (* -1 (acos (/ 1 a))) (/ 0 1)) (* 0 (/ 0 1)))) into 0
* [misc]backup-simplify:  Simplify (- (+ (* (/ -1 (acos (/ 1 a))) (/ 0 (* -1 (acos (/ 1 a))))) (* 0 (/ 0 (* -1 (acos (/ 1 a))))))) into 0
* [misc]backup-simplify:  Simplify 0 into 0
* [misc]backup-simplify:  Simplify (- 0) into 0
* [misc]backup-simplify:  Simplify (- (+ (* 1 (/ 0 1)) (* 0 (/ 0 1)) (* 0 (/ 0 1)))) into 0
* [misc]backup-simplify:  Simplify (- (/ 0 1) (+ (* (* -1 (acos (/ 1 a))) (/ 0 1)) (* 0 (/ 0 1)) (* 0 (/ 0 1)))) into 0
* [misc]backup-simplify:  Simplify (- (+ (* (/ -1 (acos (/ 1 a))) (/ 0 (* -1 (acos (/ 1 a))))) (* 0 (/ 0 (* -1 (acos (/ 1 a))))) (* 0 (/ 0 (* -1 (acos (/ 1 a))))))) into 0
* [misc]backup-simplify:  Simplify 0 into 0
* [misc]backup-simplify:  Simplify (- 0) into 0
* [misc]backup-simplify:  Simplify (- (+ (* 1 (/ 0 1)) (* 0 (/ 0 1)) (* 0 (/ 0 1)) (* 0 (/ 0 1)))) into 0
* [misc]backup-simplify:  Simplify (- (/ 0 1) (+ (* (* -1 (acos (/ 1 a))) (/ 0 1)) (* 0 (/ 0 1)) (* 0 (/ 0 1)) (* 0 (/ 0 1)))) into 0
* [misc]backup-simplify:  Simplify (- (+ (* (/ -1 (acos (/ 1 a))) (/ 0 (* -1 (acos (/ 1 a))))) (* 0 (/ 0 (* -1 (acos (/ 1 a))))) (* 0 (/ 0 (* -1 (acos (/ 1 a))))) (* 0 (/ 0 (* -1 (acos (/ 1 a))))))) into 0
* [misc]backup-simplify:  Simplify 0 into 0
* [misc]backup-simplify:  Simplify (- 0) into 0
* [misc]backup-simplify:  Simplify (- (+ (* 1 (/ 0 1)) (* 0 (/ 0 1)) (* 0 (/ 0 1)) (* 0 (/ 0 1)) (* 0 (/ 0 1)))) into 0
* [misc]backup-simplify:  Simplify (- (/ 0 1) (+ (* (* -1 (acos (/ 1 a))) (/ 0 1)) (* 0 (/ 0 1)) (* 0 (/ 0 1)) (* 0 (/ 0 1)) (* 0 (/ 0 1)))) into 0
* [misc]backup-simplify:  Simplify (- (+ (* (/ -1 (acos (/ 1 a))) (/ 0 (* -1 (acos (/ 1 a))))) (* 0 (/ 0 (* -1 (acos (/ 1 a))))) (* 0 (/ 0 (* -1 (acos (/ 1 a))))) (* 0 (/ 0 (* -1 (acos (/ 1 a))))) (* 0 (/ 0 (* -1 (acos (/ 1 a))))))) into 0
* [misc]backup-simplify:  Simplify 0 into 0
* [misc]backup-simplify:  Simplify (- 0) into 0
* [misc]backup-simplify:  Simplify (- (+ (* 1 (/ 0 1)) (* 0 (/ 0 1)) (* 0 (/ 0 1)) (* 0 (/ 0 1)) (* 0 (/ 0 1)) (* 0 (/ 0 1)))) into 0
* [misc]backup-simplify:  Simplify (- (/ 0 1) (+ (* (* -1 (acos (/ 1 a))) (/ 0 1)) (* 0 (/ 0 1)) (* 0 (/ 0 1)) (* 0 (/ 0 1)) (* 0 (/ 0 1)) (* 0 (/ 0 1)))) into 0
* [misc]backup-simplify:  Simplify (- (+ (* (/ -1 (acos (/ 1 a))) (/ 0 (* -1 (acos (/ 1 a))))) (* 0 (/ 0 (* -1 (acos (/ 1 a))))) (* 0 (/ 0 (* -1 (acos (/ 1 a))))) (* 0 (/ 0 (* -1 (acos (/ 1 a))))) (* 0 (/ 0 (* -1 (acos (/ 1 a))))) (* 0 (/ 0 (* -1 (acos (/ 1 a))))))) into 0
* [misc]backup-simplify:  Simplify 0 into 0
* [misc]backup-simplify:  Simplify (* (/ -1 (acos (/ 1 (/ 1 a)))) (/ 1 (/ 1 a))) into (* -1 (/ a (acos a)))
* [misc]approximate:  Taking taylor expansion of (/ 1 (/ (- (acos (/ 1 (- a)))) (/ 1 (- a)))) in (a) around 0
* [misc]taylor:  Taking taylor expansion of (/ 1 (/ (- (acos (/ 1 (- a)))) (/ 1 (- a)))) in a
* [misc]taylor:  Taking taylor expansion of (/ (- (acos (/ 1 (- a)))) (/ 1 (- a))) in a
* [misc]taylor:  Taking taylor expansion of (- (acos (/ 1 (- a)))) in a
* [misc]taylor:  Taking taylor expansion of (acos (/ 1 (- a))) in a
* [misc]backup-simplify:  Simplify (acos (/ 1 (- a))) into (acos (/ -1 a))
* [misc]taylor:  Taking taylor expansion of (/ 1 (- a)) in a
* [misc]taylor:  Taking taylor expansion of (- a) in a
* [misc]taylor:  Taking taylor expansion of a in a
* [misc]backup-simplify:  Simplify 0 into 0
* [misc]backup-simplify:  Simplify 1 into 1
* [misc]backup-simplify:  Simplify (- 0) into 0
* [misc]backup-simplify:  Simplify (- 1) into -1
* [misc]backup-simplify:  Simplify (- 1) into -1
* [misc]backup-simplify:  Simplify (/ 1 -1) into -1
* [misc]backup-simplify:  Simplify (- (acos (/ -1 a))) into (- (acos (/ -1 a)))
* [misc]backup-simplify:  Simplify (- (acos (/ -1 a))) into (- (acos (/ -1 a)))
* [misc]backup-simplify:  Simplify (/ (- (acos (/ -1 a))) -1) into (acos (/ -1 a))
* [misc]backup-simplify:  Simplify (/ 1 (acos (/ -1 a))) into (/ 1 (acos (/ -1 a)))
* [misc]taylor:  Taking taylor expansion of (/ 1 (/ (- (acos (/ 1 (- a)))) (/ 1 (- a)))) in a
* [misc]taylor:  Taking taylor expansion of (/ (- (acos (/ 1 (- a)))) (/ 1 (- a))) in a
* [misc]taylor:  Taking taylor expansion of (- (acos (/ 1 (- a)))) in a
* [misc]taylor:  Taking taylor expansion of (acos (/ 1 (- a))) in a
* [misc]backup-simplify:  Simplify (acos (/ 1 (- a))) into (acos (/ -1 a))
* [misc]taylor:  Taking taylor expansion of (/ 1 (- a)) in a
* [misc]taylor:  Taking taylor expansion of (- a) in a
* [misc]taylor:  Taking taylor expansion of a in a
* [misc]backup-simplify:  Simplify 0 into 0
* [misc]backup-simplify:  Simplify 1 into 1
* [misc]backup-simplify:  Simplify (- 0) into 0
* [misc]backup-simplify:  Simplify (- 1) into -1
* [misc]backup-simplify:  Simplify (- 1) into -1
* [misc]backup-simplify:  Simplify (/ 1 -1) into -1
* [misc]backup-simplify:  Simplify (- (acos (/ -1 a))) into (- (acos (/ -1 a)))
* [misc]backup-simplify:  Simplify (- (acos (/ -1 a))) into (- (acos (/ -1 a)))
* [misc]backup-simplify:  Simplify (/ (- (acos (/ -1 a))) -1) into (acos (/ -1 a))
* [misc]backup-simplify:  Simplify (/ 1 (acos (/ -1 a))) into (/ 1 (acos (/ -1 a)))
* [misc]backup-simplify:  Simplify (/ 1 (acos (/ -1 a))) into (/ 1 (acos (/ -1 a)))
* [misc]backup-simplify:  Simplify (- 0) into 0
* [misc]backup-simplify:  Simplify (- 0) into 0
* [misc]backup-simplify:  Simplify (- 1) into -1
* [misc]backup-simplify:  Simplify (- (+ (* -1 (/ 0 -1)))) into 0
* [misc]backup-simplify:  Simplify (- (/ 0 -1) (+ (* (acos (/ -1 a)) (/ 0 -1)))) into 0
* [misc]backup-simplify:  Simplify (- (+ (* (/ 1 (acos (/ -1 a))) (/ 0 (acos (/ -1 a)))))) 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 (- 1) into -1
* [misc]backup-simplify:  Simplify (- 0) into 0
* [misc]backup-simplify:  Simplify (- 1) into -1
* [misc]backup-simplify:  Simplify (- (+ (* -1 (/ 0 -1)) (* 0 (/ 0 -1)))) into 0
* [misc]backup-simplify:  Simplify (- (/ 0 -1) (+ (* (acos (/ -1 a)) (/ 0 -1)) (* 0 (/ 0 -1)))) into 0
* [misc]backup-simplify:  Simplify (- (+ (* (/ 1 (acos (/ -1 a))) (/ 0 (acos (/ -1 a)))) (* 0 (/ 0 (acos (/ -1 a)))))) 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 (- 1) into -1
* [misc]backup-simplify:  Simplify (- 0) into 0
* [misc]backup-simplify:  Simplify (- 1) into -1
* [misc]backup-simplify:  Simplify (- 0) into 0
* [misc]backup-simplify:  Simplify (- 1) into -1
* [misc]backup-simplify:  Simplify (- (+ (* -1 (/ 0 -1)) (* 0 (/ 0 -1)) (* 0 (/ 0 -1)))) into 0
* [misc]backup-simplify:  Simplify (- (/ 0 -1) (+ (* (acos (/ -1 a)) (/ 0 -1)) (* 0 (/ 0 -1)) (* 0 (/ 0 -1)))) into 0
* [misc]backup-simplify:  Simplify (- (+ (* (/ 1 (acos (/ -1 a))) (/ 0 (acos (/ -1 a)))) (* 0 (/ 0 (acos (/ -1 a)))) (* 0 (/ 0 (acos (/ -1 a)))))) 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 (- 1) into -1
* [misc]backup-simplify:  Simplify (- 0) into 0
* [misc]backup-simplify:  Simplify (- 1) into -1
* [misc]backup-simplify:  Simplify (- 0) into 0
* [misc]backup-simplify:  Simplify (- 1) into -1
* [misc]backup-simplify:  Simplify (- 0) into 0
* [misc]backup-simplify:  Simplify (- 1) into -1
* [misc]backup-simplify:  Simplify (- (+ (* -1 (/ 0 -1)) (* 0 (/ 0 -1)) (* 0 (/ 0 -1)) (* 0 (/ 0 -1)))) into 0
* [misc]backup-simplify:  Simplify (- (/ 0 -1) (+ (* (acos (/ -1 a)) (/ 0 -1)) (* 0 (/ 0 -1)) (* 0 (/ 0 -1)) (* 0 (/ 0 -1)))) into 0
* [misc]backup-simplify:  Simplify (- (+ (* (/ 1 (acos (/ -1 a))) (/ 0 (acos (/ -1 a)))) (* 0 (/ 0 (acos (/ -1 a)))) (* 0 (/ 0 (acos (/ -1 a)))) (* 0 (/ 0 (acos (/ -1 a)))))) 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 (- 1) into -1
* [misc]backup-simplify:  Simplify (- 0) into 0
* [misc]backup-simplify:  Simplify (- 1) into -1
* [misc]backup-simplify:  Simplify (- 0) into 0
* [misc]backup-simplify:  Simplify (- 1) into -1
* [misc]backup-simplify:  Simplify (- 0) into 0
* [misc]backup-simplify:  Simplify (- 1) into -1
* [misc]backup-simplify:  Simplify (- 0) into 0
* [misc]backup-simplify:  Simplify (- 1) into -1
* [misc]backup-simplify:  Simplify (- (+ (* -1 (/ 0 -1)) (* 0 (/ 0 -1)) (* 0 (/ 0 -1)) (* 0 (/ 0 -1)) (* 0 (/ 0 -1)))) into 0
* [misc]backup-simplify:  Simplify (- (/ 0 -1) (+ (* (acos (/ -1 a)) (/ 0 -1)) (* 0 (/ 0 -1)) (* 0 (/ 0 -1)) (* 0 (/ 0 -1)) (* 0 (/ 0 -1)))) into 0
* [misc]backup-simplify:  Simplify (- (+ (* (/ 1 (acos (/ -1 a))) (/ 0 (acos (/ -1 a)))) (* 0 (/ 0 (acos (/ -1 a)))) (* 0 (/ 0 (acos (/ -1 a)))) (* 0 (/ 0 (acos (/ -1 a)))) (* 0 (/ 0 (acos (/ -1 a)))))) 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 (- 1) into -1
* [misc]backup-simplify:  Simplify (- 0) into 0
* [misc]backup-simplify:  Simplify (- 1) into -1
* [misc]backup-simplify:  Simplify (- 0) into 0
* [misc]backup-simplify:  Simplify (- 1) into -1
* [misc]backup-simplify:  Simplify (- 0) into 0
* [misc]backup-simplify:  Simplify (- 1) into -1
* [misc]backup-simplify:  Simplify (- 0) into 0
* [misc]backup-simplify:  Simplify (- 1) into -1
* [misc]backup-simplify:  Simplify (- 0) into 0
* [misc]backup-simplify:  Simplify (- 1) into -1
* [misc]backup-simplify:  Simplify (- (+ (* -1 (/ 0 -1)) (* 0 (/ 0 -1)) (* 0 (/ 0 -1)) (* 0 (/ 0 -1)) (* 0 (/ 0 -1)) (* 0 (/ 0 -1)))) into 0
* [misc]backup-simplify:  Simplify (- (/ 0 -1) (+ (* (acos (/ -1 a)) (/ 0 -1)) (* 0 (/ 0 -1)) (* 0 (/ 0 -1)) (* 0 (/ 0 -1)) (* 0 (/ 0 -1)) (* 0 (/ 0 -1)))) into 0
* [misc]backup-simplify:  Simplify (- (+ (* (/ 1 (acos (/ -1 a))) (/ 0 (acos (/ -1 a)))) (* 0 (/ 0 (acos (/ -1 a)))) (* 0 (/ 0 (acos (/ -1 a)))) (* 0 (/ 0 (acos (/ -1 a)))) (* 0 (/ 0 (acos (/ -1 a)))) (* 0 (/ 0 (acos (/ -1 a)))))) into 0
* [misc]backup-simplify:  Simplify 0 into 0
* [misc]backup-simplify:  Simplify (* (/ 1 (acos (/ -1 (/ 1 (- a))))) (/ 1 (/ 1 (- a)))) into (* -1 (/ a (acos a)))
* * * [misc]progress:  simplifying candidates
* * * * [misc]progress:  [ 1 / 50 ] simplifiying candidate #<alt (λ (a) (/ 1 (log1p (expm1 (/ (- (acos a)) a)))))>
* * * * [misc]progress:  [ 2 / 50 ] simplifiying candidate #<alt (λ (a) (/ 1 (expm1 (log1p (/ (- (acos a)) a)))))>
* * * * [misc]progress:  [ 3 / 50 ] simplifiying candidate #<alt (λ (a) (/ 1 (pow (/ (- (acos a)) a) 1)))>
* * * * [misc]progress:  [ 4 / 50 ] simplifiying candidate #<alt (λ (a) (/ 1 (exp (log (/ (- (acos a)) a)))))>
* * * * [misc]progress:  [ 5 / 50 ] simplifiying candidate #<alt (λ (a) (/ 1 (log (exp (/ (- (acos a)) a)))))>
* * * * [misc]progress:  [ 6 / 50 ] simplifiying candidate #<alt (λ (a) (/ 1 (* (* (cbrt (/ (- (acos a)) a)) (cbrt (/ (- (acos a)) a))) (cbrt (/ (- (acos a)) a)))))>
* * * * [misc]progress:  [ 7 / 50 ] simplifiying candidate #<alt (λ (a) (/ 1 (cbrt (* (* (/ (- (acos a)) a) (/ (- (acos a)) a)) (/ (- (acos a)) a)))))>
* * * * [misc]progress:  [ 8 / 50 ] simplifiying candidate #<alt (λ (a) (/ 1 (* (sqrt (/ (- (acos a)) a)) (sqrt (/ (- (acos a)) a)))))>
* * * * [misc]progress:  [ 9 / 50 ] simplifiying candidate #<alt (λ (a) (/ 1 (/ (- (- (acos a))) (- a))))>
* * * * [misc]progress:  [ 10 / 50 ] simplifiying candidate #<alt (λ (a) (/ 1 (- (/ 0 a) (/ (acos a) a))))>
* [enter]simplify:  Simplifying (/ 0 a)
* * [misc]simplify:  iters left: 2 (3 enodes)
* [exit]simplify:  Simplified to 0
* [misc]simplify:  Simplified (2 2 1) to (λ (a) (/ 1 (- 0 (/ (acos a) a))))
* * * * [misc]progress:  [ 11 / 50 ] simplifiying candidate #<alt (λ (a) (/ 1 (* 1 (/ (- (acos a)) a))))>
* * * * [misc]progress:  [ 12 / 50 ] simplifiying candidate #<alt (λ (a) (/ 1 (* (- (acos a)) (/ 1 a))))>
* * * * [misc]progress:  [ 13 / 50 ] simplifiying candidate #<alt (λ (a) (/ 1 (/ 1 (/ a (- (acos a))))))>
* * * * [misc]progress:  [ 14 / 50 ] simplifiying candidate #<alt (λ (a) (/ 1 (- (/ (acos a) a))))>
* [enter]simplify:  Simplifying (/ (acos a) a)
* * [misc]simplify:  iters left: 3 (3 enodes)
* [exit]simplify:  Simplified to (/ (acos a) a)
* [misc]simplify:  Simplified (2 2 1) to (λ (a) (/ 1 (- (/ (acos a) a))))
* * * * [misc]progress:  [ 15 / 50 ] simplifiying candidate #<alt (λ (a) (/ 1 (/ (* (cbrt (- (acos a))) (cbrt (- (acos a)))) (/ a (cbrt (- (acos a)))))))>
* [enter]simplify:  Simplifying (* (cbrt (- (acos a))) (cbrt (- (acos a))))
* * [misc]simplify:  iters left: 6 (5 enodes)
* [exit]simplify:  Simplified to (* (cbrt (- (acos a))) (cbrt (- (acos a))))
* [misc]simplify:  Simplified (2 2 1) to (λ (a) (/ 1 (/ (* (cbrt (- (acos a))) (cbrt (- (acos a)))) (/ a (cbrt (- (acos a)))))))
* * * * [misc]progress:  [ 16 / 50 ] simplifiying candidate #<alt (λ (a) (/ 1 (/ (sqrt (- (acos a))) (/ a (sqrt (- (acos a)))))))>
* [enter]simplify:  Simplifying (sqrt (- (acos a)))
* * [misc]simplify:  iters left: 4 (4 enodes)
* [exit]simplify:  Simplified to (sqrt (- (acos a)))
* [misc]simplify:  Simplified (2 2 1) to (λ (a) (/ 1 (/ (sqrt (- (acos a))) (/ a (sqrt (- (acos a)))))))
* * * * [misc]progress:  [ 17 / 50 ] simplifiying candidate #<alt (λ (a) (/ 1 (/ 1 (/ a (- (acos a))))))>
* * * * [misc]progress:  [ 18 / 50 ] simplifiying candidate #<alt (λ (a) (/ 1 (/ -1 (/ a (acos a)))))>
* * * * [misc]progress:  [ 19 / 50 ] simplifiying candidate #<alt (λ (a) (/ 1 (/ (- (* (cbrt (acos a)) (cbrt (acos a)))) (/ a (cbrt (acos a))))))>
* [enter]simplify:  Simplifying (- (* (cbrt (acos a)) (cbrt (acos a))))
* * [misc]simplify:  iters left: 6 (5 enodes)
* * [misc]simplify:  iters left: 5 (8 enodes)
* [exit]simplify:  Simplified to (* (cbrt (acos a)) (- (cbrt (acos a))))
* [misc]simplify:  Simplified (2 2 1) to (λ (a) (/ 1 (/ (* (cbrt (acos a)) (- (cbrt (acos a)))) (/ a (cbrt (acos a))))))
* * * * [misc]progress:  [ 20 / 50 ] simplifiying candidate #<alt (λ (a) (/ 1 (/ (- (sqrt (acos a))) (/ a (sqrt (acos a))))))>
* [enter]simplify:  Simplifying (- (sqrt (acos a)))
* * [misc]simplify:  iters left: 4 (4 enodes)
* [exit]simplify:  Simplified to (- (sqrt (acos a)))
* [misc]simplify:  Simplified (2 2 1) to (λ (a) (/ 1 (/ (- (sqrt (acos a))) (/ a (sqrt (acos a))))))
* * * * [misc]progress:  [ 21 / 50 ] simplifiying candidate #<alt (λ (a) (/ 1 (/ (- 1) (/ a (acos a)))))>
* [enter]simplify:  Simplifying (- 1)
* * [misc]simplify:  iters left: 2 (2 enodes)
* * [misc]simplify:  iters left: 1 (4 enodes)
* [exit]simplify:  Simplified to (- 1)
* [misc]simplify:  Simplified (2 2 1) to (λ (a) (/ 1 (/ (- 1) (/ a (acos a)))))
* * * * [misc]progress:  [ 22 / 50 ] simplifiying candidate #<alt (λ (a) (/ 1 (/ (* (cbrt (acos a)) (cbrt (acos a))) (/ a (- (cbrt (acos a)))))))>
* [enter]simplify:  Simplifying (* (cbrt (acos a)) (cbrt (acos a)))
* * [misc]simplify:  iters left: 4 (4 enodes)
* [exit]simplify:  Simplified to (* (cbrt (acos a)) (cbrt (acos a)))
* [misc]simplify:  Simplified (2 2 1) to (λ (a) (/ 1 (/ (* (cbrt (acos a)) (cbrt (acos a))) (/ a (- (cbrt (acos a)))))))
* * * * [misc]progress:  [ 23 / 50 ] simplifiying candidate #<alt (λ (a) (/ 1 (/ (sqrt (acos a)) (/ a (- (sqrt (acos a)))))))>
* [enter]simplify:  Simplifying (sqrt (acos a))
* * [misc]simplify:  iters left: 2 (3 enodes)
* [exit]simplify:  Simplified to (sqrt (acos a))
* [misc]simplify:  Simplified (2 2 1) to (λ (a) (/ 1 (/ (sqrt (acos a)) (/ a (- (sqrt (acos a)))))))
* * * * [misc]progress:  [ 24 / 50 ] simplifiying candidate #<alt (λ (a) (/ 1 (/ 1 (/ a (- (acos a))))))>
* * * * [misc]progress:  [ 25 / 50 ] simplifiying candidate #<alt (λ (a) (log1p (expm1 (/ 1 (/ (- (acos a)) a)))))>
* * * * [misc]progress:  [ 26 / 50 ] simplifiying candidate #<alt (λ (a) (expm1 (log1p (/ 1 (/ (- (acos a)) a)))))>
* * * * [misc]progress:  [ 27 / 50 ] simplifiying candidate #<alt (λ (a) (pow (/ (- (acos a)) a) -1))>
* * * * [misc]progress:  [ 28 / 50 ] simplifiying candidate #<alt (λ (a) (pow (/ (- (acos a)) a) (- 1)))>
* [enter]simplify:  Simplifying (- 1)
* * [misc]simplify:  iters left: 2 (2 enodes)
* * [misc]simplify:  iters left: 1 (4 enodes)
* [exit]simplify:  Simplified to (- 1)
* [misc]simplify:  Simplified (2 2) to (λ (a) (pow (/ (- (acos a)) a) (- 1)))
* * * * [misc]progress:  [ 29 / 50 ] simplifiying candidate #<alt (λ (a) (pow (/ 1 (/ (- (acos a)) a)) 1))>
* * * * [misc]progress:  [ 30 / 50 ] simplifiying candidate #<alt (λ (a) (exp (- (log (/ (- (acos a)) a)))))>
* * * * [misc]progress:  [ 31 / 50 ] simplifiying candidate #<alt (λ (a) (exp (log (/ 1 (/ (- (acos a)) a)))))>
* * * * [misc]progress:  [ 32 / 50 ] simplifiying candidate #<alt (λ (a) (log (exp (/ 1 (/ (- (acos a)) a)))))>
* * * * [misc]progress:  [ 33 / 50 ] simplifiying candidate #<alt (λ (a) (* (* (cbrt (/ 1 (/ (- (acos a)) a))) (cbrt (/ 1 (/ (- (acos a)) a)))) (cbrt (/ 1 (/ (- (acos a)) a)))))>
* * * * [misc]progress:  [ 34 / 50 ] simplifiying candidate #<alt (λ (a) (cbrt (* (* (/ 1 (/ (- (acos a)) a)) (/ 1 (/ (- (acos a)) a))) (/ 1 (/ (- (acos a)) a)))))>
* * * * [misc]progress:  [ 35 / 50 ] simplifiying candidate #<alt (λ (a) (* (sqrt (/ 1 (/ (- (acos a)) a))) (sqrt (/ 1 (/ (- (acos a)) a)))))>
* * * * [misc]progress:  [ 36 / 50 ] simplifiying candidate #<alt (λ (a) (/ (- 1) (- (/ (- (acos a)) a))))>
* * * * [misc]progress:  [ 37 / 50 ] simplifiying candidate #<alt (λ (a) (* 1 (/ 1 (/ (- (acos a)) a))))>
* * * * [misc]progress:  [ 38 / 50 ] simplifiying candidate #<alt (λ (a) (* 1 (/ 1 (/ (- (acos a)) a))))>
* * * * [misc]progress:  [ 39 / 50 ] simplifiying candidate #<alt (λ (a) (/ 1 (/ (/ (- (acos a)) a) 1)))>
* * * * [misc]progress:  [ 40 / 50 ] simplifiying candidate #<alt (λ (a) (/ (/ 1 (* (cbrt (/ (- (acos a)) a)) (cbrt (/ (- (acos a)) a)))) (cbrt (/ (- (acos a)) a))))>
* [enter]simplify:  Simplifying (cbrt (/ (- (acos a)) a))
* * [misc]simplify:  iters left: 6 (5 enodes)
* * [misc]simplify:  iters left: 5 (7 enodes)
* [exit]simplify:  Simplified to (cbrt (- (/ (acos a) a)))
* [misc]simplify:  Simplified (2 2) to (λ (a) (/ (/ 1 (* (cbrt (/ (- (acos a)) a)) (cbrt (/ (- (acos a)) a)))) (cbrt (- (/ (acos a) a)))))
* * * * [misc]progress:  [ 41 / 50 ] simplifiying candidate #<alt (λ (a) (/ (/ 1 (sqrt (/ (- (acos a)) a))) (sqrt (/ (- (acos a)) a))))>
* [enter]simplify:  Simplifying (sqrt (/ (- (acos a)) a))
* * [misc]simplify:  iters left: 6 (5 enodes)
* * [misc]simplify:  iters left: 5 (7 enodes)
* [exit]simplify:  Simplified to (sqrt (- (/ (acos a) a)))
* [misc]simplify:  Simplified (2 2) to (λ (a) (/ (/ 1 (sqrt (/ (- (acos a)) a))) (sqrt (- (/ (acos a) a)))))
* * * * [misc]progress:  [ 42 / 50 ] simplifiying candidate #<alt (λ (a) (/ (/ 1 1) (/ (- (acos a)) a)))>
* [enter]simplify:  Simplifying (/ (- (acos a)) a)
* * [misc]simplify:  iters left: 5 (4 enodes)
* * [misc]simplify:  iters left: 4 (6 enodes)
* [exit]simplify:  Simplified to (- (/ (acos a) a))
* [misc]simplify:  Simplified (2 2) to (λ (a) (/ (/ 1 1) (- (/ (acos a) a))))
* * * * [misc]progress:  [ 43 / 50 ] simplifiying candidate #<alt (λ (a) (/ (/ 1 (- (acos a))) (/ 1 a)))>
* [enter]simplify:  Simplifying (/ 1 a)
* * [misc]simplify:  iters left: 2 (3 enodes)
* * [misc]simplify:  iters left: 1 (5 enodes)
* [exit]simplify:  Simplified to (/ 1 a)
* [misc]simplify:  Simplified (2 2) to (λ (a) (/ (/ 1 (- (acos a))) (/ 1 a)))
* * * * [misc]progress:  [ 44 / 50 ] simplifiying candidate #<alt (λ (a) (* (/ 1 (- (acos a))) a))>
* * * * [misc]progress:  [ 45 / 50 ] simplifiying candidate #<alt (λ (a) (/ 1 (* -1 (/ (acos a) a))))>
* [enter]simplify:  Simplifying (* -1 (/ (acos a) a))
* * [misc]simplify:  iters left: 5 (5 enodes)
* * [misc]simplify:  iters left: 4 (9 enodes)
* * [misc]simplify:  iters left: 3 (14 enodes)
* * [misc]simplify:  iters left: 2 (16 enodes)
* * [misc]simplify:  iters left: 1 (18 enodes)
* [exit]simplify:  Simplified to (/ (acos a) (/ a -1))
* [misc]simplify:  Simplified (2 2) to (λ (a) (/ 1 (/ (acos a) (/ a -1))))
* * * * [misc]progress:  [ 46 / 50 ] simplifiying candidate #<alt (λ (a) (/ 1 (* -1 (/ (acos a) a))))>
* [enter]simplify:  Simplifying (* -1 (/ (acos a) a))
* * [misc]simplify:  iters left: 5 (5 enodes)
* * [misc]simplify:  iters left: 4 (9 enodes)
* * [misc]simplify:  iters left: 3 (14 enodes)
* * [misc]simplify:  iters left: 2 (16 enodes)
* * [misc]simplify:  iters left: 1 (18 enodes)
* [exit]simplify:  Simplified to (/ (acos a) (/ a -1))
* [misc]simplify:  Simplified (2 2) to (λ (a) (/ 1 (/ (acos a) (/ a -1))))
* * * * [misc]progress:  [ 47 / 50 ] simplifiying candidate #<alt (λ (a) (/ 1 (* -1 (/ (acos a) a))))>
* [enter]simplify:  Simplifying (* -1 (/ (acos a) a))
* * [misc]simplify:  iters left: 5 (5 enodes)
* * [misc]simplify:  iters left: 4 (9 enodes)
* * [misc]simplify:  iters left: 3 (14 enodes)
* * [misc]simplify:  iters left: 2 (16 enodes)
* * [misc]simplify:  iters left: 1 (18 enodes)
* [exit]simplify:  Simplified to (/ (acos a) (/ a -1))
* [misc]simplify:  Simplified (2 2) to (λ (a) (/ 1 (/ (acos a) (/ a -1))))
* * * * [misc]progress:  [ 48 / 50 ] simplifiying candidate #<alt (λ (a) (* -1 (/ a (acos a))))>
* [enter]simplify:  Simplifying (* -1 (/ a (acos a)))
* * [misc]simplify:  iters left: 5 (5 enodes)
* * [misc]simplify:  iters left: 4 (9 enodes)
* * [misc]simplify:  iters left: 3 (14 enodes)
* * [misc]simplify:  iters left: 2 (16 enodes)
* * [misc]simplify:  iters left: 1 (18 enodes)
* [exit]simplify:  Simplified to (/ (- a) (acos a))
* [misc]simplify:  Simplified (2) to (λ (a) (/ (- a) (acos a)))
* * * * [misc]progress:  [ 49 / 50 ] simplifiying candidate #<alt (λ (a) (* -1 (/ a (acos a))))>
* [enter]simplify:  Simplifying (* -1 (/ a (acos a)))
* * [misc]simplify:  iters left: 5 (5 enodes)
* * [misc]simplify:  iters left: 4 (9 enodes)
* * [misc]simplify:  iters left: 3 (14 enodes)
* * [misc]simplify:  iters left: 2 (16 enodes)
* * [misc]simplify:  iters left: 1 (18 enodes)
* [exit]simplify:  Simplified to (/ (- a) (acos a))
* [misc]simplify:  Simplified (2) to (λ (a) (/ (- a) (acos a)))
* * * * [misc]progress:  [ 50 / 50 ] simplifiying candidate #<alt (λ (a) (* -1 (/ a (acos a))))>
* [enter]simplify:  Simplifying (* -1 (/ a (acos a)))
* * [misc]simplify:  iters left: 5 (5 enodes)
* * [misc]simplify:  iters left: 4 (9 enodes)
* * [misc]simplify:  iters left: 3 (14 enodes)
* * [misc]simplify:  iters left: 2 (16 enodes)
* * [misc]simplify:  iters left: 1 (18 enodes)
* [exit]simplify:  Simplified to (/ (- a) (acos a))
* [misc]simplify:  Simplified (2) to (λ (a) (/ (- a) (acos a)))
* * * [misc]progress:  adding candidates to table
* * [misc]progress:  iteration 3 / 4
* * * [misc]progress:  picking best candidate
* * * * [misc]pick:  Picked  #<alt (λ (a) (/ 1 (* (- (acos a)) (/ 1 a))))>
* * * [misc]progress:  localizing error
* * * [misc]progress:  generating rewritten candidates
* * * * [misc]progress:  [ 1 / 2 ] rewriting at (2 2)
* * * * [misc]progress:  [ 2 / 2 ] rewriting at (2)
* * * [misc]progress:  generating series expansions
* * * * [misc]progress:  [ 1 / 2 ] generating series at (2 2)
* [misc]approximate:  Taking taylor expansion of (* (- (acos a)) (/ 1 a)) in (a) around 0
* [misc]taylor:  Taking taylor expansion of (* (- (acos a)) (/ 1 a)) in a
* [misc]taylor:  Taking taylor expansion of (- (acos a)) in a
* [misc]taylor:  Taking taylor expansion of (acos a) in a
* [misc]backup-simplify:  Simplify (acos a) into (acos a)
* [misc]taylor:  Taking taylor expansion of (/ 1 a) in a
* [misc]taylor:  Taking taylor expansion of a in a
* [misc]backup-simplify:  Simplify 0 into 0
* [misc]backup-simplify:  Simplify 1 into 1
* [misc]backup-simplify:  Simplify (/ 1 1) into 1
* [misc]taylor:  Taking taylor expansion of (* (- (acos a)) (/ 1 a)) in a
* [misc]taylor:  Taking taylor expansion of (- (acos a)) in a
* [misc]taylor:  Taking taylor expansion of (acos a) in a
* [misc]backup-simplify:  Simplify (acos a) into (acos a)
* [misc]taylor:  Taking taylor expansion of (/ 1 a) in a
* [misc]taylor:  Taking taylor expansion of a in a
* [misc]backup-simplify:  Simplify 0 into 0
* [misc]backup-simplify:  Simplify 1 into 1
* [misc]backup-simplify:  Simplify (/ 1 1) into 1
* [misc]backup-simplify:  Simplify (- (acos a)) into (- (acos a))
* [misc]backup-simplify:  Simplify (* (- (acos a)) 1) into (* -1 (acos a))
* [misc]backup-simplify:  Simplify (* -1 (acos a)) into (* -1 (acos a))
* [misc]backup-simplify:  Simplify (- (acos a)) into (- (acos a))
* [misc]backup-simplify:  Simplify (- (+ (* 1 (/ 0 1)))) into 0
* [misc]backup-simplify:  Simplify (- 0) into 0
* [misc]backup-simplify:  Simplify (+ (* (- (acos a)) 0) (* 0 1)) into 0
* [misc]backup-simplify:  Simplify 0 into 0
* [misc]backup-simplify:  Simplify (- (acos a)) into (- (acos a))
* [misc]backup-simplify:  Simplify (- (+ (* 1 (/ 0 1)) (* 0 (/ 0 1)))) into 0
* [misc]backup-simplify:  Simplify (- 0) into 0
* [misc]backup-simplify:  Simplify (- 0) into 0
* [misc]backup-simplify:  Simplify (+ (* (- (acos a)) 0) (+ (* 0 0) (* 0 1))) into 0
* [misc]backup-simplify:  Simplify 0 into 0
* [misc]backup-simplify:  Simplify (- (acos a)) into (- (acos a))
* [misc]backup-simplify:  Simplify (- (+ (* 1 (/ 0 1)) (* 0 (/ 0 1)) (* 0 (/ 0 1)))) 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 a)) 0) (+ (* 0 0) (+ (* 0 0) (* 0 1)))) into 0
* [misc]backup-simplify:  Simplify 0 into 0
* [misc]backup-simplify:  Simplify (- (acos a)) into (- (acos a))
* [misc]backup-simplify:  Simplify (- (+ (* 1 (/ 0 1)) (* 0 (/ 0 1)) (* 0 (/ 0 1)) (* 0 (/ 0 1)))) 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 a)) 0) (+ (* 0 0) (+ (* 0 0) (+ (* 0 0) (* 0 1))))) into 0
* [misc]backup-simplify:  Simplify 0 into 0
* [misc]backup-simplify:  Simplify (- (acos a)) into (- (acos a))
* [misc]backup-simplify:  Simplify (- (+ (* 1 (/ 0 1)) (* 0 (/ 0 1)) (* 0 (/ 0 1)) (* 0 (/ 0 1)) (* 0 (/ 0 1)))) 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 a)) 0) (+ (* 0 0) (+ (* 0 0) (+ (* 0 0) (+ (* 0 0) (* 0 1)))))) into 0
* [misc]backup-simplify:  Simplify 0 into 0
* [misc]backup-simplify:  Simplify (- (acos a)) into (- (acos a))
* [misc]backup-simplify:  Simplify (- (+ (* 1 (/ 0 1)) (* 0 (/ 0 1)) (* 0 (/ 0 1)) (* 0 (/ 0 1)) (* 0 (/ 0 1)) (* 0 (/ 0 1)))) 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 (- 0) into 0
* [misc]backup-simplify:  Simplify (+ (* (- (acos a)) 0) (+ (* 0 0) (+ (* 0 0) (+ (* 0 0) (+ (* 0 0) (+ (* 0 0) (* 0 1))))))) into 0
* [misc]backup-simplify:  Simplify 0 into 0
* [misc]backup-simplify:  Simplify (* (* -1 (acos a)) (/ 1 a)) into (* -1 (/ (acos a) a))
* [misc]approximate:  Taking taylor expansion of (* (- (acos (/ 1 a))) (/ 1 (/ 1 a))) in (a) around 0
* [misc]taylor:  Taking taylor expansion of (* (- (acos (/ 1 a))) (/ 1 (/ 1 a))) in a
* [misc]taylor:  Taking taylor expansion of (- (acos (/ 1 a))) in a
* [misc]taylor:  Taking taylor expansion of (acos (/ 1 a)) in a
* [misc]backup-simplify:  Simplify (acos (/ 1 a)) into (acos (/ 1 a))
* [misc]taylor:  Taking taylor expansion of (/ 1 (/ 1 a)) in a
* [misc]taylor:  Taking taylor expansion of (/ 1 a) in a
* [misc]taylor:  Taking taylor expansion of a in a
* [misc]backup-simplify:  Simplify 0 into 0
* [misc]backup-simplify:  Simplify 1 into 1
* [misc]backup-simplify:  Simplify (/ 1 1) into 1
* [misc]backup-simplify:  Simplify (/ 1 1) into 1
* [misc]taylor:  Taking taylor expansion of (* (- (acos (/ 1 a))) (/ 1 (/ 1 a))) in a
* [misc]taylor:  Taking taylor expansion of (- (acos (/ 1 a))) in a
* [misc]taylor:  Taking taylor expansion of (acos (/ 1 a)) in a
* [misc]backup-simplify:  Simplify (acos (/ 1 a)) into (acos (/ 1 a))
* [misc]taylor:  Taking taylor expansion of (/ 1 (/ 1 a)) in a
* [misc]taylor:  Taking taylor expansion of (/ 1 a) in a
* [misc]taylor:  Taking taylor expansion of a in a
* [misc]backup-simplify:  Simplify 0 into 0
* [misc]backup-simplify:  Simplify 1 into 1
* [misc]backup-simplify:  Simplify (/ 1 1) into 1
* [misc]backup-simplify:  Simplify (/ 1 1) into 1
* [misc]backup-simplify:  Simplify (- (acos (/ 1 a))) into (- (acos (/ 1 a)))
* [misc]backup-simplify:  Simplify (* (- (acos (/ 1 a))) 1) into (* -1 (acos (/ 1 a)))
* [misc]backup-simplify:  Simplify (* -1 (acos (/ 1 a))) into (* -1 (acos (/ 1 a)))
* [misc]backup-simplify:  Simplify (- (acos (/ 1 a))) into (- (acos (/ 1 a)))
* [misc]backup-simplify:  Simplify (- (+ (* 1 (/ 0 1)))) into 0
* [misc]backup-simplify:  Simplify (- (+ (* 1 (/ 0 1)))) into 0
* [misc]backup-simplify:  Simplify (- 0) into 0
* [misc]backup-simplify:  Simplify (+ (* (- (acos (/ 1 a))) 0) (* 0 1)) into 0
* [misc]backup-simplify:  Simplify 0 into 0
* [misc]backup-simplify:  Simplify (- (acos (/ 1 a))) into (- (acos (/ 1 a)))
* [misc]backup-simplify:  Simplify (- (+ (* 1 (/ 0 1)) (* 0 (/ 0 1)))) into 0
* [misc]backup-simplify:  Simplify (- (+ (* 1 (/ 0 1)) (* 0 (/ 0 1)))) into 0
* [misc]backup-simplify:  Simplify (- 0) into 0
* [misc]backup-simplify:  Simplify (- 0) into 0
* [misc]backup-simplify:  Simplify (+ (* (- (acos (/ 1 a))) 0) (+ (* 0 0) (* 0 1))) into 0
* [misc]backup-simplify:  Simplify 0 into 0
* [misc]backup-simplify:  Simplify (- (acos (/ 1 a))) into (- (acos (/ 1 a)))
* [misc]backup-simplify:  Simplify (- (+ (* 1 (/ 0 1)) (* 0 (/ 0 1)) (* 0 (/ 0 1)))) into 0
* [misc]backup-simplify:  Simplify (- (+ (* 1 (/ 0 1)) (* 0 (/ 0 1)) (* 0 (/ 0 1)))) 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 a))) 0) (+ (* 0 0) (+ (* 0 0) (* 0 1)))) into 0
* [misc]backup-simplify:  Simplify 0 into 0
* [misc]backup-simplify:  Simplify (- (acos (/ 1 a))) into (- (acos (/ 1 a)))
* [misc]backup-simplify:  Simplify (- (+ (* 1 (/ 0 1)) (* 0 (/ 0 1)) (* 0 (/ 0 1)) (* 0 (/ 0 1)))) into 0
* [misc]backup-simplify:  Simplify (- (+ (* 1 (/ 0 1)) (* 0 (/ 0 1)) (* 0 (/ 0 1)) (* 0 (/ 0 1)))) 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 a))) 0) (+ (* 0 0) (+ (* 0 0) (+ (* 0 0) (* 0 1))))) into 0
* [misc]backup-simplify:  Simplify 0 into 0
* [misc]backup-simplify:  Simplify (- (acos (/ 1 a))) into (- (acos (/ 1 a)))
* [misc]backup-simplify:  Simplify (- (+ (* 1 (/ 0 1)) (* 0 (/ 0 1)) (* 0 (/ 0 1)) (* 0 (/ 0 1)) (* 0 (/ 0 1)))) into 0
* [misc]backup-simplify:  Simplify (- (+ (* 1 (/ 0 1)) (* 0 (/ 0 1)) (* 0 (/ 0 1)) (* 0 (/ 0 1)) (* 0 (/ 0 1)))) 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 a))) 0) (+ (* 0 0) (+ (* 0 0) (+ (* 0 0) (+ (* 0 0) (* 0 1)))))) into 0
* [misc]backup-simplify:  Simplify 0 into 0
* [misc]backup-simplify:  Simplify (- (acos (/ 1 a))) into (- (acos (/ 1 a)))
* [misc]backup-simplify:  Simplify (- (+ (* 1 (/ 0 1)) (* 0 (/ 0 1)) (* 0 (/ 0 1)) (* 0 (/ 0 1)) (* 0 (/ 0 1)) (* 0 (/ 0 1)))) into 0
* [misc]backup-simplify:  Simplify (- (+ (* 1 (/ 0 1)) (* 0 (/ 0 1)) (* 0 (/ 0 1)) (* 0 (/ 0 1)) (* 0 (/ 0 1)) (* 0 (/ 0 1)))) 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 (- 0) into 0
* [misc]backup-simplify:  Simplify (+ (* (- (acos (/ 1 a))) 0) (+ (* 0 0) (+ (* 0 0) (+ (* 0 0) (+ (* 0 0) (+ (* 0 0) (* 0 1))))))) into 0
* [misc]backup-simplify:  Simplify 0 into 0
* [misc]backup-simplify:  Simplify (* (* -1 (acos (/ 1 (/ 1 a)))) (/ 1 a)) into (* -1 (/ (acos a) a))
* [misc]approximate:  Taking taylor expansion of (* (- (acos (/ 1 (- a)))) (/ 1 (/ 1 (- a)))) in (a) around 0
* [misc]taylor:  Taking taylor expansion of (* (- (acos (/ 1 (- a)))) (/ 1 (/ 1 (- a)))) in a
* [misc]taylor:  Taking taylor expansion of (- (acos (/ 1 (- a)))) in a
* [misc]taylor:  Taking taylor expansion of (acos (/ 1 (- a))) in a
* [misc]backup-simplify:  Simplify (acos (/ 1 (- a))) into (acos (/ -1 a))
* [misc]taylor:  Taking taylor expansion of (/ 1 (/ 1 (- a))) in a
* [misc]taylor:  Taking taylor expansion of (/ 1 (- a)) in a
* [misc]taylor:  Taking taylor expansion of (- a) in a
* [misc]taylor:  Taking taylor expansion of a in a
* [misc]backup-simplify:  Simplify 0 into 0
* [misc]backup-simplify:  Simplify 1 into 1
* [misc]backup-simplify:  Simplify (- 0) into 0
* [misc]backup-simplify:  Simplify (- 1) into -1
* [misc]backup-simplify:  Simplify (- 1) into -1
* [misc]backup-simplify:  Simplify (/ 1 -1) into -1
* [misc]backup-simplify:  Simplify (/ 1 -1) into -1
* [misc]taylor:  Taking taylor expansion of (* (- (acos (/ 1 (- a)))) (/ 1 (/ 1 (- a)))) in a
* [misc]taylor:  Taking taylor expansion of (- (acos (/ 1 (- a)))) in a
* [misc]taylor:  Taking taylor expansion of (acos (/ 1 (- a))) in a
* [misc]backup-simplify:  Simplify (acos (/ 1 (- a))) into (acos (/ -1 a))
* [misc]taylor:  Taking taylor expansion of (/ 1 (/ 1 (- a))) in a
* [misc]taylor:  Taking taylor expansion of (/ 1 (- a)) in a
* [misc]taylor:  Taking taylor expansion of (- a) in a
* [misc]taylor:  Taking taylor expansion of a in a
* [misc]backup-simplify:  Simplify 0 into 0
* [misc]backup-simplify:  Simplify 1 into 1
* [misc]backup-simplify:  Simplify (- 0) into 0
* [misc]backup-simplify:  Simplify (- 1) into -1
* [misc]backup-simplify:  Simplify (- 1) into -1
* [misc]backup-simplify:  Simplify (/ 1 -1) into -1
* [misc]backup-simplify:  Simplify (/ 1 -1) into -1
* [misc]backup-simplify:  Simplify (- (acos (/ -1 a))) into (- (acos (/ -1 a)))
* [misc]backup-simplify:  Simplify (* (- (acos (/ -1 a))) -1) into (acos (/ -1 a))
* [misc]backup-simplify:  Simplify (acos (/ -1 a)) into (acos (/ -1 a))
* [misc]backup-simplify:  Simplify (- (acos (/ -1 a))) into (- (acos (/ -1 a)))
* [misc]backup-simplify:  Simplify (- 0) into 0
* [misc]backup-simplify:  Simplify (- 1) into -1
* [misc]backup-simplify:  Simplify (- (+ (* -1 (/ 0 -1)))) into 0
* [misc]backup-simplify:  Simplify (- (+ (* -1 (/ 0 -1)))) into 0
* [misc]backup-simplify:  Simplify (- 0) into 0
* [misc]backup-simplify:  Simplify (+ (* (- (acos (/ -1 a))) 0) (* 0 -1)) into 0
* [misc]backup-simplify:  Simplify 0 into 0
* [misc]backup-simplify:  Simplify (- (acos (/ -1 a))) into (- (acos (/ -1 a)))
* [misc]backup-simplify:  Simplify (- 0) into 0
* [misc]backup-simplify:  Simplify (- 1) into -1
* [misc]backup-simplify:  Simplify (- 0) into 0
* [misc]backup-simplify:  Simplify (- 1) into -1
* [misc]backup-simplify:  Simplify (- (+ (* -1 (/ 0 -1)) (* 0 (/ 0 -1)))) into 0
* [misc]backup-simplify:  Simplify (- (+ (* -1 (/ 0 -1)) (* 0 (/ 0 -1)))) into 0
* [misc]backup-simplify:  Simplify (- 0) into 0
* [misc]backup-simplify:  Simplify (- 0) into 0
* [misc]backup-simplify:  Simplify (+ (* (- (acos (/ -1 a))) 0) (+ (* 0 0) (* 0 -1))) into 0
* [misc]backup-simplify:  Simplify 0 into 0
* [misc]backup-simplify:  Simplify (- (acos (/ -1 a))) into (- (acos (/ -1 a)))
* [misc]backup-simplify:  Simplify (- 0) into 0
* [misc]backup-simplify:  Simplify (- 1) into -1
* [misc]backup-simplify:  Simplify (- 0) into 0
* [misc]backup-simplify:  Simplify (- 1) into -1
* [misc]backup-simplify:  Simplify (- 0) into 0
* [misc]backup-simplify:  Simplify (- 1) into -1
* [misc]backup-simplify:  Simplify (- (+ (* -1 (/ 0 -1)) (* 0 (/ 0 -1)) (* 0 (/ 0 -1)))) into 0
* [misc]backup-simplify:  Simplify (- (+ (* -1 (/ 0 -1)) (* 0 (/ 0 -1)) (* 0 (/ 0 -1)))) 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 a))) 0) (+ (* 0 0) (+ (* 0 0) (* 0 -1)))) into 0
* [misc]backup-simplify:  Simplify 0 into 0
* [misc]backup-simplify:  Simplify (- (acos (/ -1 a))) into (- (acos (/ -1 a)))
* [misc]backup-simplify:  Simplify (- 0) into 0
* [misc]backup-simplify:  Simplify (- 1) into -1
* [misc]backup-simplify:  Simplify (- 0) into 0
* [misc]backup-simplify:  Simplify (- 1) into -1
* [misc]backup-simplify:  Simplify (- 0) into 0
* [misc]backup-simplify:  Simplify (- 1) into -1
* [misc]backup-simplify:  Simplify (- 0) into 0
* [misc]backup-simplify:  Simplify (- 1) into -1
* [misc]backup-simplify:  Simplify (- (+ (* -1 (/ 0 -1)) (* 0 (/ 0 -1)) (* 0 (/ 0 -1)) (* 0 (/ 0 -1)))) into 0
* [misc]backup-simplify:  Simplify (- (+ (* -1 (/ 0 -1)) (* 0 (/ 0 -1)) (* 0 (/ 0 -1)) (* 0 (/ 0 -1)))) 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 a))) 0) (+ (* 0 0) (+ (* 0 0) (+ (* 0 0) (* 0 -1))))) into 0
* [misc]backup-simplify:  Simplify 0 into 0
* [misc]backup-simplify:  Simplify (- (acos (/ -1 a))) into (- (acos (/ -1 a)))
* [misc]backup-simplify:  Simplify (- 0) into 0
* [misc]backup-simplify:  Simplify (- 1) into -1
* [misc]backup-simplify:  Simplify (- 0) into 0
* [misc]backup-simplify:  Simplify (- 1) into -1
* [misc]backup-simplify:  Simplify (- 0) into 0
* [misc]backup-simplify:  Simplify (- 1) into -1
* [misc]backup-simplify:  Simplify (- 0) into 0
* [misc]backup-simplify:  Simplify (- 1) into -1
* [misc]backup-simplify:  Simplify (- 0) into 0
* [misc]backup-simplify:  Simplify (- 1) into -1
* [misc]backup-simplify:  Simplify (- (+ (* -1 (/ 0 -1)) (* 0 (/ 0 -1)) (* 0 (/ 0 -1)) (* 0 (/ 0 -1)) (* 0 (/ 0 -1)))) into 0
* [misc]backup-simplify:  Simplify (- (+ (* -1 (/ 0 -1)) (* 0 (/ 0 -1)) (* 0 (/ 0 -1)) (* 0 (/ 0 -1)) (* 0 (/ 0 -1)))) 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 a))) 0) (+ (* 0 0) (+ (* 0 0) (+ (* 0 0) (+ (* 0 0) (* 0 -1)))))) into 0
* [misc]backup-simplify:  Simplify 0 into 0
* [misc]backup-simplify:  Simplify (- (acos (/ -1 a))) into (- (acos (/ -1 a)))
* [misc]backup-simplify:  Simplify (- 0) into 0
* [misc]backup-simplify:  Simplify (- 1) into -1
* [misc]backup-simplify:  Simplify (- 0) into 0
* [misc]backup-simplify:  Simplify (- 1) into -1
* [misc]backup-simplify:  Simplify (- 0) into 0
* [misc]backup-simplify:  Simplify (- 1) into -1
* [misc]backup-simplify:  Simplify (- 0) into 0
* [misc]backup-simplify:  Simplify (- 1) into -1
* [misc]backup-simplify:  Simplify (- 0) into 0
* [misc]backup-simplify:  Simplify (- 1) into -1
* [misc]backup-simplify:  Simplify (- 0) into 0
* [misc]backup-simplify:  Simplify (- 1) into -1
* [misc]backup-simplify:  Simplify (- (+ (* -1 (/ 0 -1)) (* 0 (/ 0 -1)) (* 0 (/ 0 -1)) (* 0 (/ 0 -1)) (* 0 (/ 0 -1)) (* 0 (/ 0 -1)))) into 0
* [misc]backup-simplify:  Simplify (- (+ (* -1 (/ 0 -1)) (* 0 (/ 0 -1)) (* 0 (/ 0 -1)) (* 0 (/ 0 -1)) (* 0 (/ 0 -1)) (* 0 (/ 0 -1)))) 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 (- 0) into 0
* [misc]backup-simplify:  Simplify (+ (* (- (acos (/ -1 a))) 0) (+ (* 0 0) (+ (* 0 0) (+ (* 0 0) (+ (* 0 0) (+ (* 0 0) (* 0 -1))))))) into 0
* [misc]backup-simplify:  Simplify 0 into 0
* [misc]backup-simplify:  Simplify (* (acos (/ -1 (/ 1 (- a)))) (/ 1 (- a))) into (* -1 (/ (acos a) a))
* * * * [misc]progress:  [ 2 / 2 ] generating series at (2)
* [misc]approximate:  Taking taylor expansion of (/ 1 (* (- (acos a)) (/ 1 a))) in (a) around 0
* [misc]taylor:  Taking taylor expansion of (/ 1 (* (- (acos a)) (/ 1 a))) in a
* [misc]taylor:  Taking taylor expansion of (* (- (acos a)) (/ 1 a)) in a
* [misc]taylor:  Taking taylor expansion of (- (acos a)) in a
* [misc]taylor:  Taking taylor expansion of (acos a) in a
* [misc]backup-simplify:  Simplify (acos a) into (acos a)
* [misc]taylor:  Taking taylor expansion of (/ 1 a) in a
* [misc]taylor:  Taking taylor expansion of a in a
* [misc]backup-simplify:  Simplify 0 into 0
* [misc]backup-simplify:  Simplify 1 into 1
* [misc]backup-simplify:  Simplify (/ 1 1) into 1
* [misc]backup-simplify:  Simplify (- (acos a)) into (- (acos a))
* [misc]backup-simplify:  Simplify (* (- (acos a)) 1) into (* -1 (acos a))
* [misc]backup-simplify:  Simplify (/ 1 (* -1 (acos a))) into (/ -1 (acos a))
* [misc]taylor:  Taking taylor expansion of (/ 1 (* (- (acos a)) (/ 1 a))) in a
* [misc]taylor:  Taking taylor expansion of (* (- (acos a)) (/ 1 a)) in a
* [misc]taylor:  Taking taylor expansion of (- (acos a)) in a
* [misc]taylor:  Taking taylor expansion of (acos a) in a
* [misc]backup-simplify:  Simplify (acos a) into (acos a)
* [misc]taylor:  Taking taylor expansion of (/ 1 a) in a
* [misc]taylor:  Taking taylor expansion of a in a
* [misc]backup-simplify:  Simplify 0 into 0
* [misc]backup-simplify:  Simplify 1 into 1
* [misc]backup-simplify:  Simplify (/ 1 1) into 1
* [misc]backup-simplify:  Simplify (- (acos a)) into (- (acos a))
* [misc]backup-simplify:  Simplify (* (- (acos a)) 1) into (* -1 (acos a))
* [misc]backup-simplify:  Simplify (/ 1 (* -1 (acos a))) into (/ -1 (acos a))
* [misc]backup-simplify:  Simplify (/ -1 (acos a)) into (/ -1 (acos a))
* [misc]backup-simplify:  Simplify (- (acos a)) into (- (acos a))
* [misc]backup-simplify:  Simplify (- (+ (* 1 (/ 0 1)))) into 0
* [misc]backup-simplify:  Simplify (- 0) into 0
* [misc]backup-simplify:  Simplify (+ (* (- (acos a)) 0) (* 0 1)) into 0
* [misc]backup-simplify:  Simplify (- (+ (* (/ -1 (acos a)) (/ 0 (* -1 (acos a)))))) into 0
* [misc]backup-simplify:  Simplify 0 into 0
* [misc]backup-simplify:  Simplify (- (acos a)) into (- (acos a))
* [misc]backup-simplify:  Simplify (- (+ (* 1 (/ 0 1)) (* 0 (/ 0 1)))) into 0
* [misc]backup-simplify:  Simplify (- 0) into 0
* [misc]backup-simplify:  Simplify (- 0) into 0
* [misc]backup-simplify:  Simplify (+ (* (- (acos a)) 0) (+ (* 0 0) (* 0 1))) into 0
* [misc]backup-simplify:  Simplify (- (+ (* (/ -1 (acos a)) (/ 0 (* -1 (acos a)))) (* 0 (/ 0 (* -1 (acos a)))))) into 0
* [misc]backup-simplify:  Simplify 0 into 0
* [misc]backup-simplify:  Simplify (- (acos a)) into (- (acos a))
* [misc]backup-simplify:  Simplify (- (+ (* 1 (/ 0 1)) (* 0 (/ 0 1)) (* 0 (/ 0 1)))) 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 a)) 0) (+ (* 0 0) (+ (* 0 0) (* 0 1)))) into 0
* [misc]backup-simplify:  Simplify (- (+ (* (/ -1 (acos a)) (/ 0 (* -1 (acos a)))) (* 0 (/ 0 (* -1 (acos a)))) (* 0 (/ 0 (* -1 (acos a)))))) into 0
* [misc]backup-simplify:  Simplify 0 into 0
* [misc]backup-simplify:  Simplify (- (acos a)) into (- (acos a))
* [misc]backup-simplify:  Simplify (- (+ (* 1 (/ 0 1)) (* 0 (/ 0 1)) (* 0 (/ 0 1)) (* 0 (/ 0 1)))) 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 a)) 0) (+ (* 0 0) (+ (* 0 0) (+ (* 0 0) (* 0 1))))) into 0
* [misc]backup-simplify:  Simplify (- (+ (* (/ -1 (acos a)) (/ 0 (* -1 (acos a)))) (* 0 (/ 0 (* -1 (acos a)))) (* 0 (/ 0 (* -1 (acos a)))) (* 0 (/ 0 (* -1 (acos a)))))) into 0
* [misc]backup-simplify:  Simplify 0 into 0
* [misc]backup-simplify:  Simplify (- (acos a)) into (- (acos a))
* [misc]backup-simplify:  Simplify (- (+ (* 1 (/ 0 1)) (* 0 (/ 0 1)) (* 0 (/ 0 1)) (* 0 (/ 0 1)) (* 0 (/ 0 1)))) 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 a)) 0) (+ (* 0 0) (+ (* 0 0) (+ (* 0 0) (+ (* 0 0) (* 0 1)))))) into 0
* [misc]backup-simplify:  Simplify (- (+ (* (/ -1 (acos a)) (/ 0 (* -1 (acos a)))) (* 0 (/ 0 (* -1 (acos a)))) (* 0 (/ 0 (* -1 (acos a)))) (* 0 (/ 0 (* -1 (acos a)))) (* 0 (/ 0 (* -1 (acos a)))))) into 0
* [misc]backup-simplify:  Simplify 0 into 0
* [misc]backup-simplify:  Simplify (- (acos a)) into (- (acos a))
* [misc]backup-simplify:  Simplify (- (+ (* 1 (/ 0 1)) (* 0 (/ 0 1)) (* 0 (/ 0 1)) (* 0 (/ 0 1)) (* 0 (/ 0 1)) (* 0 (/ 0 1)))) 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 (- 0) into 0
* [misc]backup-simplify:  Simplify (+ (* (- (acos a)) 0) (+ (* 0 0) (+ (* 0 0) (+ (* 0 0) (+ (* 0 0) (+ (* 0 0) (* 0 1))))))) into 0
* [misc]backup-simplify:  Simplify (- (+ (* (/ -1 (acos a)) (/ 0 (* -1 (acos a)))) (* 0 (/ 0 (* -1 (acos a)))) (* 0 (/ 0 (* -1 (acos a)))) (* 0 (/ 0 (* -1 (acos a)))) (* 0 (/ 0 (* -1 (acos a)))) (* 0 (/ 0 (* -1 (acos a)))))) into 0
* [misc]backup-simplify:  Simplify 0 into 0
* [misc]backup-simplify:  Simplify (* (/ -1 (acos a)) a) into (* -1 (/ a (acos a)))
* [misc]approximate:  Taking taylor expansion of (/ 1 (* (- (acos (/ 1 a))) (/ 1 (/ 1 a)))) in (a) around 0
* [misc]taylor:  Taking taylor expansion of (/ 1 (* (- (acos (/ 1 a))) (/ 1 (/ 1 a)))) in a
* [misc]taylor:  Taking taylor expansion of (* (- (acos (/ 1 a))) (/ 1 (/ 1 a))) in a
* [misc]taylor:  Taking taylor expansion of (- (acos (/ 1 a))) in a
* [misc]taylor:  Taking taylor expansion of (acos (/ 1 a)) in a
* [misc]backup-simplify:  Simplify (acos (/ 1 a)) into (acos (/ 1 a))
* [misc]taylor:  Taking taylor expansion of (/ 1 (/ 1 a)) in a
* [misc]taylor:  Taking taylor expansion of (/ 1 a) in a
* [misc]taylor:  Taking taylor expansion of a in a
* [misc]backup-simplify:  Simplify 0 into 0
* [misc]backup-simplify:  Simplify 1 into 1
* [misc]backup-simplify:  Simplify (/ 1 1) into 1
* [misc]backup-simplify:  Simplify (/ 1 1) into 1
* [misc]backup-simplify:  Simplify (- (acos (/ 1 a))) into (- (acos (/ 1 a)))
* [misc]backup-simplify:  Simplify (* (- (acos (/ 1 a))) 1) into (* -1 (acos (/ 1 a)))
* [misc]backup-simplify:  Simplify (/ 1 (* -1 (acos (/ 1 a)))) into (/ -1 (acos (/ 1 a)))
* [misc]taylor:  Taking taylor expansion of (/ 1 (* (- (acos (/ 1 a))) (/ 1 (/ 1 a)))) in a
* [misc]taylor:  Taking taylor expansion of (* (- (acos (/ 1 a))) (/ 1 (/ 1 a))) in a
* [misc]taylor:  Taking taylor expansion of (- (acos (/ 1 a))) in a
* [misc]taylor:  Taking taylor expansion of (acos (/ 1 a)) in a
* [misc]backup-simplify:  Simplify (acos (/ 1 a)) into (acos (/ 1 a))
* [misc]taylor:  Taking taylor expansion of (/ 1 (/ 1 a)) in a
* [misc]taylor:  Taking taylor expansion of (/ 1 a) in a
* [misc]taylor:  Taking taylor expansion of a in a
* [misc]backup-simplify:  Simplify 0 into 0
* [misc]backup-simplify:  Simplify 1 into 1
* [misc]backup-simplify:  Simplify (/ 1 1) into 1
* [misc]backup-simplify:  Simplify (/ 1 1) into 1
* [misc]backup-simplify:  Simplify (- (acos (/ 1 a))) into (- (acos (/ 1 a)))
* [misc]backup-simplify:  Simplify (* (- (acos (/ 1 a))) 1) into (* -1 (acos (/ 1 a)))
* [misc]backup-simplify:  Simplify (/ 1 (* -1 (acos (/ 1 a)))) into (/ -1 (acos (/ 1 a)))
* [misc]backup-simplify:  Simplify (/ -1 (acos (/ 1 a))) into (/ -1 (acos (/ 1 a)))
* [misc]backup-simplify:  Simplify (- (acos (/ 1 a))) into (- (acos (/ 1 a)))
* [misc]backup-simplify:  Simplify (- (+ (* 1 (/ 0 1)))) into 0
* [misc]backup-simplify:  Simplify (- (+ (* 1 (/ 0 1)))) into 0
* [misc]backup-simplify:  Simplify (- 0) into 0
* [misc]backup-simplify:  Simplify (+ (* (- (acos (/ 1 a))) 0) (* 0 1)) into 0
* [misc]backup-simplify:  Simplify (- (+ (* (/ -1 (acos (/ 1 a))) (/ 0 (* -1 (acos (/ 1 a))))))) into 0
* [misc]backup-simplify:  Simplify 0 into 0
* [misc]backup-simplify:  Simplify (- (acos (/ 1 a))) into (- (acos (/ 1 a)))
* [misc]backup-simplify:  Simplify (- (+ (* 1 (/ 0 1)) (* 0 (/ 0 1)))) into 0
* [misc]backup-simplify:  Simplify (- (+ (* 1 (/ 0 1)) (* 0 (/ 0 1)))) into 0
* [misc]backup-simplify:  Simplify (- 0) into 0
* [misc]backup-simplify:  Simplify (- 0) into 0
* [misc]backup-simplify:  Simplify (+ (* (- (acos (/ 1 a))) 0) (+ (* 0 0) (* 0 1))) into 0
* [misc]backup-simplify:  Simplify (- (+ (* (/ -1 (acos (/ 1 a))) (/ 0 (* -1 (acos (/ 1 a))))) (* 0 (/ 0 (* -1 (acos (/ 1 a))))))) into 0
* [misc]backup-simplify:  Simplify 0 into 0
* [misc]backup-simplify:  Simplify (- (acos (/ 1 a))) into (- (acos (/ 1 a)))
* [misc]backup-simplify:  Simplify (- (+ (* 1 (/ 0 1)) (* 0 (/ 0 1)) (* 0 (/ 0 1)))) into 0
* [misc]backup-simplify:  Simplify (- (+ (* 1 (/ 0 1)) (* 0 (/ 0 1)) (* 0 (/ 0 1)))) 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 a))) 0) (+ (* 0 0) (+ (* 0 0) (* 0 1)))) into 0
* [misc]backup-simplify:  Simplify (- (+ (* (/ -1 (acos (/ 1 a))) (/ 0 (* -1 (acos (/ 1 a))))) (* 0 (/ 0 (* -1 (acos (/ 1 a))))) (* 0 (/ 0 (* -1 (acos (/ 1 a))))))) into 0
* [misc]backup-simplify:  Simplify 0 into 0
* [misc]backup-simplify:  Simplify (- (acos (/ 1 a))) into (- (acos (/ 1 a)))
* [misc]backup-simplify:  Simplify (- (+ (* 1 (/ 0 1)) (* 0 (/ 0 1)) (* 0 (/ 0 1)) (* 0 (/ 0 1)))) into 0
* [misc]backup-simplify:  Simplify (- (+ (* 1 (/ 0 1)) (* 0 (/ 0 1)) (* 0 (/ 0 1)) (* 0 (/ 0 1)))) 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 a))) 0) (+ (* 0 0) (+ (* 0 0) (+ (* 0 0) (* 0 1))))) into 0
* [misc]backup-simplify:  Simplify (- (+ (* (/ -1 (acos (/ 1 a))) (/ 0 (* -1 (acos (/ 1 a))))) (* 0 (/ 0 (* -1 (acos (/ 1 a))))) (* 0 (/ 0 (* -1 (acos (/ 1 a))))) (* 0 (/ 0 (* -1 (acos (/ 1 a))))))) into 0
* [misc]backup-simplify:  Simplify 0 into 0
* [misc]backup-simplify:  Simplify (- (acos (/ 1 a))) into (- (acos (/ 1 a)))
* [misc]backup-simplify:  Simplify (- (+ (* 1 (/ 0 1)) (* 0 (/ 0 1)) (* 0 (/ 0 1)) (* 0 (/ 0 1)) (* 0 (/ 0 1)))) into 0
* [misc]backup-simplify:  Simplify (- (+ (* 1 (/ 0 1)) (* 0 (/ 0 1)) (* 0 (/ 0 1)) (* 0 (/ 0 1)) (* 0 (/ 0 1)))) 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 a))) 0) (+ (* 0 0) (+ (* 0 0) (+ (* 0 0) (+ (* 0 0) (* 0 1)))))) into 0
* [misc]backup-simplify:  Simplify (- (+ (* (/ -1 (acos (/ 1 a))) (/ 0 (* -1 (acos (/ 1 a))))) (* 0 (/ 0 (* -1 (acos (/ 1 a))))) (* 0 (/ 0 (* -1 (acos (/ 1 a))))) (* 0 (/ 0 (* -1 (acos (/ 1 a))))) (* 0 (/ 0 (* -1 (acos (/ 1 a))))))) into 0
* [misc]backup-simplify:  Simplify 0 into 0
* [misc]backup-simplify:  Simplify (- (acos (/ 1 a))) into (- (acos (/ 1 a)))
* [misc]backup-simplify:  Simplify (- (+ (* 1 (/ 0 1)) (* 0 (/ 0 1)) (* 0 (/ 0 1)) (* 0 (/ 0 1)) (* 0 (/ 0 1)) (* 0 (/ 0 1)))) into 0
* [misc]backup-simplify:  Simplify (- (+ (* 1 (/ 0 1)) (* 0 (/ 0 1)) (* 0 (/ 0 1)) (* 0 (/ 0 1)) (* 0 (/ 0 1)) (* 0 (/ 0 1)))) 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 (- 0) into 0
* [misc]backup-simplify:  Simplify (+ (* (- (acos (/ 1 a))) 0) (+ (* 0 0) (+ (* 0 0) (+ (* 0 0) (+ (* 0 0) (+ (* 0 0) (* 0 1))))))) into 0
* [misc]backup-simplify:  Simplify (- (+ (* (/ -1 (acos (/ 1 a))) (/ 0 (* -1 (acos (/ 1 a))))) (* 0 (/ 0 (* -1 (acos (/ 1 a))))) (* 0 (/ 0 (* -1 (acos (/ 1 a))))) (* 0 (/ 0 (* -1 (acos (/ 1 a))))) (* 0 (/ 0 (* -1 (acos (/ 1 a))))) (* 0 (/ 0 (* -1 (acos (/ 1 a))))))) into 0
* [misc]backup-simplify:  Simplify 0 into 0
* [misc]backup-simplify:  Simplify (* (/ -1 (acos (/ 1 (/ 1 a)))) (/ 1 (/ 1 a))) into (* -1 (/ a (acos a)))
* [misc]approximate:  Taking taylor expansion of (/ 1 (* (- (acos (/ 1 (- a)))) (/ 1 (/ 1 (- a))))) in (a) around 0
* [misc]taylor:  Taking taylor expansion of (/ 1 (* (- (acos (/ 1 (- a)))) (/ 1 (/ 1 (- a))))) in a
* [misc]taylor:  Taking taylor expansion of (* (- (acos (/ 1 (- a)))) (/ 1 (/ 1 (- a)))) in a
* [misc]taylor:  Taking taylor expansion of (- (acos (/ 1 (- a)))) in a
* [misc]taylor:  Taking taylor expansion of (acos (/ 1 (- a))) in a
* [misc]backup-simplify:  Simplify (acos (/ 1 (- a))) into (acos (/ -1 a))
* [misc]taylor:  Taking taylor expansion of (/ 1 (/ 1 (- a))) in a
* [misc]taylor:  Taking taylor expansion of (/ 1 (- a)) in a
* [misc]taylor:  Taking taylor expansion of (- a) in a
* [misc]taylor:  Taking taylor expansion of a in a
* [misc]backup-simplify:  Simplify 0 into 0
* [misc]backup-simplify:  Simplify 1 into 1
* [misc]backup-simplify:  Simplify (- 0) into 0
* [misc]backup-simplify:  Simplify (- 1) into -1
* [misc]backup-simplify:  Simplify (- 1) into -1
* [misc]backup-simplify:  Simplify (/ 1 -1) into -1
* [misc]backup-simplify:  Simplify (/ 1 -1) into -1
* [misc]backup-simplify:  Simplify (- (acos (/ -1 a))) into (- (acos (/ -1 a)))
* [misc]backup-simplify:  Simplify (* (- (acos (/ -1 a))) -1) into (acos (/ -1 a))
* [misc]backup-simplify:  Simplify (/ 1 (acos (/ -1 a))) into (/ 1 (acos (/ -1 a)))
* [misc]taylor:  Taking taylor expansion of (/ 1 (* (- (acos (/ 1 (- a)))) (/ 1 (/ 1 (- a))))) in a
* [misc]taylor:  Taking taylor expansion of (* (- (acos (/ 1 (- a)))) (/ 1 (/ 1 (- a)))) in a
* [misc]taylor:  Taking taylor expansion of (- (acos (/ 1 (- a)))) in a
* [misc]taylor:  Taking taylor expansion of (acos (/ 1 (- a))) in a
* [misc]backup-simplify:  Simplify (acos (/ 1 (- a))) into (acos (/ -1 a))
* [misc]taylor:  Taking taylor expansion of (/ 1 (/ 1 (- a))) in a
* [misc]taylor:  Taking taylor expansion of (/ 1 (- a)) in a
* [misc]taylor:  Taking taylor expansion of (- a) in a
* [misc]taylor:  Taking taylor expansion of a in a
* [misc]backup-simplify:  Simplify 0 into 0
* [misc]backup-simplify:  Simplify 1 into 1
* [misc]backup-simplify:  Simplify (- 0) into 0
* [misc]backup-simplify:  Simplify (- 1) into -1
* [misc]backup-simplify:  Simplify (- 1) into -1
* [misc]backup-simplify:  Simplify (/ 1 -1) into -1
* [misc]backup-simplify:  Simplify (/ 1 -1) into -1
* [misc]backup-simplify:  Simplify (- (acos (/ -1 a))) into (- (acos (/ -1 a)))
* [misc]backup-simplify:  Simplify (* (- (acos (/ -1 a))) -1) into (acos (/ -1 a))
* [misc]backup-simplify:  Simplify (/ 1 (acos (/ -1 a))) into (/ 1 (acos (/ -1 a)))
* [misc]backup-simplify:  Simplify (/ 1 (acos (/ -1 a))) into (/ 1 (acos (/ -1 a)))
* [misc]backup-simplify:  Simplify (- (acos (/ -1 a))) into (- (acos (/ -1 a)))
* [misc]backup-simplify:  Simplify (- 0) into 0
* [misc]backup-simplify:  Simplify (- 1) into -1
* [misc]backup-simplify:  Simplify (- (+ (* -1 (/ 0 -1)))) into 0
* [misc]backup-simplify:  Simplify (- (+ (* -1 (/ 0 -1)))) into 0
* [misc]backup-simplify:  Simplify (- 0) into 0
* [misc]backup-simplify:  Simplify (+ (* (- (acos (/ -1 a))) 0) (* 0 -1)) into 0
* [misc]backup-simplify:  Simplify (- (+ (* (/ 1 (acos (/ -1 a))) (/ 0 (acos (/ -1 a)))))) into 0
* [misc]backup-simplify:  Simplify 0 into 0
* [misc]backup-simplify:  Simplify (- (acos (/ -1 a))) into (- (acos (/ -1 a)))
* [misc]backup-simplify:  Simplify (- 0) into 0
* [misc]backup-simplify:  Simplify (- 1) into -1
* [misc]backup-simplify:  Simplify (- 0) into 0
* [misc]backup-simplify:  Simplify (- 1) into -1
* [misc]backup-simplify:  Simplify (- (+ (* -1 (/ 0 -1)) (* 0 (/ 0 -1)))) into 0
* [misc]backup-simplify:  Simplify (- (+ (* -1 (/ 0 -1)) (* 0 (/ 0 -1)))) into 0
* [misc]backup-simplify:  Simplify (- 0) into 0
* [misc]backup-simplify:  Simplify (- 0) into 0
* [misc]backup-simplify:  Simplify (+ (* (- (acos (/ -1 a))) 0) (+ (* 0 0) (* 0 -1))) into 0
* [misc]backup-simplify:  Simplify (- (+ (* (/ 1 (acos (/ -1 a))) (/ 0 (acos (/ -1 a)))) (* 0 (/ 0 (acos (/ -1 a)))))) into 0
* [misc]backup-simplify:  Simplify 0 into 0
* [misc]backup-simplify:  Simplify (- (acos (/ -1 a))) into (- (acos (/ -1 a)))
* [misc]backup-simplify:  Simplify (- 0) into 0
* [misc]backup-simplify:  Simplify (- 1) into -1
* [misc]backup-simplify:  Simplify (- 0) into 0
* [misc]backup-simplify:  Simplify (- 1) into -1
* [misc]backup-simplify:  Simplify (- 0) into 0
* [misc]backup-simplify:  Simplify (- 1) into -1
* [misc]backup-simplify:  Simplify (- (+ (* -1 (/ 0 -1)) (* 0 (/ 0 -1)) (* 0 (/ 0 -1)))) into 0
* [misc]backup-simplify:  Simplify (- (+ (* -1 (/ 0 -1)) (* 0 (/ 0 -1)) (* 0 (/ 0 -1)))) 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 a))) 0) (+ (* 0 0) (+ (* 0 0) (* 0 -1)))) into 0
* [misc]backup-simplify:  Simplify (- (+ (* (/ 1 (acos (/ -1 a))) (/ 0 (acos (/ -1 a)))) (* 0 (/ 0 (acos (/ -1 a)))) (* 0 (/ 0 (acos (/ -1 a)))))) into 0
* [misc]backup-simplify:  Simplify 0 into 0
* [misc]backup-simplify:  Simplify (- (acos (/ -1 a))) into (- (acos (/ -1 a)))
* [misc]backup-simplify:  Simplify (- 0) into 0
* [misc]backup-simplify:  Simplify (- 1) into -1
* [misc]backup-simplify:  Simplify (- 0) into 0
* [misc]backup-simplify:  Simplify (- 1) into -1
* [misc]backup-simplify:  Simplify (- 0) into 0
* [misc]backup-simplify:  Simplify (- 1) into -1
* [misc]backup-simplify:  Simplify (- 0) into 0
* [misc]backup-simplify:  Simplify (- 1) into -1
* [misc]backup-simplify:  Simplify (- (+ (* -1 (/ 0 -1)) (* 0 (/ 0 -1)) (* 0 (/ 0 -1)) (* 0 (/ 0 -1)))) into 0
* [misc]backup-simplify:  Simplify (- (+ (* -1 (/ 0 -1)) (* 0 (/ 0 -1)) (* 0 (/ 0 -1)) (* 0 (/ 0 -1)))) 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 a))) 0) (+ (* 0 0) (+ (* 0 0) (+ (* 0 0) (* 0 -1))))) into 0
* [misc]backup-simplify:  Simplify (- (+ (* (/ 1 (acos (/ -1 a))) (/ 0 (acos (/ -1 a)))) (* 0 (/ 0 (acos (/ -1 a)))) (* 0 (/ 0 (acos (/ -1 a)))) (* 0 (/ 0 (acos (/ -1 a)))))) into 0
* [misc]backup-simplify:  Simplify 0 into 0
* [misc]backup-simplify:  Simplify (- (acos (/ -1 a))) into (- (acos (/ -1 a)))
* [misc]backup-simplify:  Simplify (- 0) into 0
* [misc]backup-simplify:  Simplify (- 1) into -1
* [misc]backup-simplify:  Simplify (- 0) into 0
* [misc]backup-simplify:  Simplify (- 1) into -1
* [misc]backup-simplify:  Simplify (- 0) into 0
* [misc]backup-simplify:  Simplify (- 1) into -1
* [misc]backup-simplify:  Simplify (- 0) into 0
* [misc]backup-simplify:  Simplify (- 1) into -1
* [misc]backup-simplify:  Simplify (- 0) into 0
* [misc]backup-simplify:  Simplify (- 1) into -1
* [misc]backup-simplify:  Simplify (- (+ (* -1 (/ 0 -1)) (* 0 (/ 0 -1)) (* 0 (/ 0 -1)) (* 0 (/ 0 -1)) (* 0 (/ 0 -1)))) into 0
* [misc]backup-simplify:  Simplify (- (+ (* -1 (/ 0 -1)) (* 0 (/ 0 -1)) (* 0 (/ 0 -1)) (* 0 (/ 0 -1)) (* 0 (/ 0 -1)))) 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 a))) 0) (+ (* 0 0) (+ (* 0 0) (+ (* 0 0) (+ (* 0 0) (* 0 -1)))))) into 0
* [misc]backup-simplify:  Simplify (- (+ (* (/ 1 (acos (/ -1 a))) (/ 0 (acos (/ -1 a)))) (* 0 (/ 0 (acos (/ -1 a)))) (* 0 (/ 0 (acos (/ -1 a)))) (* 0 (/ 0 (acos (/ -1 a)))) (* 0 (/ 0 (acos (/ -1 a)))))) into 0
* [misc]backup-simplify:  Simplify 0 into 0
* [misc]backup-simplify:  Simplify (- (acos (/ -1 a))) into (- (acos (/ -1 a)))
* [misc]backup-simplify:  Simplify (- 0) into 0
* [misc]backup-simplify:  Simplify (- 1) into -1
* [misc]backup-simplify:  Simplify (- 0) into 0
* [misc]backup-simplify:  Simplify (- 1) into -1
* [misc]backup-simplify:  Simplify (- 0) into 0
* [misc]backup-simplify:  Simplify (- 1) into -1
* [misc]backup-simplify:  Simplify (- 0) into 0
* [misc]backup-simplify:  Simplify (- 1) into -1
* [misc]backup-simplify:  Simplify (- 0) into 0
* [misc]backup-simplify:  Simplify (- 1) into -1
* [misc]backup-simplify:  Simplify (- 0) into 0
* [misc]backup-simplify:  Simplify (- 1) into -1
* [misc]backup-simplify:  Simplify (- (+ (* -1 (/ 0 -1)) (* 0 (/ 0 -1)) (* 0 (/ 0 -1)) (* 0 (/ 0 -1)) (* 0 (/ 0 -1)) (* 0 (/ 0 -1)))) into 0
* [misc]backup-simplify:  Simplify (- (+ (* -1 (/ 0 -1)) (* 0 (/ 0 -1)) (* 0 (/ 0 -1)) (* 0 (/ 0 -1)) (* 0 (/ 0 -1)) (* 0 (/ 0 -1)))) 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 (- 0) into 0
* [misc]backup-simplify:  Simplify (+ (* (- (acos (/ -1 a))) 0) (+ (* 0 0) (+ (* 0 0) (+ (* 0 0) (+ (* 0 0) (+ (* 0 0) (* 0 -1))))))) into 0
* [misc]backup-simplify:  Simplify (- (+ (* (/ 1 (acos (/ -1 a))) (/ 0 (acos (/ -1 a)))) (* 0 (/ 0 (acos (/ -1 a)))) (* 0 (/ 0 (acos (/ -1 a)))) (* 0 (/ 0 (acos (/ -1 a)))) (* 0 (/ 0 (acos (/ -1 a)))) (* 0 (/ 0 (acos (/ -1 a)))))) into 0
* [misc]backup-simplify:  Simplify 0 into 0
* [misc]backup-simplify:  Simplify (* (/ 1 (acos (/ -1 (/ 1 (- a))))) (/ 1 (/ 1 (- a)))) into (* -1 (/ a (acos a)))
* * * [misc]progress:  simplifying candidates
* * * * [misc]progress:  [ 1 / 56 ] simplifiying candidate #<alt (λ (a) (/ 1 (log1p (expm1 (* (- (acos a)) (/ 1 a))))))>
* * * * [misc]progress:  [ 2 / 56 ] simplifiying candidate #<alt (λ (a) (/ 1 (expm1 (log1p (* (- (acos a)) (/ 1 a))))))>
* * * * [misc]progress:  [ 3 / 56 ] simplifiying candidate #<alt (λ (a) (/ 1 (pow (* (- (acos a)) (/ 1 a)) 1)))>
* [enter]simplify:  Simplifying (* (- (acos a)) (/ 1 a))
* * [misc]simplify:  iters left: 5 (6 enodes)
* * [misc]simplify:  iters left: 4 (13 enodes)
* * [misc]simplify:  iters left: 3 (23 enodes)
* * [misc]simplify:  iters left: 2 (47 enodes)
* * [misc]simplify:  iters left: 1 (71 enodes)
* [exit]simplify:  Simplified to (- (/ (acos a) a))
* [misc]simplify:  Simplified (2 2 1) to (λ (a) (/ 1 (pow (- (/ (acos a) a)) 1)))
* * * * [misc]progress:  [ 4 / 56 ] simplifiying candidate #<alt (λ (a) (/ 1 (pow (* (- (acos a)) (/ 1 a)) 1)))>
* * * * [misc]progress:  [ 5 / 56 ] simplifiying candidate #<alt (λ (a) (/ 1 (exp (+ (log (- (acos a))) (log (/ 1 a))))))>
* [enter]simplify:  Simplifying (+ (log (- (acos a))) (log (/ 1 a)))
* * [misc]simplify:  iters left: 6 (8 enodes)
* * [misc]simplify:  iters left: 5 (15 enodes)
* * [misc]simplify:  iters left: 4 (21 enodes)
* * [misc]simplify:  iters left: 3 (32 enodes)
* * [misc]simplify:  iters left: 2 (66 enodes)
* * [misc]simplify:  iters left: 1 (252 enodes)
* [exit]simplify:  Simplified to (- (log (- (acos a))) (log a))
* [misc]simplify:  Simplified (2 2 1) to (λ (a) (/ 1 (exp (- (log (- (acos a))) (log a)))))
* * * * [misc]progress:  [ 6 / 56 ] simplifiying candidate #<alt (λ (a) (/ 1 (exp (log (* (- (acos a)) (/ 1 a))))))>
* * * * [misc]progress:  [ 7 / 56 ] simplifiying candidate #<alt (λ (a) (/ 1 (log (exp (* (- (acos a)) (/ 1 a))))))>
* * * * [misc]progress:  [ 8 / 56 ] simplifiying candidate #<alt (λ (a) (/ 1 (cbrt (* (* (* (- (acos a)) (- (acos a))) (- (acos a))) (* (* (/ 1 a) (/ 1 a)) (/ 1 a))))))>
* [enter]simplify:  Simplifying (* (* (* (- (acos a)) (- (acos a))) (- (acos a))) (* (* (/ 1 a) (/ 1 a)) (/ 1 a)))
* * [misc]simplify:  iters left: 6 (10 enodes)
* * [misc]simplify:  iters left: 5 (32 enodes)
* * [misc]simplify:  iters left: 4 (106 enodes)
* * [misc]simplify:  iters left: 3 (356 enodes)
* [exit]simplify:  Simplified to (/ (/ (- (acos a)) a) (/ (* a a) (* (acos a) (acos a))))
* [misc]simplify:  Simplified (2 2 1) to (λ (a) (/ 1 (cbrt (/ (/ (- (acos a)) a) (/ (* a a) (* (acos a) (acos a)))))))
* * * * [misc]progress:  [ 9 / 56 ] simplifiying candidate #<alt (λ (a) (/ 1 (* (* (cbrt (* (- (acos a)) (/ 1 a))) (cbrt (* (- (acos a)) (/ 1 a)))) (cbrt (* (- (acos a)) (/ 1 a))))))>
* * * * [misc]progress:  [ 10 / 56 ] simplifiying candidate #<alt (λ (a) (/ 1 (cbrt (* (* (* (- (acos a)) (/ 1 a)) (* (- (acos a)) (/ 1 a))) (* (- (acos a)) (/ 1 a))))))>
* * * * [misc]progress:  [ 11 / 56 ] simplifiying candidate #<alt (λ (a) (/ 1 (* (sqrt (* (- (acos a)) (/ 1 a))) (sqrt (* (- (acos a)) (/ 1 a))))))>
* * * * [misc]progress:  [ 12 / 56 ] simplifiying candidate #<alt (λ (a) (/ 1 (* 1 (* (- (acos a)) (/ 1 a)))))>
* * * * [misc]progress:  [ 13 / 56 ] simplifiying candidate #<alt (λ (a) (/ 1 (/ (- (acos a)) a)))>
* * * * [misc]progress:  [ 14 / 56 ] simplifiying candidate #<alt (λ (a) (/ 1 (- (* (acos a) (/ 1 a)))))>
* [enter]simplify:  Simplifying (* (acos a) (/ 1 a))
* * [misc]simplify:  iters left: 4 (5 enodes)
* * [misc]simplify:  iters left: 3 (10 enodes)
* * [misc]simplify:  iters left: 2 (17 enodes)
* * [misc]simplify:  iters left: 1 (22 enodes)
* [exit]simplify:  Simplified to (/ (acos a) a)
* [misc]simplify:  Simplified (2 2 1) to (λ (a) (/ 1 (- (/ (acos a) a))))
* * * * [misc]progress:  [ 15 / 56 ] simplifiying candidate #<alt (λ (a) (/ 1 (* (* (- (acos a)) (* (cbrt (/ 1 a)) (cbrt (/ 1 a)))) (cbrt (/ 1 a)))))>
* [enter]simplify:  Simplifying (cbrt (/ 1 a))
* * [misc]simplify:  iters left: 3 (4 enodes)
* * [misc]simplify:  iters left: 2 (6 enodes)
* [exit]simplify:  Simplified to (cbrt (/ 1 a))
* [misc]simplify:  Simplified (2 2 2) to (λ (a) (/ 1 (* (* (- (acos a)) (* (cbrt (/ 1 a)) (cbrt (/ 1 a)))) (cbrt (/ 1 a)))))
* * * * [misc]progress:  [ 16 / 56 ] simplifiying candidate #<alt (λ (a) (/ 1 (* (* (- (acos a)) (sqrt (/ 1 a))) (sqrt (/ 1 a)))))>
* [enter]simplify:  Simplifying (sqrt (/ 1 a))
* * [misc]simplify:  iters left: 3 (4 enodes)
* * [misc]simplify:  iters left: 2 (6 enodes)
* [exit]simplify:  Simplified to (sqrt (/ 1 a))
* [misc]simplify:  Simplified (2 2 2) to (λ (a) (/ 1 (* (* (- (acos a)) (sqrt (/ 1 a))) (sqrt (/ 1 a)))))
* * * * [misc]progress:  [ 17 / 56 ] simplifiying candidate #<alt (λ (a) (/ 1 (* (* (- (acos a)) 1) (/ 1 a))))>
* [enter]simplify:  Simplifying (/ 1 a)
* * [misc]simplify:  iters left: 2 (3 enodes)
* * [misc]simplify:  iters left: 1 (5 enodes)
* [exit]simplify:  Simplified to (/ 1 a)
* [misc]simplify:  Simplified (2 2 2) to (λ (a) (/ 1 (* (* (- (acos a)) 1) (/ 1 a))))
* * * * [misc]progress:  [ 18 / 56 ] simplifiying candidate #<alt (λ (a) (/ 1 (* (* (- (acos a)) 1) (/ 1 a))))>
* [enter]simplify:  Simplifying (/ 1 a)
* * [misc]simplify:  iters left: 2 (3 enodes)
* * [misc]simplify:  iters left: 1 (5 enodes)
* [exit]simplify:  Simplified to (/ 1 a)
* [misc]simplify:  Simplified (2 2 2) to (λ (a) (/ 1 (* (* (- (acos a)) 1) (/ 1 a))))
* * * * [misc]progress:  [ 19 / 56 ] simplifiying candidate #<alt (λ (a) (/ 1 (* (* (cbrt (- (acos a))) (cbrt (- (acos a)))) (* (cbrt (- (acos a))) (/ 1 a)))))>
* [enter]simplify:  Simplifying (* (cbrt (- (acos a))) (cbrt (- (acos a))))
* * [misc]simplify:  iters left: 6 (5 enodes)
* [exit]simplify:  Simplified to (* (cbrt (- (acos a))) (cbrt (- (acos a))))
* [misc]simplify:  Simplified (2 2 1) to (λ (a) (/ 1 (* (* (cbrt (- (acos a))) (cbrt (- (acos a)))) (* (cbrt (- (acos a))) (/ 1 a)))))
* * * * [misc]progress:  [ 20 / 56 ] simplifiying candidate #<alt (λ (a) (/ 1 (* (sqrt (- (acos a))) (* (sqrt (- (acos a))) (/ 1 a)))))>
* [enter]simplify:  Simplifying (sqrt (- (acos a)))
* * [misc]simplify:  iters left: 4 (4 enodes)
* [exit]simplify:  Simplified to (sqrt (- (acos a)))
* [misc]simplify:  Simplified (2 2 1) to (λ (a) (/ 1 (* (sqrt (- (acos a))) (* (sqrt (- (acos a))) (/ 1 a)))))
* * * * [misc]progress:  [ 21 / 56 ] simplifiying candidate #<alt (λ (a) (/ 1 (* 1 (* (- (acos a)) (/ 1 a)))))>
* * * * [misc]progress:  [ 22 / 56 ] simplifiying candidate #<alt (λ (a) (/ 1 (* -1 (* (acos a) (/ 1 a)))))>
* * * * [misc]progress:  [ 23 / 56 ] simplifiying candidate #<alt (λ (a) (/ 1 (* (- (* (cbrt (acos a)) (cbrt (acos a)))) (* (cbrt (acos a)) (/ 1 a)))))>
* [enter]simplify:  Simplifying (- (* (cbrt (acos a)) (cbrt (acos a))))
* * [misc]simplify:  iters left: 6 (5 enodes)
* * [misc]simplify:  iters left: 5 (8 enodes)
* [exit]simplify:  Simplified to (* (cbrt (acos a)) (- (cbrt (acos a))))
* [misc]simplify:  Simplified (2 2 1) to (λ (a) (/ 1 (* (* (cbrt (acos a)) (- (cbrt (acos a)))) (* (cbrt (acos a)) (/ 1 a)))))
* * * * [misc]progress:  [ 24 / 56 ] simplifiying candidate #<alt (λ (a) (/ 1 (* (- (sqrt (acos a))) (* (sqrt (acos a)) (/ 1 a)))))>
* [enter]simplify:  Simplifying (- (sqrt (acos a)))
* * [misc]simplify:  iters left: 4 (4 enodes)
* [exit]simplify:  Simplified to (- (sqrt (acos a)))
* [misc]simplify:  Simplified (2 2 1) to (λ (a) (/ 1 (* (- (sqrt (acos a))) (* (sqrt (acos a)) (/ 1 a)))))
* * * * [misc]progress:  [ 25 / 56 ] simplifiying candidate #<alt (λ (a) (/ 1 (* (- 1) (* (acos a) (/ 1 a)))))>
* [enter]simplify:  Simplifying (- 1)
* * [misc]simplify:  iters left: 2 (2 enodes)
* * [misc]simplify:  iters left: 1 (4 enodes)
* [exit]simplify:  Simplified to (- 1)
* [misc]simplify:  Simplified (2 2 1) to (λ (a) (/ 1 (* (- 1) (* (acos a) (/ 1 a)))))
* * * * [misc]progress:  [ 26 / 56 ] simplifiying candidate #<alt (λ (a) (/ 1 (* (* (cbrt (acos a)) (cbrt (acos a))) (* (- (cbrt (acos a))) (/ 1 a)))))>
* [enter]simplify:  Simplifying (* (cbrt (acos a)) (cbrt (acos a)))
* * [misc]simplify:  iters left: 4 (4 enodes)
* [exit]simplify:  Simplified to (* (cbrt (acos a)) (cbrt (acos a)))
* [misc]simplify:  Simplified (2 2 1) to (λ (a) (/ 1 (* (* (cbrt (acos a)) (cbrt (acos a))) (* (- (cbrt (acos a))) (/ 1 a)))))
* * * * [misc]progress:  [ 27 / 56 ] simplifiying candidate #<alt (λ (a) (/ 1 (* (sqrt (acos a)) (* (- (sqrt (acos a))) (/ 1 a)))))>
* [enter]simplify:  Simplifying (sqrt (acos a))
* * [misc]simplify:  iters left: 2 (3 enodes)
* [exit]simplify:  Simplified to (sqrt (acos a))
* [misc]simplify:  Simplified (2 2 1) to (λ (a) (/ 1 (* (sqrt (acos a)) (* (- (sqrt (acos a))) (/ 1 a)))))
* * * * [misc]progress:  [ 28 / 56 ] simplifiying candidate #<alt (λ (a) (/ 1 (* 1 (* (- (acos a)) (/ 1 a)))))>
* * * * [misc]progress:  [ 29 / 56 ] simplifiying candidate #<alt (λ (a) (/ 1 (/ (* (- (acos a)) 1) a)))>
* * * * [misc]progress:  [ 30 / 56 ] simplifiying candidate #<alt (λ (a) (/ 1 (* (/ 1 a) (- (acos a)))))>
* * * * [misc]progress:  [ 31 / 56 ] simplifiying candidate #<alt (λ (a) (log1p (expm1 (/ 1 (* (- (acos a)) (/ 1 a))))))>
* * * * [misc]progress:  [ 32 / 56 ] simplifiying candidate #<alt (λ (a) (expm1 (log1p (/ 1 (* (- (acos a)) (/ 1 a))))))>
* * * * [misc]progress:  [ 33 / 56 ] simplifiying candidate #<alt (λ (a) (pow (* (- (acos a)) (/ 1 a)) -1))>
* * * * [misc]progress:  [ 34 / 56 ] simplifiying candidate #<alt (λ (a) (pow (* (- (acos a)) (/ 1 a)) (- 1)))>
* [enter]simplify:  Simplifying (- 1)
* * [misc]simplify:  iters left: 2 (2 enodes)
* * [misc]simplify:  iters left: 1 (4 enodes)
* [exit]simplify:  Simplified to (- 1)
* [misc]simplify:  Simplified (2 2) to (λ (a) (pow (* (- (acos a)) (/ 1 a)) (- 1)))
* * * * [misc]progress:  [ 35 / 56 ] simplifiying candidate #<alt (λ (a) (pow (* (- (acos a)) (/ 1 a)) (- 1)))>
* [enter]simplify:  Simplifying (- 1)
* * [misc]simplify:  iters left: 2 (2 enodes)
* * [misc]simplify:  iters left: 1 (4 enodes)
* [exit]simplify:  Simplified to (- 1)
* [misc]simplify:  Simplified (2 2) to (λ (a) (pow (* (- (acos a)) (/ 1 a)) (- 1)))
* * * * [misc]progress:  [ 36 / 56 ] simplifiying candidate #<alt (λ (a) (pow (/ 1 (* (- (acos a)) (/ 1 a))) 1))>
* * * * [misc]progress:  [ 37 / 56 ] simplifiying candidate #<alt (λ (a) (exp (- (+ (log (- (acos a))) (log (/ 1 a))))))>
* * * * [misc]progress:  [ 38 / 56 ] simplifiying candidate #<alt (λ (a) (exp (- (log (* (- (acos a)) (/ 1 a))))))>
* * * * [misc]progress:  [ 39 / 56 ] simplifiying candidate #<alt (λ (a) (exp (log (/ 1 (* (- (acos a)) (/ 1 a))))))>
* * * * [misc]progress:  [ 40 / 56 ] simplifiying candidate #<alt (λ (a) (log (exp (/ 1 (* (- (acos a)) (/ 1 a))))))>
* * * * [misc]progress:  [ 41 / 56 ] simplifiying candidate #<alt (λ (a) (* (* (cbrt (/ 1 (* (- (acos a)) (/ 1 a)))) (cbrt (/ 1 (* (- (acos a)) (/ 1 a))))) (cbrt (/ 1 (* (- (acos a)) (/ 1 a))))))>
* * * * [misc]progress:  [ 42 / 56 ] simplifiying candidate #<alt (λ (a) (cbrt (* (* (/ 1 (* (- (acos a)) (/ 1 a))) (/ 1 (* (- (acos a)) (/ 1 a)))) (/ 1 (* (- (acos a)) (/ 1 a))))))>
* * * * [misc]progress:  [ 43 / 56 ] simplifiying candidate #<alt (λ (a) (* (sqrt (/ 1 (* (- (acos a)) (/ 1 a)))) (sqrt (/ 1 (* (- (acos a)) (/ 1 a))))))>
* * * * [misc]progress:  [ 44 / 56 ] simplifiying candidate #<alt (λ (a) (/ (- 1) (- (* (- (acos a)) (/ 1 a)))))>
* * * * [misc]progress:  [ 45 / 56 ] simplifiying candidate #<alt (λ (a) (* 1 (/ 1 (* (- (acos a)) (/ 1 a)))))>
* * * * [misc]progress:  [ 46 / 56 ] simplifiying candidate #<alt (λ (a) (* 1 (/ 1 (* (- (acos a)) (/ 1 a)))))>
* * * * [misc]progress:  [ 47 / 56 ] simplifiying candidate #<alt (λ (a) (/ 1 (/ (* (- (acos a)) (/ 1 a)) 1)))>
* * * * [misc]progress:  [ 48 / 56 ] simplifiying candidate #<alt (λ (a) (/ (/ 1 (- (acos a))) (/ 1 a)))>
* [enter]simplify:  Simplifying (/ 1 a)
* * [misc]simplify:  iters left: 2 (3 enodes)
* * [misc]simplify:  iters left: 1 (5 enodes)
* [exit]simplify:  Simplified to (/ 1 a)
* [misc]simplify:  Simplified (2 2) to (λ (a) (/ (/ 1 (- (acos a))) (/ 1 a)))
* * * * [misc]progress:  [ 49 / 56 ] simplifiying candidate #<alt (λ (a) (* (/ 1 (- (acos a))) a))>
* * * * [misc]progress:  [ 50 / 56 ] simplifiying candidate #<alt (λ (a) (* (/ 1 (* (- (acos a)) 1)) a))>
* * * * [misc]progress:  [ 51 / 56 ] simplifiying candidate #<alt (λ (a) (/ 1 (* -1 (/ (acos a) a))))>
* [enter]simplify:  Simplifying (* -1 (/ (acos a) a))
* * [misc]simplify:  iters left: 5 (5 enodes)
* * [misc]simplify:  iters left: 4 (9 enodes)
* * [misc]simplify:  iters left: 3 (14 enodes)
* * [misc]simplify:  iters left: 2 (16 enodes)
* * [misc]simplify:  iters left: 1 (18 enodes)
* [exit]simplify:  Simplified to (/ (acos a) (/ a -1))
* [misc]simplify:  Simplified (2 2) to (λ (a) (/ 1 (/ (acos a) (/ a -1))))
* * * * [misc]progress:  [ 52 / 56 ] simplifiying candidate #<alt (λ (a) (/ 1 (* -1 (/ (acos a) a))))>
* [enter]simplify:  Simplifying (* -1 (/ (acos a) a))
* * [misc]simplify:  iters left: 5 (5 enodes)
* * [misc]simplify:  iters left: 4 (9 enodes)
* * [misc]simplify:  iters left: 3 (14 enodes)
* * [misc]simplify:  iters left: 2 (16 enodes)
* * [misc]simplify:  iters left: 1 (18 enodes)
* [exit]simplify:  Simplified to (/ (acos a) (/ a -1))
* [misc]simplify:  Simplified (2 2) to (λ (a) (/ 1 (/ (acos a) (/ a -1))))
* * * * [misc]progress:  [ 53 / 56 ] simplifiying candidate #<alt (λ (a) (/ 1 (* -1 (/ (acos a) a))))>
* [enter]simplify:  Simplifying (* -1 (/ (acos a) a))
* * [misc]simplify:  iters left: 5 (5 enodes)
* * [misc]simplify:  iters left: 4 (9 enodes)
* * [misc]simplify:  iters left: 3 (14 enodes)
* * [misc]simplify:  iters left: 2 (16 enodes)
* * [misc]simplify:  iters left: 1 (18 enodes)
* [exit]simplify:  Simplified to (/ (acos a) (/ a -1))
* [misc]simplify:  Simplified (2 2) to (λ (a) (/ 1 (/ (acos a) (/ a -1))))
* * * * [misc]progress:  [ 54 / 56 ] simplifiying candidate #<alt (λ (a) (* -1 (/ a (acos a))))>
* [enter]simplify:  Simplifying (* -1 (/ a (acos a)))
* * [misc]simplify:  iters left: 5 (5 enodes)
* * [misc]simplify:  iters left: 4 (9 enodes)
* * [misc]simplify:  iters left: 3 (14 enodes)
* * [misc]simplify:  iters left: 2 (16 enodes)
* * [misc]simplify:  iters left: 1 (18 enodes)
* [exit]simplify:  Simplified to (/ (- a) (acos a))
* [misc]simplify:  Simplified (2) to (λ (a) (/ (- a) (acos a)))
* * * * [misc]progress:  [ 55 / 56 ] simplifiying candidate #<alt (λ (a) (* -1 (/ a (acos a))))>
* [enter]simplify:  Simplifying (* -1 (/ a (acos a)))
* * [misc]simplify:  iters left: 5 (5 enodes)
* * [misc]simplify:  iters left: 4 (9 enodes)
* * [misc]simplify:  iters left: 3 (14 enodes)
* * [misc]simplify:  iters left: 2 (16 enodes)
* * [misc]simplify:  iters left: 1 (18 enodes)
* [exit]simplify:  Simplified to (/ (- a) (acos a))
* [misc]simplify:  Simplified (2) to (λ (a) (/ (- a) (acos a)))
* * * * [misc]progress:  [ 56 / 56 ] simplifiying candidate #<alt (λ (a) (* -1 (/ a (acos a))))>
* [enter]simplify:  Simplifying (* -1 (/ a (acos a)))
* * [misc]simplify:  iters left: 5 (5 enodes)
* * [misc]simplify:  iters left: 4 (9 enodes)
* * [misc]simplify:  iters left: 3 (14 enodes)
* * [misc]simplify:  iters left: 2 (16 enodes)
* * [misc]simplify:  iters left: 1 (18 enodes)
* [exit]simplify:  Simplified to (/ (- a) (acos a))
* [misc]simplify:  Simplified (2) to (λ (a) (/ (- a) (acos a)))
* * * [misc]progress:  adding candidates to table
* * [misc]progress:  iteration 4 / 4
* * * [misc]progress:  picking best candidate
* * * * [misc]pick:  Picked  #<alt (λ (a) (/ (/ 1 (- (acos a))) (/ 1 a)))>
* * * [misc]progress:  localizing error
* * * [misc]progress:  generating rewritten candidates
* * * * [misc]progress:  [ 1 / 2 ] rewriting at (2)
* * * * [misc]progress:  [ 2 / 2 ] rewriting at (2 1)
* * * [misc]progress:  generating series expansions
* * * * [misc]progress:  [ 1 / 2 ] generating series at (2)
* [misc]approximate:  Taking taylor expansion of (/ (/ 1 (- (acos a))) (/ 1 a)) in (a) around 0
* [misc]taylor:  Taking taylor expansion of (/ (/ 1 (- (acos a))) (/ 1 a)) in a
* [misc]taylor:  Taking taylor expansion of (/ 1 (- (acos a))) in a
* [misc]taylor:  Taking taylor expansion of (- (acos a)) in a
* [misc]taylor:  Taking taylor expansion of (acos a) in a
* [misc]backup-simplify:  Simplify (acos a) into (acos a)
* [misc]backup-simplify:  Simplify (- (acos a)) into (- (acos a))
* [misc]backup-simplify:  Simplify (- (acos a)) into (- (acos a))
* [misc]backup-simplify:  Simplify (/ 1 (- (acos a))) into (/ -1 (acos a))
* [misc]taylor:  Taking taylor expansion of (/ 1 a) in a
* [misc]taylor:  Taking taylor expansion of a in a
* [misc]backup-simplify:  Simplify 0 into 0
* [misc]backup-simplify:  Simplify 1 into 1
* [misc]backup-simplify:  Simplify (/ 1 1) into 1
* [misc]backup-simplify:  Simplify (/ (/ -1 (acos a)) 1) into (/ -1 (acos a))
* [misc]taylor:  Taking taylor expansion of (/ (/ 1 (- (acos a))) (/ 1 a)) in a
* [misc]taylor:  Taking taylor expansion of (/ 1 (- (acos a))) in a
* [misc]taylor:  Taking taylor expansion of (- (acos a)) in a
* [misc]taylor:  Taking taylor expansion of (acos a) in a
* [misc]backup-simplify:  Simplify (acos a) into (acos a)
* [misc]backup-simplify:  Simplify (- (acos a)) into (- (acos a))
* [misc]backup-simplify:  Simplify (- (acos a)) into (- (acos a))
* [misc]backup-simplify:  Simplify (/ 1 (- (acos a))) into (/ -1 (acos a))
* [misc]taylor:  Taking taylor expansion of (/ 1 a) in a
* [misc]taylor:  Taking taylor expansion of a in a
* [misc]backup-simplify:  Simplify 0 into 0
* [misc]backup-simplify:  Simplify 1 into 1
* [misc]backup-simplify:  Simplify (/ 1 1) into 1
* [misc]backup-simplify:  Simplify (/ (/ -1 (acos a)) 1) into (/ -1 (acos a))
* [misc]backup-simplify:  Simplify (/ -1 (acos a)) into (/ -1 (acos a))
* [misc]backup-simplify:  Simplify (- 0) into 0
* [misc]backup-simplify:  Simplify (- (acos a)) into (- (acos a))
* [misc]backup-simplify:  Simplify (- (+ (* (/ -1 (acos a)) (/ 0 (- (acos a)))))) into 0
* [misc]backup-simplify:  Simplify (- (+ (* 1 (/ 0 1)))) into 0
* [misc]backup-simplify:  Simplify (- (/ 0 1) (+ (* (/ -1 (acos a)) (/ 0 1)))) into 0
* [misc]backup-simplify:  Simplify 0 into 0
* [misc]backup-simplify:  Simplify (- 0) into 0
* [misc]backup-simplify:  Simplify (- (acos a)) into (- (acos a))
* [misc]backup-simplify:  Simplify (- 0) into 0
* [misc]backup-simplify:  Simplify (- (acos a)) into (- (acos a))
* [misc]backup-simplify:  Simplify (- (+ (* (/ -1 (acos a)) (/ 0 (- (acos a)))) (* 0 (/ 0 (- (acos a)))))) into 0
* [misc]backup-simplify:  Simplify (- (+ (* 1 (/ 0 1)) (* 0 (/ 0 1)))) into 0
* [misc]backup-simplify:  Simplify (- (/ 0 1) (+ (* (/ -1 (acos a)) (/ 0 1)) (* 0 (/ 0 1)))) into 0
* [misc]backup-simplify:  Simplify 0 into 0
* [misc]backup-simplify:  Simplify (- 0) into 0
* [misc]backup-simplify:  Simplify (- (acos a)) into (- (acos a))
* [misc]backup-simplify:  Simplify (- 0) into 0
* [misc]backup-simplify:  Simplify (- (acos a)) into (- (acos a))
* [misc]backup-simplify:  Simplify (- 0) into 0
* [misc]backup-simplify:  Simplify (- (acos a)) into (- (acos a))
* [misc]backup-simplify:  Simplify (- (+ (* (/ -1 (acos a)) (/ 0 (- (acos a)))) (* 0 (/ 0 (- (acos a)))) (* 0 (/ 0 (- (acos a)))))) into 0
* [misc]backup-simplify:  Simplify (- (+ (* 1 (/ 0 1)) (* 0 (/ 0 1)) (* 0 (/ 0 1)))) into 0
* [misc]backup-simplify:  Simplify (- (/ 0 1) (+ (* (/ -1 (acos a)) (/ 0 1)) (* 0 (/ 0 1)) (* 0 (/ 0 1)))) into 0
* [misc]backup-simplify:  Simplify 0 into 0
* [misc]backup-simplify:  Simplify (- 0) into 0
* [misc]backup-simplify:  Simplify (- (acos a)) into (- (acos a))
* [misc]backup-simplify:  Simplify (- 0) into 0
* [misc]backup-simplify:  Simplify (- (acos a)) into (- (acos a))
* [misc]backup-simplify:  Simplify (- 0) into 0
* [misc]backup-simplify:  Simplify (- (acos a)) into (- (acos a))
* [misc]backup-simplify:  Simplify (- 0) into 0
* [misc]backup-simplify:  Simplify (- (acos a)) into (- (acos a))
* [misc]backup-simplify:  Simplify (- (+ (* (/ -1 (acos a)) (/ 0 (- (acos a)))) (* 0 (/ 0 (- (acos a)))) (* 0 (/ 0 (- (acos a)))) (* 0 (/ 0 (- (acos a)))))) into 0
* [misc]backup-simplify:  Simplify (- (+ (* 1 (/ 0 1)) (* 0 (/ 0 1)) (* 0 (/ 0 1)) (* 0 (/ 0 1)))) into 0
* [misc]backup-simplify:  Simplify (- (/ 0 1) (+ (* (/ -1 (acos a)) (/ 0 1)) (* 0 (/ 0 1)) (* 0 (/ 0 1)) (* 0 (/ 0 1)))) into 0
* [misc]backup-simplify:  Simplify 0 into 0
* [misc]backup-simplify:  Simplify (- 0) into 0
* [misc]backup-simplify:  Simplify (- (acos a)) into (- (acos a))
* [misc]backup-simplify:  Simplify (- 0) into 0
* [misc]backup-simplify:  Simplify (- (acos a)) into (- (acos a))
* [misc]backup-simplify:  Simplify (- 0) into 0
* [misc]backup-simplify:  Simplify (- (acos a)) into (- (acos a))
* [misc]backup-simplify:  Simplify (- 0) into 0
* [misc]backup-simplify:  Simplify (- (acos a)) into (- (acos a))
* [misc]backup-simplify:  Simplify (- 0) into 0
* [misc]backup-simplify:  Simplify (- (acos a)) into (- (acos a))
* [misc]backup-simplify:  Simplify (- (+ (* (/ -1 (acos a)) (/ 0 (- (acos a)))) (* 0 (/ 0 (- (acos a)))) (* 0 (/ 0 (- (acos a)))) (* 0 (/ 0 (- (acos a)))) (* 0 (/ 0 (- (acos a)))))) into 0
* [misc]backup-simplify:  Simplify (- (+ (* 1 (/ 0 1)) (* 0 (/ 0 1)) (* 0 (/ 0 1)) (* 0 (/ 0 1)) (* 0 (/ 0 1)))) into 0
* [misc]backup-simplify:  Simplify (- (/ 0 1) (+ (* (/ -1 (acos a)) (/ 0 1)) (* 0 (/ 0 1)) (* 0 (/ 0 1)) (* 0 (/ 0 1)) (* 0 (/ 0 1)))) into 0
* [misc]backup-simplify:  Simplify 0 into 0
* [misc]backup-simplify:  Simplify (- 0) into 0
* [misc]backup-simplify:  Simplify (- (acos a)) into (- (acos a))
* [misc]backup-simplify:  Simplify (- 0) into 0
* [misc]backup-simplify:  Simplify (- (acos a)) into (- (acos a))
* [misc]backup-simplify:  Simplify (- 0) into 0
* [misc]backup-simplify:  Simplify (- (acos a)) into (- (acos a))
* [misc]backup-simplify:  Simplify (- 0) into 0
* [misc]backup-simplify:  Simplify (- (acos a)) into (- (acos a))
* [misc]backup-simplify:  Simplify (- 0) into 0
* [misc]backup-simplify:  Simplify (- (acos a)) into (- (acos a))
* [misc]backup-simplify:  Simplify (- 0) into 0
* [misc]backup-simplify:  Simplify (- (acos a)) into (- (acos a))
* [misc]backup-simplify:  Simplify (- (+ (* (/ -1 (acos a)) (/ 0 (- (acos a)))) (* 0 (/ 0 (- (acos a)))) (* 0 (/ 0 (- (acos a)))) (* 0 (/ 0 (- (acos a)))) (* 0 (/ 0 (- (acos a)))) (* 0 (/ 0 (- (acos a)))))) into 0
* [misc]backup-simplify:  Simplify (- (+ (* 1 (/ 0 1)) (* 0 (/ 0 1)) (* 0 (/ 0 1)) (* 0 (/ 0 1)) (* 0 (/ 0 1)) (* 0 (/ 0 1)))) into 0
* [misc]backup-simplify:  Simplify (- (/ 0 1) (+ (* (/ -1 (acos a)) (/ 0 1)) (* 0 (/ 0 1)) (* 0 (/ 0 1)) (* 0 (/ 0 1)) (* 0 (/ 0 1)) (* 0 (/ 0 1)))) into 0
* [misc]backup-simplify:  Simplify 0 into 0
* [misc]backup-simplify:  Simplify (* (/ -1 (acos a)) a) into (* -1 (/ a (acos a)))
* [misc]approximate:  Taking taylor expansion of (/ (/ 1 (- (acos (/ 1 a)))) (/ 1 (/ 1 a))) in (a) around 0
* [misc]taylor:  Taking taylor expansion of (/ (/ 1 (- (acos (/ 1 a)))) (/ 1 (/ 1 a))) in a
* [misc]taylor:  Taking taylor expansion of (/ 1 (- (acos (/ 1 a)))) in a
* [misc]taylor:  Taking taylor expansion of (- (acos (/ 1 a))) in a
* [misc]taylor:  Taking taylor expansion of (acos (/ 1 a)) in a
* [misc]backup-simplify:  Simplify (acos (/ 1 a)) into (acos (/ 1 a))
* [misc]backup-simplify:  Simplify (- (acos (/ 1 a))) into (- (acos (/ 1 a)))
* [misc]backup-simplify:  Simplify (- (acos (/ 1 a))) into (- (acos (/ 1 a)))
* [misc]backup-simplify:  Simplify (/ 1 (- (acos (/ 1 a)))) into (/ -1 (acos (/ 1 a)))
* [misc]taylor:  Taking taylor expansion of (/ 1 (/ 1 a)) in a
* [misc]taylor:  Taking taylor expansion of (/ 1 a) in a
* [misc]taylor:  Taking taylor expansion of a in a
* [misc]backup-simplify:  Simplify 0 into 0
* [misc]backup-simplify:  Simplify 1 into 1
* [misc]backup-simplify:  Simplify (/ 1 1) into 1
* [misc]backup-simplify:  Simplify (/ 1 1) into 1
* [misc]backup-simplify:  Simplify (/ (/ -1 (acos (/ 1 a))) 1) into (/ -1 (acos (/ 1 a)))
* [misc]taylor:  Taking taylor expansion of (/ (/ 1 (- (acos (/ 1 a)))) (/ 1 (/ 1 a))) in a
* [misc]taylor:  Taking taylor expansion of (/ 1 (- (acos (/ 1 a)))) in a
* [misc]taylor:  Taking taylor expansion of (- (acos (/ 1 a))) in a
* [misc]taylor:  Taking taylor expansion of (acos (/ 1 a)) in a
* [misc]backup-simplify:  Simplify (acos (/ 1 a)) into (acos (/ 1 a))
* [misc]backup-simplify:  Simplify (- (acos (/ 1 a))) into (- (acos (/ 1 a)))
* [misc]backup-simplify:  Simplify (- (acos (/ 1 a))) into (- (acos (/ 1 a)))
* [misc]backup-simplify:  Simplify (/ 1 (- (acos (/ 1 a)))) into (/ -1 (acos (/ 1 a)))
* [misc]taylor:  Taking taylor expansion of (/ 1 (/ 1 a)) in a
* [misc]taylor:  Taking taylor expansion of (/ 1 a) in a
* [misc]taylor:  Taking taylor expansion of a in a
* [misc]backup-simplify:  Simplify 0 into 0
* [misc]backup-simplify:  Simplify 1 into 1
* [misc]backup-simplify:  Simplify (/ 1 1) into 1
* [misc]backup-simplify:  Simplify (/ 1 1) into 1
* [misc]backup-simplify:  Simplify (/ (/ -1 (acos (/ 1 a))) 1) into (/ -1 (acos (/ 1 a)))
* [misc]backup-simplify:  Simplify (/ -1 (acos (/ 1 a))) into (/ -1 (acos (/ 1 a)))
* [misc]backup-simplify:  Simplify (- 0) into 0
* [misc]backup-simplify:  Simplify (- (acos (/ 1 a))) into (- (acos (/ 1 a)))
* [misc]backup-simplify:  Simplify (- (+ (* (/ -1 (acos (/ 1 a))) (/ 0 (- (acos (/ 1 a))))))) into 0
* [misc]backup-simplify:  Simplify (- (+ (* 1 (/ 0 1)))) into 0
* [misc]backup-simplify:  Simplify (- (+ (* 1 (/ 0 1)))) into 0
* [misc]backup-simplify:  Simplify (- (/ 0 1) (+ (* (/ -1 (acos (/ 1 a))) (/ 0 1)))) into 0
* [misc]backup-simplify:  Simplify 0 into 0
* [misc]backup-simplify:  Simplify (- 0) into 0
* [misc]backup-simplify:  Simplify (- (acos (/ 1 a))) into (- (acos (/ 1 a)))
* [misc]backup-simplify:  Simplify (- 0) into 0
* [misc]backup-simplify:  Simplify (- (acos (/ 1 a))) into (- (acos (/ 1 a)))
* [misc]backup-simplify:  Simplify (- (+ (* (/ -1 (acos (/ 1 a))) (/ 0 (- (acos (/ 1 a))))) (* 0 (/ 0 (- (acos (/ 1 a))))))) into 0
* [misc]backup-simplify:  Simplify (- (+ (* 1 (/ 0 1)) (* 0 (/ 0 1)))) into 0
* [misc]backup-simplify:  Simplify (- (+ (* 1 (/ 0 1)) (* 0 (/ 0 1)))) into 0
* [misc]backup-simplify:  Simplify (- (/ 0 1) (+ (* (/ -1 (acos (/ 1 a))) (/ 0 1)) (* 0 (/ 0 1)))) into 0
* [misc]backup-simplify:  Simplify 0 into 0
* [misc]backup-simplify:  Simplify (- 0) into 0
* [misc]backup-simplify:  Simplify (- (acos (/ 1 a))) into (- (acos (/ 1 a)))
* [misc]backup-simplify:  Simplify (- 0) into 0
* [misc]backup-simplify:  Simplify (- (acos (/ 1 a))) into (- (acos (/ 1 a)))
* [misc]backup-simplify:  Simplify (- 0) into 0
* [misc]backup-simplify:  Simplify (- (acos (/ 1 a))) into (- (acos (/ 1 a)))
* [misc]backup-simplify:  Simplify (- (+ (* (/ -1 (acos (/ 1 a))) (/ 0 (- (acos (/ 1 a))))) (* 0 (/ 0 (- (acos (/ 1 a))))) (* 0 (/ 0 (- (acos (/ 1 a))))))) into 0
* [misc]backup-simplify:  Simplify (- (+ (* 1 (/ 0 1)) (* 0 (/ 0 1)) (* 0 (/ 0 1)))) into 0
* [misc]backup-simplify:  Simplify (- (+ (* 1 (/ 0 1)) (* 0 (/ 0 1)) (* 0 (/ 0 1)))) into 0
* [misc]backup-simplify:  Simplify (- (/ 0 1) (+ (* (/ -1 (acos (/ 1 a))) (/ 0 1)) (* 0 (/ 0 1)) (* 0 (/ 0 1)))) into 0
* [misc]backup-simplify:  Simplify 0 into 0
* [misc]backup-simplify:  Simplify (- 0) into 0
* [misc]backup-simplify:  Simplify (- (acos (/ 1 a))) into (- (acos (/ 1 a)))
* [misc]backup-simplify:  Simplify (- 0) into 0
* [misc]backup-simplify:  Simplify (- (acos (/ 1 a))) into (- (acos (/ 1 a)))
* [misc]backup-simplify:  Simplify (- 0) into 0
* [misc]backup-simplify:  Simplify (- (acos (/ 1 a))) into (- (acos (/ 1 a)))
* [misc]backup-simplify:  Simplify (- 0) into 0
* [misc]backup-simplify:  Simplify (- (acos (/ 1 a))) into (- (acos (/ 1 a)))
* [misc]backup-simplify:  Simplify (- (+ (* (/ -1 (acos (/ 1 a))) (/ 0 (- (acos (/ 1 a))))) (* 0 (/ 0 (- (acos (/ 1 a))))) (* 0 (/ 0 (- (acos (/ 1 a))))) (* 0 (/ 0 (- (acos (/ 1 a))))))) into 0
* [misc]backup-simplify:  Simplify (- (+ (* 1 (/ 0 1)) (* 0 (/ 0 1)) (* 0 (/ 0 1)) (* 0 (/ 0 1)))) into 0
* [misc]backup-simplify:  Simplify (- (+ (* 1 (/ 0 1)) (* 0 (/ 0 1)) (* 0 (/ 0 1)) (* 0 (/ 0 1)))) into 0
* [misc]backup-simplify:  Simplify (- (/ 0 1) (+ (* (/ -1 (acos (/ 1 a))) (/ 0 1)) (* 0 (/ 0 1)) (* 0 (/ 0 1)) (* 0 (/ 0 1)))) into 0
* [misc]backup-simplify:  Simplify 0 into 0
* [misc]backup-simplify:  Simplify (- 0) into 0
* [misc]backup-simplify:  Simplify (- (acos (/ 1 a))) into (- (acos (/ 1 a)))
* [misc]backup-simplify:  Simplify (- 0) into 0
* [misc]backup-simplify:  Simplify (- (acos (/ 1 a))) into (- (acos (/ 1 a)))
* [misc]backup-simplify:  Simplify (- 0) into 0
* [misc]backup-simplify:  Simplify (- (acos (/ 1 a))) into (- (acos (/ 1 a)))
* [misc]backup-simplify:  Simplify (- 0) into 0
* [misc]backup-simplify:  Simplify (- (acos (/ 1 a))) into (- (acos (/ 1 a)))
* [misc]backup-simplify:  Simplify (- 0) into 0
* [misc]backup-simplify:  Simplify (- (acos (/ 1 a))) into (- (acos (/ 1 a)))
* [misc]backup-simplify:  Simplify (- (+ (* (/ -1 (acos (/ 1 a))) (/ 0 (- (acos (/ 1 a))))) (* 0 (/ 0 (- (acos (/ 1 a))))) (* 0 (/ 0 (- (acos (/ 1 a))))) (* 0 (/ 0 (- (acos (/ 1 a))))) (* 0 (/ 0 (- (acos (/ 1 a))))))) into 0
* [misc]backup-simplify:  Simplify (- (+ (* 1 (/ 0 1)) (* 0 (/ 0 1)) (* 0 (/ 0 1)) (* 0 (/ 0 1)) (* 0 (/ 0 1)))) into 0
* [misc]backup-simplify:  Simplify (- (+ (* 1 (/ 0 1)) (* 0 (/ 0 1)) (* 0 (/ 0 1)) (* 0 (/ 0 1)) (* 0 (/ 0 1)))) into 0
* [misc]backup-simplify:  Simplify (- (/ 0 1) (+ (* (/ -1 (acos (/ 1 a))) (/ 0 1)) (* 0 (/ 0 1)) (* 0 (/ 0 1)) (* 0 (/ 0 1)) (* 0 (/ 0 1)))) into 0
* [misc]backup-simplify:  Simplify 0 into 0
* [misc]backup-simplify:  Simplify (- 0) into 0
* [misc]backup-simplify:  Simplify (- (acos (/ 1 a))) into (- (acos (/ 1 a)))
* [misc]backup-simplify:  Simplify (- 0) into 0
* [misc]backup-simplify:  Simplify (- (acos (/ 1 a))) into (- (acos (/ 1 a)))
* [misc]backup-simplify:  Simplify (- 0) into 0
* [misc]backup-simplify:  Simplify (- (acos (/ 1 a))) into (- (acos (/ 1 a)))
* [misc]backup-simplify:  Simplify (- 0) into 0
* [misc]backup-simplify:  Simplify (- (acos (/ 1 a))) into (- (acos (/ 1 a)))
* [misc]backup-simplify:  Simplify (- 0) into 0
* [misc]backup-simplify:  Simplify (- (acos (/ 1 a))) into (- (acos (/ 1 a)))
* [misc]backup-simplify:  Simplify (- 0) into 0
* [misc]backup-simplify:  Simplify (- (acos (/ 1 a))) into (- (acos (/ 1 a)))
* [misc]backup-simplify:  Simplify (- (+ (* (/ -1 (acos (/ 1 a))) (/ 0 (- (acos (/ 1 a))))) (* 0 (/ 0 (- (acos (/ 1 a))))) (* 0 (/ 0 (- (acos (/ 1 a))))) (* 0 (/ 0 (- (acos (/ 1 a))))) (* 0 (/ 0 (- (acos (/ 1 a))))) (* 0 (/ 0 (- (acos (/ 1 a))))))) into 0
* [misc]backup-simplify:  Simplify (- (+ (* 1 (/ 0 1)) (* 0 (/ 0 1)) (* 0 (/ 0 1)) (* 0 (/ 0 1)) (* 0 (/ 0 1)) (* 0 (/ 0 1)))) into 0
* [misc]backup-simplify:  Simplify (- (+ (* 1 (/ 0 1)) (* 0 (/ 0 1)) (* 0 (/ 0 1)) (* 0 (/ 0 1)) (* 0 (/ 0 1)) (* 0 (/ 0 1)))) into 0
* [misc]backup-simplify:  Simplify (- (/ 0 1) (+ (* (/ -1 (acos (/ 1 a))) (/ 0 1)) (* 0 (/ 0 1)) (* 0 (/ 0 1)) (* 0 (/ 0 1)) (* 0 (/ 0 1)) (* 0 (/ 0 1)))) into 0
* [misc]backup-simplify:  Simplify 0 into 0
* [misc]backup-simplify:  Simplify (* (/ -1 (acos (/ 1 (/ 1 a)))) (/ 1 (/ 1 a))) into (* -1 (/ a (acos a)))
* [misc]approximate:  Taking taylor expansion of (/ (/ 1 (- (acos (/ 1 (- a))))) (/ 1 (/ 1 (- a)))) in (a) around 0
* [misc]taylor:  Taking taylor expansion of (/ (/ 1 (- (acos (/ 1 (- a))))) (/ 1 (/ 1 (- a)))) in a
* [misc]taylor:  Taking taylor expansion of (/ 1 (- (acos (/ 1 (- a))))) in a
* [misc]taylor:  Taking taylor expansion of (- (acos (/ 1 (- a)))) in a
* [misc]taylor:  Taking taylor expansion of (acos (/ 1 (- a))) in a
* [misc]backup-simplify:  Simplify (acos (/ 1 (- a))) into (acos (/ -1 a))
* [misc]backup-simplify:  Simplify (- (acos (/ -1 a))) into (- (acos (/ -1 a)))
* [misc]backup-simplify:  Simplify (- (acos (/ -1 a))) into (- (acos (/ -1 a)))
* [misc]backup-simplify:  Simplify (/ 1 (- (acos (/ -1 a)))) into (/ -1 (acos (/ -1 a)))
* [misc]taylor:  Taking taylor expansion of (/ 1 (/ 1 (- a))) in a
* [misc]taylor:  Taking taylor expansion of (/ 1 (- a)) in a
* [misc]taylor:  Taking taylor expansion of (- a) in a
* [misc]taylor:  Taking taylor expansion of a in a
* [misc]backup-simplify:  Simplify 0 into 0
* [misc]backup-simplify:  Simplify 1 into 1
* [misc]backup-simplify:  Simplify (- 0) into 0
* [misc]backup-simplify:  Simplify (- 1) into -1
* [misc]backup-simplify:  Simplify (- 1) into -1
* [misc]backup-simplify:  Simplify (/ 1 -1) into -1
* [misc]backup-simplify:  Simplify (/ 1 -1) into -1
* [misc]backup-simplify:  Simplify (/ (/ -1 (acos (/ -1 a))) -1) into (/ 1 (acos (/ -1 a)))
* [misc]taylor:  Taking taylor expansion of (/ (/ 1 (- (acos (/ 1 (- a))))) (/ 1 (/ 1 (- a)))) in a
* [misc]taylor:  Taking taylor expansion of (/ 1 (- (acos (/ 1 (- a))))) in a
* [misc]taylor:  Taking taylor expansion of (- (acos (/ 1 (- a)))) in a
* [misc]taylor:  Taking taylor expansion of (acos (/ 1 (- a))) in a
* [misc]backup-simplify:  Simplify (acos (/ 1 (- a))) into (acos (/ -1 a))
* [misc]backup-simplify:  Simplify (- (acos (/ -1 a))) into (- (acos (/ -1 a)))
* [misc]backup-simplify:  Simplify (- (acos (/ -1 a))) into (- (acos (/ -1 a)))
* [misc]backup-simplify:  Simplify (/ 1 (- (acos (/ -1 a)))) into (/ -1 (acos (/ -1 a)))
* [misc]taylor:  Taking taylor expansion of (/ 1 (/ 1 (- a))) in a
* [misc]taylor:  Taking taylor expansion of (/ 1 (- a)) in a
* [misc]taylor:  Taking taylor expansion of (- a) in a
* [misc]taylor:  Taking taylor expansion of a in a
* [misc]backup-simplify:  Simplify 0 into 0
* [misc]backup-simplify:  Simplify 1 into 1
* [misc]backup-simplify:  Simplify (- 0) into 0
* [misc]backup-simplify:  Simplify (- 1) into -1
* [misc]backup-simplify:  Simplify (- 1) into -1
* [misc]backup-simplify:  Simplify (/ 1 -1) into -1
* [misc]backup-simplify:  Simplify (/ 1 -1) into -1
* [misc]backup-simplify:  Simplify (/ (/ -1 (acos (/ -1 a))) -1) into (/ 1 (acos (/ -1 a)))
* [misc]backup-simplify:  Simplify (/ 1 (acos (/ -1 a))) into (/ 1 (acos (/ -1 a)))
* [misc]backup-simplify:  Simplify (- 0) into 0
* [misc]backup-simplify:  Simplify (- (acos (/ -1 a))) into (- (acos (/ -1 a)))
* [misc]backup-simplify:  Simplify (- (+ (* (/ -1 (acos (/ -1 a))) (/ 0 (- (acos (/ -1 a))))))) into 0
* [misc]backup-simplify:  Simplify (- 0) into 0
* [misc]backup-simplify:  Simplify (- 1) into -1
* [misc]backup-simplify:  Simplify (- (+ (* -1 (/ 0 -1)))) into 0
* [misc]backup-simplify:  Simplify (- (+ (* -1 (/ 0 -1)))) into 0
* [misc]backup-simplify:  Simplify (- (/ 0 -1) (+ (* (/ 1 (acos (/ -1 a))) (/ 0 -1)))) into 0
* [misc]backup-simplify:  Simplify 0 into 0
* [misc]backup-simplify:  Simplify (- 0) into 0
* [misc]backup-simplify:  Simplify (- (acos (/ -1 a))) into (- (acos (/ -1 a)))
* [misc]backup-simplify:  Simplify (- 0) into 0
* [misc]backup-simplify:  Simplify (- (acos (/ -1 a))) into (- (acos (/ -1 a)))
* [misc]backup-simplify:  Simplify (- (+ (* (/ -1 (acos (/ -1 a))) (/ 0 (- (acos (/ -1 a))))) (* 0 (/ 0 (- (acos (/ -1 a))))))) into 0
* [misc]backup-simplify:  Simplify (- 0) into 0
* [misc]backup-simplify:  Simplify (- 1) into -1
* [misc]backup-simplify:  Simplify (- 0) into 0
* [misc]backup-simplify:  Simplify (- 1) into -1
* [misc]backup-simplify:  Simplify (- (+ (* -1 (/ 0 -1)) (* 0 (/ 0 -1)))) into 0
* [misc]backup-simplify:  Simplify (- (+ (* -1 (/ 0 -1)) (* 0 (/ 0 -1)))) into 0
* [misc]backup-simplify:  Simplify (- (/ 0 -1) (+ (* (/ 1 (acos (/ -1 a))) (/ 0 -1)) (* 0 (/ 0 -1)))) into 0
* [misc]backup-simplify:  Simplify 0 into 0
* [misc]backup-simplify:  Simplify (- 0) into 0
* [misc]backup-simplify:  Simplify (- (acos (/ -1 a))) into (- (acos (/ -1 a)))
* [misc]backup-simplify:  Simplify (- 0) into 0
* [misc]backup-simplify:  Simplify (- (acos (/ -1 a))) into (- (acos (/ -1 a)))
* [misc]backup-simplify:  Simplify (- 0) into 0
* [misc]backup-simplify:  Simplify (- (acos (/ -1 a))) into (- (acos (/ -1 a)))
* [misc]backup-simplify:  Simplify (- (+ (* (/ -1 (acos (/ -1 a))) (/ 0 (- (acos (/ -1 a))))) (* 0 (/ 0 (- (acos (/ -1 a))))) (* 0 (/ 0 (- (acos (/ -1 a))))))) into 0
* [misc]backup-simplify:  Simplify (- 0) into 0
* [misc]backup-simplify:  Simplify (- 1) into -1
* [misc]backup-simplify:  Simplify (- 0) into 0
* [misc]backup-simplify:  Simplify (- 1) into -1
* [misc]backup-simplify:  Simplify (- 0) into 0
* [misc]backup-simplify:  Simplify (- 1) into -1
* [misc]backup-simplify:  Simplify (- (+ (* -1 (/ 0 -1)) (* 0 (/ 0 -1)) (* 0 (/ 0 -1)))) into 0
* [misc]backup-simplify:  Simplify (- (+ (* -1 (/ 0 -1)) (* 0 (/ 0 -1)) (* 0 (/ 0 -1)))) into 0
* [misc]backup-simplify:  Simplify (- (/ 0 -1) (+ (* (/ 1 (acos (/ -1 a))) (/ 0 -1)) (* 0 (/ 0 -1)) (* 0 (/ 0 -1)))) into 0
* [misc]backup-simplify:  Simplify 0 into 0
* [misc]backup-simplify:  Simplify (- 0) into 0
* [misc]backup-simplify:  Simplify (- (acos (/ -1 a))) into (- (acos (/ -1 a)))
* [misc]backup-simplify:  Simplify (- 0) into 0
* [misc]backup-simplify:  Simplify (- (acos (/ -1 a))) into (- (acos (/ -1 a)))
* [misc]backup-simplify:  Simplify (- 0) into 0
* [misc]backup-simplify:  Simplify (- (acos (/ -1 a))) into (- (acos (/ -1 a)))
* [misc]backup-simplify:  Simplify (- 0) into 0
* [misc]backup-simplify:  Simplify (- (acos (/ -1 a))) into (- (acos (/ -1 a)))
* [misc]backup-simplify:  Simplify (- (+ (* (/ -1 (acos (/ -1 a))) (/ 0 (- (acos (/ -1 a))))) (* 0 (/ 0 (- (acos (/ -1 a))))) (* 0 (/ 0 (- (acos (/ -1 a))))) (* 0 (/ 0 (- (acos (/ -1 a))))))) into 0
* [misc]backup-simplify:  Simplify (- 0) into 0
* [misc]backup-simplify:  Simplify (- 1) into -1
* [misc]backup-simplify:  Simplify (- 0) into 0
* [misc]backup-simplify:  Simplify (- 1) into -1
* [misc]backup-simplify:  Simplify (- 0) into 0
* [misc]backup-simplify:  Simplify (- 1) into -1
* [misc]backup-simplify:  Simplify (- 0) into 0
* [misc]backup-simplify:  Simplify (- 1) into -1
* [misc]backup-simplify:  Simplify (- (+ (* -1 (/ 0 -1)) (* 0 (/ 0 -1)) (* 0 (/ 0 -1)) (* 0 (/ 0 -1)))) into 0
* [misc]backup-simplify:  Simplify (- (+ (* -1 (/ 0 -1)) (* 0 (/ 0 -1)) (* 0 (/ 0 -1)) (* 0 (/ 0 -1)))) into 0
* [misc]backup-simplify:  Simplify (- (/ 0 -1) (+ (* (/ 1 (acos (/ -1 a))) (/ 0 -1)) (* 0 (/ 0 -1)) (* 0 (/ 0 -1)) (* 0 (/ 0 -1)))) into 0
* [misc]backup-simplify:  Simplify 0 into 0
* [misc]backup-simplify:  Simplify (- 0) into 0
* [misc]backup-simplify:  Simplify (- (acos (/ -1 a))) into (- (acos (/ -1 a)))
* [misc]backup-simplify:  Simplify (- 0) into 0
* [misc]backup-simplify:  Simplify (- (acos (/ -1 a))) into (- (acos (/ -1 a)))
* [misc]backup-simplify:  Simplify (- 0) into 0
* [misc]backup-simplify:  Simplify (- (acos (/ -1 a))) into (- (acos (/ -1 a)))
* [misc]backup-simplify:  Simplify (- 0) into 0
* [misc]backup-simplify:  Simplify (- (acos (/ -1 a))) into (- (acos (/ -1 a)))
* [misc]backup-simplify:  Simplify (- 0) into 0
* [misc]backup-simplify:  Simplify (- (acos (/ -1 a))) into (- (acos (/ -1 a)))
* [misc]backup-simplify:  Simplify (- (+ (* (/ -1 (acos (/ -1 a))) (/ 0 (- (acos (/ -1 a))))) (* 0 (/ 0 (- (acos (/ -1 a))))) (* 0 (/ 0 (- (acos (/ -1 a))))) (* 0 (/ 0 (- (acos (/ -1 a))))) (* 0 (/ 0 (- (acos (/ -1 a))))))) into 0
* [misc]backup-simplify:  Simplify (- 0) into 0
* [misc]backup-simplify:  Simplify (- 1) into -1
* [misc]backup-simplify:  Simplify (- 0) into 0
* [misc]backup-simplify:  Simplify (- 1) into -1
* [misc]backup-simplify:  Simplify (- 0) into 0
* [misc]backup-simplify:  Simplify (- 1) into -1
* [misc]backup-simplify:  Simplify (- 0) into 0
* [misc]backup-simplify:  Simplify (- 1) into -1
* [misc]backup-simplify:  Simplify (- 0) into 0
* [misc]backup-simplify:  Simplify (- 1) into -1
* [misc]backup-simplify:  Simplify (- (+ (* -1 (/ 0 -1)) (* 0 (/ 0 -1)) (* 0 (/ 0 -1)) (* 0 (/ 0 -1)) (* 0 (/ 0 -1)))) into 0
* [misc]backup-simplify:  Simplify (- (+ (* -1 (/ 0 -1)) (* 0 (/ 0 -1)) (* 0 (/ 0 -1)) (* 0 (/ 0 -1)) (* 0 (/ 0 -1)))) into 0
* [misc]backup-simplify:  Simplify (- (/ 0 -1) (+ (* (/ 1 (acos (/ -1 a))) (/ 0 -1)) (* 0 (/ 0 -1)) (* 0 (/ 0 -1)) (* 0 (/ 0 -1)) (* 0 (/ 0 -1)))) into 0
* [misc]backup-simplify:  Simplify 0 into 0
* [misc]backup-simplify:  Simplify (- 0) into 0
* [misc]backup-simplify:  Simplify (- (acos (/ -1 a))) into (- (acos (/ -1 a)))
* [misc]backup-simplify:  Simplify (- 0) into 0
* [misc]backup-simplify:  Simplify (- (acos (/ -1 a))) into (- (acos (/ -1 a)))
* [misc]backup-simplify:  Simplify (- 0) into 0
* [misc]backup-simplify:  Simplify (- (acos (/ -1 a))) into (- (acos (/ -1 a)))
* [misc]backup-simplify:  Simplify (- 0) into 0
* [misc]backup-simplify:  Simplify (- (acos (/ -1 a))) into (- (acos (/ -1 a)))
* [misc]backup-simplify:  Simplify (- 0) into 0
* [misc]backup-simplify:  Simplify (- (acos (/ -1 a))) into (- (acos (/ -1 a)))
* [misc]backup-simplify:  Simplify (- 0) into 0
* [misc]backup-simplify:  Simplify (- (acos (/ -1 a))) into (- (acos (/ -1 a)))
* [misc]backup-simplify:  Simplify (- (+ (* (/ -1 (acos (/ -1 a))) (/ 0 (- (acos (/ -1 a))))) (* 0 (/ 0 (- (acos (/ -1 a))))) (* 0 (/ 0 (- (acos (/ -1 a))))) (* 0 (/ 0 (- (acos (/ -1 a))))) (* 0 (/ 0 (- (acos (/ -1 a))))) (* 0 (/ 0 (- (acos (/ -1 a))))))) into 0
* [misc]backup-simplify:  Simplify (- 0) into 0
* [misc]backup-simplify:  Simplify (- 1) into -1
* [misc]backup-simplify:  Simplify (- 0) into 0
* [misc]backup-simplify:  Simplify (- 1) into -1
* [misc]backup-simplify:  Simplify (- 0) into 0
* [misc]backup-simplify:  Simplify (- 1) into -1
* [misc]backup-simplify:  Simplify (- 0) into 0
* [misc]backup-simplify:  Simplify (- 1) into -1
* [misc]backup-simplify:  Simplify (- 0) into 0
* [misc]backup-simplify:  Simplify (- 1) into -1
* [misc]backup-simplify:  Simplify (- 0) into 0
* [misc]backup-simplify:  Simplify (- 1) into -1
* [misc]backup-simplify:  Simplify (- (+ (* -1 (/ 0 -1)) (* 0 (/ 0 -1)) (* 0 (/ 0 -1)) (* 0 (/ 0 -1)) (* 0 (/ 0 -1)) (* 0 (/ 0 -1)))) into 0
* [misc]backup-simplify:  Simplify (- (+ (* -1 (/ 0 -1)) (* 0 (/ 0 -1)) (* 0 (/ 0 -1)) (* 0 (/ 0 -1)) (* 0 (/ 0 -1)) (* 0 (/ 0 -1)))) into 0
* [misc]backup-simplify:  Simplify (- (/ 0 -1) (+ (* (/ 1 (acos (/ -1 a))) (/ 0 -1)) (* 0 (/ 0 -1)) (* 0 (/ 0 -1)) (* 0 (/ 0 -1)) (* 0 (/ 0 -1)) (* 0 (/ 0 -1)))) into 0
* [misc]backup-simplify:  Simplify 0 into 0
* [misc]backup-simplify:  Simplify (* (/ 1 (acos (/ -1 (/ 1 (- a))))) (/ 1 (/ 1 (- a)))) into (* -1 (/ a (acos a)))
* * * * [misc]progress:  [ 2 / 2 ] generating series at (2 1)
* [misc]approximate:  Taking taylor expansion of (/ 1 (- (acos a))) in (a) around 0
* [misc]taylor:  Taking taylor expansion of (/ 1 (- (acos a))) in a
* [misc]taylor:  Taking taylor expansion of (- (acos a)) in a
* [misc]taylor:  Taking taylor expansion of (acos a) in a
* [misc]backup-simplify:  Simplify (acos a) into (acos a)
* [misc]backup-simplify:  Simplify (- (acos a)) into (- (acos a))
* [misc]backup-simplify:  Simplify (- (acos a)) into (- (acos a))
* [misc]backup-simplify:  Simplify (/ 1 (- (acos a))) into (/ -1 (acos a))
* [misc]taylor:  Taking taylor expansion of (/ 1 (- (acos a))) in a
* [misc]taylor:  Taking taylor expansion of (- (acos a)) in a
* [misc]taylor:  Taking taylor expansion of (acos a) in a
* [misc]backup-simplify:  Simplify (acos a) into (acos a)
* [misc]backup-simplify:  Simplify (- (acos a)) into (- (acos a))
* [misc]backup-simplify:  Simplify (- (acos a)) into (- (acos a))
* [misc]backup-simplify:  Simplify (/ 1 (- (acos a))) into (/ -1 (acos a))
* [misc]backup-simplify:  Simplify (/ -1 (acos a)) into (/ -1 (acos a))
* [misc]backup-simplify:  Simplify (- 0) into 0
* [misc]backup-simplify:  Simplify (- (acos a)) into (- (acos a))
* [misc]backup-simplify:  Simplify (- (+ (* (/ -1 (acos a)) (/ 0 (- (acos a)))))) into 0
* [misc]backup-simplify:  Simplify 0 into 0
* [misc]backup-simplify:  Simplify (- 0) into 0
* [misc]backup-simplify:  Simplify (- (acos a)) into (- (acos a))
* [misc]backup-simplify:  Simplify (- 0) into 0
* [misc]backup-simplify:  Simplify (- (acos a)) into (- (acos a))
* [misc]backup-simplify:  Simplify (- (+ (* (/ -1 (acos a)) (/ 0 (- (acos a)))) (* 0 (/ 0 (- (acos a)))))) into 0
* [misc]backup-simplify:  Simplify 0 into 0
* [misc]backup-simplify:  Simplify (- 0) into 0
* [misc]backup-simplify:  Simplify (- (acos a)) into (- (acos a))
* [misc]backup-simplify:  Simplify (- 0) into 0
* [misc]backup-simplify:  Simplify (- (acos a)) into (- (acos a))
* [misc]backup-simplify:  Simplify (- 0) into 0
* [misc]backup-simplify:  Simplify (- (acos a)) into (- (acos a))
* [misc]backup-simplify:  Simplify (- (+ (* (/ -1 (acos a)) (/ 0 (- (acos a)))) (* 0 (/ 0 (- (acos a)))) (* 0 (/ 0 (- (acos a)))))) into 0
* [misc]backup-simplify:  Simplify 0 into 0
* [misc]backup-simplify:  Simplify (- 0) into 0
* [misc]backup-simplify:  Simplify (- (acos a)) into (- (acos a))
* [misc]backup-simplify:  Simplify (- 0) into 0
* [misc]backup-simplify:  Simplify (- (acos a)) into (- (acos a))
* [misc]backup-simplify:  Simplify (- 0) into 0
* [misc]backup-simplify:  Simplify (- (acos a)) into (- (acos a))
* [misc]backup-simplify:  Simplify (- 0) into 0
* [misc]backup-simplify:  Simplify (- (acos a)) into (- (acos a))
* [misc]backup-simplify:  Simplify (- (+ (* (/ -1 (acos a)) (/ 0 (- (acos a)))) (* 0 (/ 0 (- (acos a)))) (* 0 (/ 0 (- (acos a)))) (* 0 (/ 0 (- (acos a)))))) into 0
* [misc]backup-simplify:  Simplify 0 into 0
* [misc]backup-simplify:  Simplify (- 0) into 0
* [misc]backup-simplify:  Simplify (- (acos a)) into (- (acos a))
* [misc]backup-simplify:  Simplify (- 0) into 0
* [misc]backup-simplify:  Simplify (- (acos a)) into (- (acos a))
* [misc]backup-simplify:  Simplify (- 0) into 0
* [misc]backup-simplify:  Simplify (- (acos a)) into (- (acos a))
* [misc]backup-simplify:  Simplify (- 0) into 0
* [misc]backup-simplify:  Simplify (- (acos a)) into (- (acos a))
* [misc]backup-simplify:  Simplify (- 0) into 0
* [misc]backup-simplify:  Simplify (- (acos a)) into (- (acos a))
* [misc]backup-simplify:  Simplify (- (+ (* (/ -1 (acos a)) (/ 0 (- (acos a)))) (* 0 (/ 0 (- (acos a)))) (* 0 (/ 0 (- (acos a)))) (* 0 (/ 0 (- (acos a)))) (* 0 (/ 0 (- (acos a)))))) into 0
* [misc]backup-simplify:  Simplify 0 into 0
* [misc]backup-simplify:  Simplify (- 0) into 0
* [misc]backup-simplify:  Simplify (- (acos a)) into (- (acos a))
* [misc]backup-simplify:  Simplify (- 0) into 0
* [misc]backup-simplify:  Simplify (- (acos a)) into (- (acos a))
* [misc]backup-simplify:  Simplify (- 0) into 0
* [misc]backup-simplify:  Simplify (- (acos a)) into (- (acos a))
* [misc]backup-simplify:  Simplify (- 0) into 0
* [misc]backup-simplify:  Simplify (- (acos a)) into (- (acos a))
* [misc]backup-simplify:  Simplify (- 0) into 0
* [misc]backup-simplify:  Simplify (- (acos a)) into (- (acos a))
* [misc]backup-simplify:  Simplify (- 0) into 0
* [misc]backup-simplify:  Simplify (- (acos a)) into (- (acos a))
* [misc]backup-simplify:  Simplify (- (+ (* (/ -1 (acos a)) (/ 0 (- (acos a)))) (* 0 (/ 0 (- (acos a)))) (* 0 (/ 0 (- (acos a)))) (* 0 (/ 0 (- (acos a)))) (* 0 (/ 0 (- (acos a)))) (* 0 (/ 0 (- (acos a)))))) into 0
* [misc]backup-simplify:  Simplify 0 into 0
* [misc]backup-simplify:  Simplify (/ -1 (acos a)) into (/ -1 (acos a))
* [misc]approximate:  Taking taylor expansion of (/ 1 (- (acos (/ 1 a)))) in (a) around 0
* [misc]taylor:  Taking taylor expansion of (/ 1 (- (acos (/ 1 a)))) in a
* [misc]taylor:  Taking taylor expansion of (- (acos (/ 1 a))) in a
* [misc]taylor:  Taking taylor expansion of (acos (/ 1 a)) in a
* [misc]backup-simplify:  Simplify (acos (/ 1 a)) into (acos (/ 1 a))
* [misc]backup-simplify:  Simplify (- (acos (/ 1 a))) into (- (acos (/ 1 a)))
* [misc]backup-simplify:  Simplify (- (acos (/ 1 a))) into (- (acos (/ 1 a)))
* [misc]backup-simplify:  Simplify (/ 1 (- (acos (/ 1 a)))) into (/ -1 (acos (/ 1 a)))
* [misc]taylor:  Taking taylor expansion of (/ 1 (- (acos (/ 1 a)))) in a
* [misc]taylor:  Taking taylor expansion of (- (acos (/ 1 a))) in a
* [misc]taylor:  Taking taylor expansion of (acos (/ 1 a)) in a
* [misc]backup-simplify:  Simplify (acos (/ 1 a)) into (acos (/ 1 a))
* [misc]backup-simplify:  Simplify (- (acos (/ 1 a))) into (- (acos (/ 1 a)))
* [misc]backup-simplify:  Simplify (- (acos (/ 1 a))) into (- (acos (/ 1 a)))
* [misc]backup-simplify:  Simplify (/ 1 (- (acos (/ 1 a)))) into (/ -1 (acos (/ 1 a)))
* [misc]backup-simplify:  Simplify (/ -1 (acos (/ 1 a))) into (/ -1 (acos (/ 1 a)))
* [misc]backup-simplify:  Simplify (- 0) into 0
* [misc]backup-simplify:  Simplify (- (acos (/ 1 a))) into (- (acos (/ 1 a)))
* [misc]backup-simplify:  Simplify (- (+ (* (/ -1 (acos (/ 1 a))) (/ 0 (- (acos (/ 1 a))))))) into 0
* [misc]backup-simplify:  Simplify 0 into 0
* [misc]backup-simplify:  Simplify (- 0) into 0
* [misc]backup-simplify:  Simplify (- (acos (/ 1 a))) into (- (acos (/ 1 a)))
* [misc]backup-simplify:  Simplify (- 0) into 0
* [misc]backup-simplify:  Simplify (- (acos (/ 1 a))) into (- (acos (/ 1 a)))
* [misc]backup-simplify:  Simplify (- (+ (* (/ -1 (acos (/ 1 a))) (/ 0 (- (acos (/ 1 a))))) (* 0 (/ 0 (- (acos (/ 1 a))))))) into 0
* [misc]backup-simplify:  Simplify 0 into 0
* [misc]backup-simplify:  Simplify (- 0) into 0
* [misc]backup-simplify:  Simplify (- (acos (/ 1 a))) into (- (acos (/ 1 a)))
* [misc]backup-simplify:  Simplify (- 0) into 0
* [misc]backup-simplify:  Simplify (- (acos (/ 1 a))) into (- (acos (/ 1 a)))
* [misc]backup-simplify:  Simplify (- 0) into 0
* [misc]backup-simplify:  Simplify (- (acos (/ 1 a))) into (- (acos (/ 1 a)))
* [misc]backup-simplify:  Simplify (- (+ (* (/ -1 (acos (/ 1 a))) (/ 0 (- (acos (/ 1 a))))) (* 0 (/ 0 (- (acos (/ 1 a))))) (* 0 (/ 0 (- (acos (/ 1 a))))))) into 0
* [misc]backup-simplify:  Simplify 0 into 0
* [misc]backup-simplify:  Simplify (- 0) into 0
* [misc]backup-simplify:  Simplify (- (acos (/ 1 a))) into (- (acos (/ 1 a)))
* [misc]backup-simplify:  Simplify (- 0) into 0
* [misc]backup-simplify:  Simplify (- (acos (/ 1 a))) into (- (acos (/ 1 a)))
* [misc]backup-simplify:  Simplify (- 0) into 0
* [misc]backup-simplify:  Simplify (- (acos (/ 1 a))) into (- (acos (/ 1 a)))
* [misc]backup-simplify:  Simplify (- 0) into 0
* [misc]backup-simplify:  Simplify (- (acos (/ 1 a))) into (- (acos (/ 1 a)))
* [misc]backup-simplify:  Simplify (- (+ (* (/ -1 (acos (/ 1 a))) (/ 0 (- (acos (/ 1 a))))) (* 0 (/ 0 (- (acos (/ 1 a))))) (* 0 (/ 0 (- (acos (/ 1 a))))) (* 0 (/ 0 (- (acos (/ 1 a))))))) into 0
* [misc]backup-simplify:  Simplify 0 into 0
* [misc]backup-simplify:  Simplify (- 0) into 0
* [misc]backup-simplify:  Simplify (- (acos (/ 1 a))) into (- (acos (/ 1 a)))
* [misc]backup-simplify:  Simplify (- 0) into 0
* [misc]backup-simplify:  Simplify (- (acos (/ 1 a))) into (- (acos (/ 1 a)))
* [misc]backup-simplify:  Simplify (- 0) into 0
* [misc]backup-simplify:  Simplify (- (acos (/ 1 a))) into (- (acos (/ 1 a)))
* [misc]backup-simplify:  Simplify (- 0) into 0
* [misc]backup-simplify:  Simplify (- (acos (/ 1 a))) into (- (acos (/ 1 a)))
* [misc]backup-simplify:  Simplify (- 0) into 0
* [misc]backup-simplify:  Simplify (- (acos (/ 1 a))) into (- (acos (/ 1 a)))
* [misc]backup-simplify:  Simplify (- (+ (* (/ -1 (acos (/ 1 a))) (/ 0 (- (acos (/ 1 a))))) (* 0 (/ 0 (- (acos (/ 1 a))))) (* 0 (/ 0 (- (acos (/ 1 a))))) (* 0 (/ 0 (- (acos (/ 1 a))))) (* 0 (/ 0 (- (acos (/ 1 a))))))) into 0
* [misc]backup-simplify:  Simplify 0 into 0
* [misc]backup-simplify:  Simplify (- 0) into 0
* [misc]backup-simplify:  Simplify (- (acos (/ 1 a))) into (- (acos (/ 1 a)))
* [misc]backup-simplify:  Simplify (- 0) into 0
* [misc]backup-simplify:  Simplify (- (acos (/ 1 a))) into (- (acos (/ 1 a)))
* [misc]backup-simplify:  Simplify (- 0) into 0
* [misc]backup-simplify:  Simplify (- (acos (/ 1 a))) into (- (acos (/ 1 a)))
* [misc]backup-simplify:  Simplify (- 0) into 0
* [misc]backup-simplify:  Simplify (- (acos (/ 1 a))) into (- (acos (/ 1 a)))
* [misc]backup-simplify:  Simplify (- 0) into 0
* [misc]backup-simplify:  Simplify (- (acos (/ 1 a))) into (- (acos (/ 1 a)))
* [misc]backup-simplify:  Simplify (- 0) into 0
* [misc]backup-simplify:  Simplify (- (acos (/ 1 a))) into (- (acos (/ 1 a)))
* [misc]backup-simplify:  Simplify (- (+ (* (/ -1 (acos (/ 1 a))) (/ 0 (- (acos (/ 1 a))))) (* 0 (/ 0 (- (acos (/ 1 a))))) (* 0 (/ 0 (- (acos (/ 1 a))))) (* 0 (/ 0 (- (acos (/ 1 a))))) (* 0 (/ 0 (- (acos (/ 1 a))))) (* 0 (/ 0 (- (acos (/ 1 a))))))) into 0
* [misc]backup-simplify:  Simplify 0 into 0
* [misc]backup-simplify:  Simplify (/ -1 (acos (/ 1 (/ 1 a)))) into (/ -1 (acos a))
* [misc]approximate:  Taking taylor expansion of (/ 1 (- (acos (/ 1 (- a))))) in (a) around 0
* [misc]taylor:  Taking taylor expansion of (/ 1 (- (acos (/ 1 (- a))))) in a
* [misc]taylor:  Taking taylor expansion of (- (acos (/ 1 (- a)))) in a
* [misc]taylor:  Taking taylor expansion of (acos (/ 1 (- a))) in a
* [misc]backup-simplify:  Simplify (acos (/ 1 (- a))) into (acos (/ -1 a))
* [misc]backup-simplify:  Simplify (- (acos (/ -1 a))) into (- (acos (/ -1 a)))
* [misc]backup-simplify:  Simplify (- (acos (/ -1 a))) into (- (acos (/ -1 a)))
* [misc]backup-simplify:  Simplify (/ 1 (- (acos (/ -1 a)))) into (/ -1 (acos (/ -1 a)))
* [misc]taylor:  Taking taylor expansion of (/ 1 (- (acos (/ 1 (- a))))) in a
* [misc]taylor:  Taking taylor expansion of (- (acos (/ 1 (- a)))) in a
* [misc]taylor:  Taking taylor expansion of (acos (/ 1 (- a))) in a
* [misc]backup-simplify:  Simplify (acos (/ 1 (- a))) into (acos (/ -1 a))
* [misc]backup-simplify:  Simplify (- (acos (/ -1 a))) into (- (acos (/ -1 a)))
* [misc]backup-simplify:  Simplify (- (acos (/ -1 a))) into (- (acos (/ -1 a)))
* [misc]backup-simplify:  Simplify (/ 1 (- (acos (/ -1 a)))) into (/ -1 (acos (/ -1 a)))
* [misc]backup-simplify:  Simplify (/ -1 (acos (/ -1 a))) into (/ -1 (acos (/ -1 a)))
* [misc]backup-simplify:  Simplify (- 0) into 0
* [misc]backup-simplify:  Simplify (- (acos (/ -1 a))) into (- (acos (/ -1 a)))
* [misc]backup-simplify:  Simplify (- (+ (* (/ -1 (acos (/ -1 a))) (/ 0 (- (acos (/ -1 a))))))) into 0
* [misc]backup-simplify:  Simplify 0 into 0
* [misc]backup-simplify:  Simplify (- 0) into 0
* [misc]backup-simplify:  Simplify (- (acos (/ -1 a))) into (- (acos (/ -1 a)))
* [misc]backup-simplify:  Simplify (- 0) into 0
* [misc]backup-simplify:  Simplify (- (acos (/ -1 a))) into (- (acos (/ -1 a)))
* [misc]backup-simplify:  Simplify (- (+ (* (/ -1 (acos (/ -1 a))) (/ 0 (- (acos (/ -1 a))))) (* 0 (/ 0 (- (acos (/ -1 a))))))) into 0
* [misc]backup-simplify:  Simplify 0 into 0
* [misc]backup-simplify:  Simplify (- 0) into 0
* [misc]backup-simplify:  Simplify (- (acos (/ -1 a))) into (- (acos (/ -1 a)))
* [misc]backup-simplify:  Simplify (- 0) into 0
* [misc]backup-simplify:  Simplify (- (acos (/ -1 a))) into (- (acos (/ -1 a)))
* [misc]backup-simplify:  Simplify (- 0) into 0
* [misc]backup-simplify:  Simplify (- (acos (/ -1 a))) into (- (acos (/ -1 a)))
* [misc]backup-simplify:  Simplify (- (+ (* (/ -1 (acos (/ -1 a))) (/ 0 (- (acos (/ -1 a))))) (* 0 (/ 0 (- (acos (/ -1 a))))) (* 0 (/ 0 (- (acos (/ -1 a))))))) into 0
* [misc]backup-simplify:  Simplify 0 into 0
* [misc]backup-simplify:  Simplify (- 0) into 0
* [misc]backup-simplify:  Simplify (- (acos (/ -1 a))) into (- (acos (/ -1 a)))
* [misc]backup-simplify:  Simplify (- 0) into 0
* [misc]backup-simplify:  Simplify (- (acos (/ -1 a))) into (- (acos (/ -1 a)))
* [misc]backup-simplify:  Simplify (- 0) into 0
* [misc]backup-simplify:  Simplify (- (acos (/ -1 a))) into (- (acos (/ -1 a)))
* [misc]backup-simplify:  Simplify (- 0) into 0
* [misc]backup-simplify:  Simplify (- (acos (/ -1 a))) into (- (acos (/ -1 a)))
* [misc]backup-simplify:  Simplify (- (+ (* (/ -1 (acos (/ -1 a))) (/ 0 (- (acos (/ -1 a))))) (* 0 (/ 0 (- (acos (/ -1 a))))) (* 0 (/ 0 (- (acos (/ -1 a))))) (* 0 (/ 0 (- (acos (/ -1 a))))))) into 0
* [misc]backup-simplify:  Simplify 0 into 0
* [misc]backup-simplify:  Simplify (- 0) into 0
* [misc]backup-simplify:  Simplify (- (acos (/ -1 a))) into (- (acos (/ -1 a)))
* [misc]backup-simplify:  Simplify (- 0) into 0
* [misc]backup-simplify:  Simplify (- (acos (/ -1 a))) into (- (acos (/ -1 a)))
* [misc]backup-simplify:  Simplify (- 0) into 0
* [misc]backup-simplify:  Simplify (- (acos (/ -1 a))) into (- (acos (/ -1 a)))
* [misc]backup-simplify:  Simplify (- 0) into 0
* [misc]backup-simplify:  Simplify (- (acos (/ -1 a))) into (- (acos (/ -1 a)))
* [misc]backup-simplify:  Simplify (- 0) into 0
* [misc]backup-simplify:  Simplify (- (acos (/ -1 a))) into (- (acos (/ -1 a)))
* [misc]backup-simplify:  Simplify (- (+ (* (/ -1 (acos (/ -1 a))) (/ 0 (- (acos (/ -1 a))))) (* 0 (/ 0 (- (acos (/ -1 a))))) (* 0 (/ 0 (- (acos (/ -1 a))))) (* 0 (/ 0 (- (acos (/ -1 a))))) (* 0 (/ 0 (- (acos (/ -1 a))))))) into 0
* [misc]backup-simplify:  Simplify 0 into 0
* [misc]backup-simplify:  Simplify (- 0) into 0
* [misc]backup-simplify:  Simplify (- (acos (/ -1 a))) into (- (acos (/ -1 a)))
* [misc]backup-simplify:  Simplify (- 0) into 0
* [misc]backup-simplify:  Simplify (- (acos (/ -1 a))) into (- (acos (/ -1 a)))
* [misc]backup-simplify:  Simplify (- 0) into 0
* [misc]backup-simplify:  Simplify (- (acos (/ -1 a))) into (- (acos (/ -1 a)))
* [misc]backup-simplify:  Simplify (- 0) into 0
* [misc]backup-simplify:  Simplify (- (acos (/ -1 a))) into (- (acos (/ -1 a)))
* [misc]backup-simplify:  Simplify (- 0) into 0
* [misc]backup-simplify:  Simplify (- (acos (/ -1 a))) into (- (acos (/ -1 a)))
* [misc]backup-simplify:  Simplify (- 0) into 0
* [misc]backup-simplify:  Simplify (- (acos (/ -1 a))) into (- (acos (/ -1 a)))
* [misc]backup-simplify:  Simplify (- (+ (* (/ -1 (acos (/ -1 a))) (/ 0 (- (acos (/ -1 a))))) (* 0 (/ 0 (- (acos (/ -1 a))))) (* 0 (/ 0 (- (acos (/ -1 a))))) (* 0 (/ 0 (- (acos (/ -1 a))))) (* 0 (/ 0 (- (acos (/ -1 a))))) (* 0 (/ 0 (- (acos (/ -1 a))))))) into 0
* [misc]backup-simplify:  Simplify 0 into 0
* [misc]backup-simplify:  Simplify (/ -1 (acos (/ -1 (/ 1 (- a))))) into (/ -1 (acos a))
* * * [misc]progress:  simplifying candidates
* * * * [misc]progress:  [ 1 / 72 ] simplifiying candidate #<alt (λ (a) (log1p (expm1 (/ (/ 1 (- (acos a))) (/ 1 a)))))>
* * * * [misc]progress:  [ 2 / 72 ] simplifiying candidate #<alt (λ (a) (expm1 (log1p (/ (/ 1 (- (acos a))) (/ 1 a)))))>
* * * * [misc]progress:  [ 3 / 72 ] simplifiying candidate #<alt (λ (a) (pow (/ (/ 1 (- (acos a))) (/ 1 a)) 1))>
* * * * [misc]progress:  [ 4 / 72 ] simplifiying candidate #<alt (λ (a) (exp (- (- (log (- (acos a)))) (log (/ 1 a)))))>
* [enter]simplify:  Simplifying (- (- (log (- (acos a)))) (log (/ 1 a)))
* * [misc]simplify:  iters left: 6 (9 enodes)
* * [misc]simplify:  iters left: 5 (17 enodes)
* * [misc]simplify:  iters left: 4 (24 enodes)
* * [misc]simplify:  iters left: 3 (30 enodes)
* * [misc]simplify:  iters left: 2 (49 enodes)
* * [misc]simplify:  iters left: 1 (120 enodes)
* [exit]simplify:  Simplified to (- (log a) (log (- (acos a))))
* [misc]simplify:  Simplified (2 1) to (λ (a) (exp (- (log a) (log (- (acos a))))))
* * * * [misc]progress:  [ 5 / 72 ] simplifiying candidate #<alt (λ (a) (exp (- (log (/ 1 (- (acos a)))) (log (/ 1 a)))))>
* [enter]simplify:  Simplifying (- (log (/ 1 (- (acos a)))) (log (/ 1 a)))
* * [misc]simplify:  iters left: 6 (9 enodes)
* * [misc]simplify:  iters left: 5 (20 enodes)
* * [misc]simplify:  iters left: 4 (31 enodes)
* * [misc]simplify:  iters left: 3 (51 enodes)
* * [misc]simplify:  iters left: 2 (117 enodes)
* [exit]simplify:  Simplified to (- (log a) (log (- (acos a))))
* [misc]simplify:  Simplified (2 1) to (λ (a) (exp (- (log a) (log (- (acos a))))))
* * * * [misc]progress:  [ 6 / 72 ] simplifiying candidate #<alt (λ (a) (exp (log (/ (/ 1 (- (acos a))) (/ 1 a)))))>
* * * * [misc]progress:  [ 7 / 72 ] simplifiying candidate #<alt (λ (a) (log (exp (/ (/ 1 (- (acos a))) (/ 1 a)))))>
* * * * [misc]progress:  [ 8 / 72 ] simplifiying candidate #<alt (λ (a) (cbrt (/ (* (* (/ 1 (- (acos a))) (/ 1 (- (acos a)))) (/ 1 (- (acos a)))) (* (* (/ 1 a) (/ 1 a)) (/ 1 a)))))>
* [enter]simplify:  Simplifying (/ (* (* (/ 1 (- (acos a))) (/ 1 (- (acos a)))) (/ 1 (- (acos a)))) (* (* (/ 1 a) (/ 1 a)) (/ 1 a)))
* * [misc]simplify:  iters left: 6 (11 enodes)
* * [misc]simplify:  iters left: 5 (34 enodes)
* * [misc]simplify:  iters left: 4 (100 enodes)
* * [misc]simplify:  iters left: 3 (417 enodes)
* [exit]simplify:  Simplified to (pow (/ a (- (acos a))) 3)
* [misc]simplify:  Simplified (2 1) to (λ (a) (cbrt (pow (/ a (- (acos a))) 3)))
* * * * [misc]progress:  [ 9 / 72 ] simplifiying candidate #<alt (λ (a) (* (* (cbrt (/ (/ 1 (- (acos a))) (/ 1 a))) (cbrt (/ (/ 1 (- (acos a))) (/ 1 a)))) (cbrt (/ (/ 1 (- (acos a))) (/ 1 a)))))>
* * * * [misc]progress:  [ 10 / 72 ] simplifiying candidate #<alt (λ (a) (cbrt (* (* (/ (/ 1 (- (acos a))) (/ 1 a)) (/ (/ 1 (- (acos a))) (/ 1 a))) (/ (/ 1 (- (acos a))) (/ 1 a)))))>
* * * * [misc]progress:  [ 11 / 72 ] simplifiying candidate #<alt (λ (a) (* (sqrt (/ (/ 1 (- (acos a))) (/ 1 a))) (sqrt (/ (/ 1 (- (acos a))) (/ 1 a)))))>
* * * * [misc]progress:  [ 12 / 72 ] simplifiying candidate #<alt (λ (a) (/ (- (/ 1 (- (acos a)))) (- (/ 1 a))))>
* * * * [misc]progress:  [ 13 / 72 ] simplifiying candidate #<alt (λ (a) (* (/ (* (cbrt (/ 1 (- (acos a)))) (cbrt (/ 1 (- (acos a))))) (* (cbrt (/ 1 a)) (cbrt (/ 1 a)))) (/ (cbrt (/ 1 (- (acos a)))) (cbrt (/ 1 a)))))>
* [enter]simplify:  Simplifying (/ (* (cbrt (/ 1 (- (acos a)))) (cbrt (/ 1 (- (acos a))))) (* (cbrt (/ 1 a)) (cbrt (/ 1 a))))
* * [misc]simplify:  iters left: 6 (11 enodes)
* * [misc]simplify:  iters left: 5 (19 enodes)
* * [misc]simplify:  iters left: 4 (28 enodes)
* * [misc]simplify:  iters left: 3 (31 enodes)
* * [misc]simplify:  iters left: 2 (34 enodes)
* [exit]simplify:  Simplified to (* (/ (cbrt (/ 1 (- (acos a)))) (cbrt (/ 1 a))) (/ (cbrt (/ 1 (- (acos a)))) (cbrt (/ 1 a))))
* [misc]simplify:  Simplified (2 1) to (λ (a) (* (* (/ (cbrt (/ 1 (- (acos a)))) (cbrt (/ 1 a))) (/ (cbrt (/ 1 (- (acos a)))) (cbrt (/ 1 a)))) (/ (cbrt (/ 1 (- (acos a)))) (cbrt (/ 1 a)))))
* [enter]simplify:  Simplifying (/ (cbrt (/ 1 (- (acos a)))) (cbrt (/ 1 a)))
* * [misc]simplify:  iters left: 6 (9 enodes)
* * [misc]simplify:  iters left: 5 (11 enodes)
* [exit]simplify:  Simplified to (/ (cbrt (/ 1 (- (acos a)))) (cbrt (/ 1 a)))
* [misc]simplify:  Simplified (2 2) to (λ (a) (* (/ (* (cbrt (/ 1 (- (acos a)))) (cbrt (/ 1 (- (acos a))))) (* (cbrt (/ 1 a)) (cbrt (/ 1 a)))) (/ (cbrt (/ 1 (- (acos a)))) (cbrt (/ 1 a)))))
* * * * [misc]progress:  [ 14 / 72 ] simplifiying candidate #<alt (λ (a) (* (/ (* (cbrt (/ 1 (- (acos a)))) (cbrt (/ 1 (- (acos a))))) (sqrt (/ 1 a))) (/ (cbrt (/ 1 (- (acos a)))) (sqrt (/ 1 a)))))>
* [enter]simplify:  Simplifying (/ (* (cbrt (/ 1 (- (acos a)))) (cbrt (/ 1 (- (acos a))))) (sqrt (/ 1 a)))
* * [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 (17 enodes)
* [exit]simplify:  Simplified to (* (/ (cbrt (/ 1 (- (acos a)))) (sqrt (/ 1 a))) (cbrt (/ 1 (- (acos a)))))
* [misc]simplify:  Simplified (2 1) to (λ (a) (* (* (/ (cbrt (/ 1 (- (acos a)))) (sqrt (/ 1 a))) (cbrt (/ 1 (- (acos a))))) (/ (cbrt (/ 1 (- (acos a)))) (sqrt (/ 1 a)))))
* [enter]simplify:  Simplifying (/ (cbrt (/ 1 (- (acos a)))) (sqrt (/ 1 a)))
* * [misc]simplify:  iters left: 6 (9 enodes)
* * [misc]simplify:  iters left: 5 (11 enodes)
* [exit]simplify:  Simplified to (/ (cbrt (/ 1 (- (acos a)))) (sqrt (/ 1 a)))
* [misc]simplify:  Simplified (2 2) to (λ (a) (* (/ (* (cbrt (/ 1 (- (acos a)))) (cbrt (/ 1 (- (acos a))))) (sqrt (/ 1 a))) (/ (cbrt (/ 1 (- (acos a)))) (sqrt (/ 1 a)))))
* * * * [misc]progress:  [ 15 / 72 ] simplifiying candidate #<alt (λ (a) (* (/ (* (cbrt (/ 1 (- (acos a)))) (cbrt (/ 1 (- (acos a))))) 1) (/ (cbrt (/ 1 (- (acos a)))) (/ 1 a))))>
* [enter]simplify:  Simplifying (/ (* (cbrt (/ 1 (- (acos a)))) (cbrt (/ 1 (- (acos a))))) 1)
* * [misc]simplify:  iters left: 6 (8 enodes)
* * [misc]simplify:  iters left: 5 (12 enodes)
* * [misc]simplify:  iters left: 4 (18 enodes)
* * [misc]simplify:  iters left: 3 (23 enodes)
* * [misc]simplify:  iters left: 2 (28 enodes)
* [exit]simplify:  Simplified to (* (cbrt (/ 1 (- (acos a)))) (cbrt (/ 1 (- (acos a)))))
* [misc]simplify:  Simplified (2 1) to (λ (a) (* (* (cbrt (/ 1 (- (acos a)))) (cbrt (/ 1 (- (acos a))))) (/ (cbrt (/ 1 (- (acos a)))) (/ 1 a))))
* [enter]simplify:  Simplifying (/ (cbrt (/ 1 (- (acos a)))) (/ 1 a))
* * [misc]simplify:  iters left: 6 (8 enodes)
* * [misc]simplify:  iters left: 5 (12 enodes)
* * [misc]simplify:  iters left: 4 (15 enodes)
* * [misc]simplify:  iters left: 3 (25 enodes)
* * [misc]simplify:  iters left: 2 (27 enodes)
* * [misc]simplify:  iters left: 1 (32 enodes)
* [exit]simplify:  Simplified to (* (cbrt (/ 1 (- (acos a)))) a)
* [misc]simplify:  Simplified (2 2) to (λ (a) (* (* (cbrt (/ 1 (- (acos a)))) (cbrt (/ 1 (- (acos a))))) (* (cbrt (/ 1 (- (acos a)))) a)))
* * * * [misc]progress:  [ 16 / 72 ] simplifiying candidate #<alt (λ (a) (* (/ (* (cbrt (/ 1 (- (acos a)))) (cbrt (/ 1 (- (acos a))))) 1) (/ (cbrt (/ 1 (- (acos a)))) (/ 1 a))))>
* [enter]simplify:  Simplifying (/ (* (cbrt (/ 1 (- (acos a)))) (cbrt (/ 1 (- (acos a))))) 1)
* * [misc]simplify:  iters left: 6 (8 enodes)
* * [misc]simplify:  iters left: 5 (12 enodes)
* * [misc]simplify:  iters left: 4 (18 enodes)
* * [misc]simplify:  iters left: 3 (23 enodes)
* * [misc]simplify:  iters left: 2 (28 enodes)
* [exit]simplify:  Simplified to (* (cbrt (/ 1 (- (acos a)))) (cbrt (/ 1 (- (acos a)))))
* [misc]simplify:  Simplified (2 1) to (λ (a) (* (* (cbrt (/ 1 (- (acos a)))) (cbrt (/ 1 (- (acos a))))) (/ (cbrt (/ 1 (- (acos a)))) (/ 1 a))))
* [enter]simplify:  Simplifying (/ (cbrt (/ 1 (- (acos a)))) (/ 1 a))
* * [misc]simplify:  iters left: 6 (8 enodes)
* * [misc]simplify:  iters left: 5 (12 enodes)
* * [misc]simplify:  iters left: 4 (15 enodes)
* * [misc]simplify:  iters left: 3 (25 enodes)
* * [misc]simplify:  iters left: 2 (27 enodes)
* * [misc]simplify:  iters left: 1 (32 enodes)
* [exit]simplify:  Simplified to (* (cbrt (/ 1 (- (acos a)))) a)
* [misc]simplify:  Simplified (2 2) to (λ (a) (* (* (cbrt (/ 1 (- (acos a)))) (cbrt (/ 1 (- (acos a))))) (* (cbrt (/ 1 (- (acos a)))) a)))
* * * * [misc]progress:  [ 17 / 72 ] simplifiying candidate #<alt (λ (a) (* (/ (sqrt (/ 1 (- (acos a)))) (* (cbrt (/ 1 a)) (cbrt (/ 1 a)))) (/ (sqrt (/ 1 (- (acos a)))) (cbrt (/ 1 a)))))>
* [enter]simplify:  Simplifying (/ (sqrt (/ 1 (- (acos a)))) (* (cbrt (/ 1 a)) (cbrt (/ 1 a))))
* * [misc]simplify:  iters left: 6 (10 enodes)
* * [misc]simplify:  iters left: 5 (14 enodes)
* [exit]simplify:  Simplified to (/ (sqrt (/ 1 (- (acos a)))) (* (cbrt (/ 1 a)) (cbrt (/ 1 a))))
* [misc]simplify:  Simplified (2 1) to (λ (a) (* (/ (sqrt (/ 1 (- (acos a)))) (* (cbrt (/ 1 a)) (cbrt (/ 1 a)))) (/ (sqrt (/ 1 (- (acos a)))) (cbrt (/ 1 a)))))
* [enter]simplify:  Simplifying (/ (sqrt (/ 1 (- (acos a)))) (cbrt (/ 1 a)))
* * [misc]simplify:  iters left: 6 (9 enodes)
* * [misc]simplify:  iters left: 5 (11 enodes)
* [exit]simplify:  Simplified to (/ (sqrt (/ 1 (- (acos a)))) (cbrt (/ 1 a)))
* [misc]simplify:  Simplified (2 2) to (λ (a) (* (/ (sqrt (/ 1 (- (acos a)))) (* (cbrt (/ 1 a)) (cbrt (/ 1 a)))) (/ (sqrt (/ 1 (- (acos a)))) (cbrt (/ 1 a)))))
* * * * [misc]progress:  [ 18 / 72 ] simplifiying candidate #<alt (λ (a) (* (/ (sqrt (/ 1 (- (acos a)))) (sqrt (/ 1 a))) (/ (sqrt (/ 1 (- (acos a)))) (sqrt (/ 1 a)))))>
* [enter]simplify:  Simplifying (/ (sqrt (/ 1 (- (acos a)))) (sqrt (/ 1 a)))
* * [misc]simplify:  iters left: 6 (9 enodes)
* * [misc]simplify:  iters left: 5 (11 enodes)
* [exit]simplify:  Simplified to (/ (sqrt (/ 1 (- (acos a)))) (sqrt (/ 1 a)))
* [misc]simplify:  Simplified (2 1) to (λ (a) (* (/ (sqrt (/ 1 (- (acos a)))) (sqrt (/ 1 a))) (/ (sqrt (/ 1 (- (acos a)))) (sqrt (/ 1 a)))))
* [enter]simplify:  Simplifying (/ (sqrt (/ 1 (- (acos a)))) (sqrt (/ 1 a)))
* * [misc]simplify:  iters left: 6 (9 enodes)
* * [misc]simplify:  iters left: 5 (11 enodes)
* [exit]simplify:  Simplified to (/ (sqrt (/ 1 (- (acos a)))) (sqrt (/ 1 a)))
* [misc]simplify:  Simplified (2 2) to (λ (a) (* (/ (sqrt (/ 1 (- (acos a)))) (sqrt (/ 1 a))) (/ (sqrt (/ 1 (- (acos a)))) (sqrt (/ 1 a)))))
* * * * [misc]progress:  [ 19 / 72 ] simplifiying candidate #<alt (λ (a) (* (/ (sqrt (/ 1 (- (acos a)))) 1) (/ (sqrt (/ 1 (- (acos a)))) (/ 1 a))))>
* [enter]simplify:  Simplifying (/ (sqrt (/ 1 (- (acos a)))) 1)
* * [misc]simplify:  iters left: 6 (7 enodes)
* * [misc]simplify:  iters left: 5 (9 enodes)
* * [misc]simplify:  iters left: 4 (11 enodes)
* [exit]simplify:  Simplified to (sqrt (/ 1 (- (acos a))))
* [misc]simplify:  Simplified (2 1) to (λ (a) (* (sqrt (/ 1 (- (acos a)))) (/ (sqrt (/ 1 (- (acos a)))) (/ 1 a))))
* [enter]simplify:  Simplifying (/ (sqrt (/ 1 (- (acos a)))) (/ 1 a))
* * [misc]simplify:  iters left: 6 (8 enodes)
* * [misc]simplify:  iters left: 5 (12 enodes)
* * [misc]simplify:  iters left: 4 (15 enodes)
* * [misc]simplify:  iters left: 3 (25 enodes)
* * [misc]simplify:  iters left: 2 (27 enodes)
* * [misc]simplify:  iters left: 1 (32 enodes)
* [exit]simplify:  Simplified to (* (sqrt (/ 1 (- (acos a)))) a)
* [misc]simplify:  Simplified (2 2) to (λ (a) (* (sqrt (/ 1 (- (acos a)))) (* (sqrt (/ 1 (- (acos a)))) a)))
* * * * [misc]progress:  [ 20 / 72 ] simplifiying candidate #<alt (λ (a) (* (/ (sqrt (/ 1 (- (acos a)))) 1) (/ (sqrt (/ 1 (- (acos a)))) (/ 1 a))))>
* [enter]simplify:  Simplifying (/ (sqrt (/ 1 (- (acos a)))) 1)
* * [misc]simplify:  iters left: 6 (7 enodes)
* * [misc]simplify:  iters left: 5 (9 enodes)
* * [misc]simplify:  iters left: 4 (11 enodes)
* [exit]simplify:  Simplified to (sqrt (/ 1 (- (acos a))))
* [misc]simplify:  Simplified (2 1) to (λ (a) (* (sqrt (/ 1 (- (acos a)))) (/ (sqrt (/ 1 (- (acos a)))) (/ 1 a))))
* [enter]simplify:  Simplifying (/ (sqrt (/ 1 (- (acos a)))) (/ 1 a))
* * [misc]simplify:  iters left: 6 (8 enodes)
* * [misc]simplify:  iters left: 5 (12 enodes)
* * [misc]simplify:  iters left: 4 (15 enodes)
* * [misc]simplify:  iters left: 3 (25 enodes)
* * [misc]simplify:  iters left: 2 (27 enodes)
* * [misc]simplify:  iters left: 1 (32 enodes)
* [exit]simplify:  Simplified to (* (sqrt (/ 1 (- (acos a)))) a)
* [misc]simplify:  Simplified (2 2) to (λ (a) (* (sqrt (/ 1 (- (acos a)))) (* (sqrt (/ 1 (- (acos a)))) a)))
* * * * [misc]progress:  [ 21 / 72 ] simplifiying candidate #<alt (λ (a) (* (/ 1 (* (cbrt (/ 1 a)) (cbrt (/ 1 a)))) (/ (/ 1 (- (acos a))) (cbrt (/ 1 a)))))>
* [enter]simplify:  Simplifying (/ 1 (* (cbrt (/ 1 a)) (cbrt (/ 1 a))))
* * [misc]simplify:  iters left: 6 (6 enodes)
* * [misc]simplify:  iters left: 5 (10 enodes)
* [exit]simplify:  Simplified to (/ (/ 1 (cbrt (/ 1 a))) (cbrt (/ 1 a)))
* [misc]simplify:  Simplified (2 1) to (λ (a) (* (/ (/ 1 (cbrt (/ 1 a))) (cbrt (/ 1 a))) (/ (/ 1 (- (acos a))) (cbrt (/ 1 a)))))
* [enter]simplify:  Simplifying (/ (/ 1 (- (acos a))) (cbrt (/ 1 a)))
* * [misc]simplify:  iters left: 6 (8 enodes)
* * [misc]simplify:  iters left: 5 (12 enodes)
* * [misc]simplify:  iters left: 4 (17 enodes)
* * [misc]simplify:  iters left: 3 (21 enodes)
* * [misc]simplify:  iters left: 2 (22 enodes)
* [exit]simplify:  Simplified to (/ (/ 1 (cbrt (/ 1 a))) (- (acos a)))
* [misc]simplify:  Simplified (2 2) to (λ (a) (* (/ 1 (* (cbrt (/ 1 a)) (cbrt (/ 1 a)))) (/ (/ 1 (cbrt (/ 1 a))) (- (acos a)))))
* * * * [misc]progress:  [ 22 / 72 ] simplifiying candidate #<alt (λ (a) (* (/ 1 (sqrt (/ 1 a))) (/ (/ 1 (- (acos a))) (sqrt (/ 1 a)))))>
* [enter]simplify:  Simplifying (/ 1 (sqrt (/ 1 a)))
* * [misc]simplify:  iters left: 5 (5 enodes)
* * [misc]simplify:  iters left: 4 (7 enodes)
* [exit]simplify:  Simplified to (/ 1 (sqrt (/ 1 a)))
* [misc]simplify:  Simplified (2 1) to (λ (a) (* (/ 1 (sqrt (/ 1 a))) (/ (/ 1 (- (acos a))) (sqrt (/ 1 a)))))
* [enter]simplify:  Simplifying (/ (/ 1 (- (acos a))) (sqrt (/ 1 a)))
* * [misc]simplify:  iters left: 6 (8 enodes)
* * [misc]simplify:  iters left: 5 (12 enodes)
* * [misc]simplify:  iters left: 4 (17 enodes)
* * [misc]simplify:  iters left: 3 (21 enodes)
* * [misc]simplify:  iters left: 2 (22 enodes)
* [exit]simplify:  Simplified to (/ (/ 1 (sqrt (/ 1 a))) (- (acos a)))
* [misc]simplify:  Simplified (2 2) to (λ (a) (* (/ 1 (sqrt (/ 1 a))) (/ (/ 1 (sqrt (/ 1 a))) (- (acos a)))))
* * * * [misc]progress:  [ 23 / 72 ] simplifiying candidate #<alt (λ (a) (* (/ 1 1) (/ (/ 1 (- (acos a))) (/ 1 a))))>
* [enter]simplify:  Simplifying (/ 1 1)
* * [misc]simplify:  iters left: 2 (2 enodes)
* * [misc]simplify:  iters left: 1 (4 enodes)
* [exit]simplify:  Simplified to 1
* [misc]simplify:  Simplified (2 1) to (λ (a) (* 1 (/ (/ 1 (- (acos a))) (/ 1 a))))
* [enter]simplify:  Simplifying (/ (/ 1 (- (acos a))) (/ 1 a))
* * [misc]simplify:  iters left: 6 (7 enodes)
* * [misc]simplify:  iters left: 5 (13 enodes)
* * [misc]simplify:  iters left: 4 (26 enodes)
* * [misc]simplify:  iters left: 3 (42 enodes)
* * [misc]simplify:  iters left: 2 (76 enodes)
* * [misc]simplify:  iters left: 1 (111 enodes)
* [exit]simplify:  Simplified to (/ a (- (acos a)))
* [misc]simplify:  Simplified (2 2) to (λ (a) (* 1 (/ a (- (acos a)))))
* * * * [misc]progress:  [ 24 / 72 ] simplifiying candidate #<alt (λ (a) (* (/ 1 1) (/ (/ 1 (- (acos a))) (/ 1 a))))>
* [enter]simplify:  Simplifying (/ 1 1)
* * [misc]simplify:  iters left: 2 (2 enodes)
* * [misc]simplify:  iters left: 1 (4 enodes)
* [exit]simplify:  Simplified to 1
* [misc]simplify:  Simplified (2 1) to (λ (a) (* 1 (/ (/ 1 (- (acos a))) (/ 1 a))))
* [enter]simplify:  Simplifying (/ (/ 1 (- (acos a))) (/ 1 a))
* * [misc]simplify:  iters left: 6 (7 enodes)
* * [misc]simplify:  iters left: 5 (13 enodes)
* * [misc]simplify:  iters left: 4 (26 enodes)
* * [misc]simplify:  iters left: 3 (42 enodes)
* * [misc]simplify:  iters left: 2 (76 enodes)
* * [misc]simplify:  iters left: 1 (111 enodes)
* [exit]simplify:  Simplified to (/ a (- (acos a)))
* [misc]simplify:  Simplified (2 2) to (λ (a) (* 1 (/ a (- (acos a)))))
* * * * [misc]progress:  [ 25 / 72 ] simplifiying candidate #<alt (λ (a) (* (/ 1 (* (cbrt (/ 1 a)) (cbrt (/ 1 a)))) (/ (/ 1 (- (acos a))) (cbrt (/ 1 a)))))>
* [enter]simplify:  Simplifying (/ 1 (* (cbrt (/ 1 a)) (cbrt (/ 1 a))))
* * [misc]simplify:  iters left: 6 (6 enodes)
* * [misc]simplify:  iters left: 5 (10 enodes)
* [exit]simplify:  Simplified to (/ (/ 1 (cbrt (/ 1 a))) (cbrt (/ 1 a)))
* [misc]simplify:  Simplified (2 1) to (λ (a) (* (/ (/ 1 (cbrt (/ 1 a))) (cbrt (/ 1 a))) (/ (/ 1 (- (acos a))) (cbrt (/ 1 a)))))
* [enter]simplify:  Simplifying (/ (/ 1 (- (acos a))) (cbrt (/ 1 a)))
* * [misc]simplify:  iters left: 6 (8 enodes)
* * [misc]simplify:  iters left: 5 (12 enodes)
* * [misc]simplify:  iters left: 4 (17 enodes)
* * [misc]simplify:  iters left: 3 (21 enodes)
* * [misc]simplify:  iters left: 2 (22 enodes)
* [exit]simplify:  Simplified to (/ (/ 1 (cbrt (/ 1 a))) (- (acos a)))
* [misc]simplify:  Simplified (2 2) to (λ (a) (* (/ 1 (* (cbrt (/ 1 a)) (cbrt (/ 1 a)))) (/ (/ 1 (cbrt (/ 1 a))) (- (acos a)))))
* * * * [misc]progress:  [ 26 / 72 ] simplifiying candidate #<alt (λ (a) (* (/ 1 (sqrt (/ 1 a))) (/ (/ 1 (- (acos a))) (sqrt (/ 1 a)))))>
* [enter]simplify:  Simplifying (/ 1 (sqrt (/ 1 a)))
* * [misc]simplify:  iters left: 5 (5 enodes)
* * [misc]simplify:  iters left: 4 (7 enodes)
* [exit]simplify:  Simplified to (/ 1 (sqrt (/ 1 a)))
* [misc]simplify:  Simplified (2 1) to (λ (a) (* (/ 1 (sqrt (/ 1 a))) (/ (/ 1 (- (acos a))) (sqrt (/ 1 a)))))
* [enter]simplify:  Simplifying (/ (/ 1 (- (acos a))) (sqrt (/ 1 a)))
* * [misc]simplify:  iters left: 6 (8 enodes)
* * [misc]simplify:  iters left: 5 (12 enodes)
* * [misc]simplify:  iters left: 4 (17 enodes)
* * [misc]simplify:  iters left: 3 (21 enodes)
* * [misc]simplify:  iters left: 2 (22 enodes)
* [exit]simplify:  Simplified to (/ (/ 1 (sqrt (/ 1 a))) (- (acos a)))
* [misc]simplify:  Simplified (2 2) to (λ (a) (* (/ 1 (sqrt (/ 1 a))) (/ (/ 1 (sqrt (/ 1 a))) (- (acos a)))))
* * * * [misc]progress:  [ 27 / 72 ] simplifiying candidate #<alt (λ (a) (* (/ 1 1) (/ (/ 1 (- (acos a))) (/ 1 a))))>
* [enter]simplify:  Simplifying (/ 1 1)
* * [misc]simplify:  iters left: 2 (2 enodes)
* * [misc]simplify:  iters left: 1 (4 enodes)
* [exit]simplify:  Simplified to 1
* [misc]simplify:  Simplified (2 1) to (λ (a) (* 1 (/ (/ 1 (- (acos a))) (/ 1 a))))
* [enter]simplify:  Simplifying (/ (/ 1 (- (acos a))) (/ 1 a))
* * [misc]simplify:  iters left: 6 (7 enodes)
* * [misc]simplify:  iters left: 5 (13 enodes)
* * [misc]simplify:  iters left: 4 (26 enodes)
* * [misc]simplify:  iters left: 3 (42 enodes)
* * [misc]simplify:  iters left: 2 (76 enodes)
* * [misc]simplify:  iters left: 1 (111 enodes)
* [exit]simplify:  Simplified to (/ a (- (acos a)))
* [misc]simplify:  Simplified (2 2) to (λ (a) (* 1 (/ a (- (acos a)))))
* * * * [misc]progress:  [ 28 / 72 ] simplifiying candidate #<alt (λ (a) (* (/ 1 1) (/ (/ 1 (- (acos a))) (/ 1 a))))>
* [enter]simplify:  Simplifying (/ 1 1)
* * [misc]simplify:  iters left: 2 (2 enodes)
* * [misc]simplify:  iters left: 1 (4 enodes)
* [exit]simplify:  Simplified to 1
* [misc]simplify:  Simplified (2 1) to (λ (a) (* 1 (/ (/ 1 (- (acos a))) (/ 1 a))))
* [enter]simplify:  Simplifying (/ (/ 1 (- (acos a))) (/ 1 a))
* * [misc]simplify:  iters left: 6 (7 enodes)
* * [misc]simplify:  iters left: 5 (13 enodes)
* * [misc]simplify:  iters left: 4 (26 enodes)
* * [misc]simplify:  iters left: 3 (42 enodes)
* * [misc]simplify:  iters left: 2 (76 enodes)
* * [misc]simplify:  iters left: 1 (111 enodes)
* [exit]simplify:  Simplified to (/ a (- (acos a)))
* [misc]simplify:  Simplified (2 2) to (λ (a) (* 1 (/ a (- (acos a)))))
* * * * [misc]progress:  [ 29 / 72 ] simplifiying candidate #<alt (λ (a) (* 1 (/ (/ 1 (- (acos a))) (/ 1 a))))>
* * * * [misc]progress:  [ 30 / 72 ] simplifiying candidate #<alt (λ (a) (* (/ 1 (- (acos a))) (/ 1 (/ 1 a))))>
* * * * [misc]progress:  [ 31 / 72 ] simplifiying candidate #<alt (λ (a) (/ 1 (/ (/ 1 a) (/ 1 (- (acos a))))))>
* * * * [misc]progress:  [ 32 / 72 ] simplifiying candidate #<alt (λ (a) (/ (/ (/ 1 (- (acos a))) (* (cbrt (/ 1 a)) (cbrt (/ 1 a)))) (cbrt (/ 1 a))))>
* [enter]simplify:  Simplifying (cbrt (/ 1 a))
* * [misc]simplify:  iters left: 3 (4 enodes)
* * [misc]simplify:  iters left: 2 (6 enodes)
* [exit]simplify:  Simplified to (cbrt (/ 1 a))
* [misc]simplify:  Simplified (2 2) to (λ (a) (/ (/ (/ 1 (- (acos a))) (* (cbrt (/ 1 a)) (cbrt (/ 1 a)))) (cbrt (/ 1 a))))
* * * * [misc]progress:  [ 33 / 72 ] simplifiying candidate #<alt (λ (a) (/ (/ (/ 1 (- (acos a))) (sqrt (/ 1 a))) (sqrt (/ 1 a))))>
* [enter]simplify:  Simplifying (sqrt (/ 1 a))
* * [misc]simplify:  iters left: 3 (4 enodes)
* * [misc]simplify:  iters left: 2 (6 enodes)
* [exit]simplify:  Simplified to (sqrt (/ 1 a))
* [misc]simplify:  Simplified (2 2) to (λ (a) (/ (/ (/ 1 (- (acos a))) (sqrt (/ 1 a))) (sqrt (/ 1 a))))
* * * * [misc]progress:  [ 34 / 72 ] simplifiying candidate #<alt (λ (a) (/ (/ (/ 1 (- (acos a))) 1) (/ 1 a)))>
* [enter]simplify:  Simplifying (/ 1 a)
* * [misc]simplify:  iters left: 2 (3 enodes)
* * [misc]simplify:  iters left: 1 (5 enodes)
* [exit]simplify:  Simplified to (/ 1 a)
* [misc]simplify:  Simplified (2 2) to (λ (a) (/ (/ (/ 1 (- (acos a))) 1) (/ 1 a)))
* * * * [misc]progress:  [ 35 / 72 ] simplifiying candidate #<alt (λ (a) (/ (/ (/ 1 (- (acos a))) 1) (/ 1 a)))>
* [enter]simplify:  Simplifying (/ 1 a)
* * [misc]simplify:  iters left: 2 (3 enodes)
* * [misc]simplify:  iters left: 1 (5 enodes)
* [exit]simplify:  Simplified to (/ 1 a)
* [misc]simplify:  Simplified (2 2) to (λ (a) (/ (/ (/ 1 (- (acos a))) 1) (/ 1 a)))
* * * * [misc]progress:  [ 36 / 72 ] simplifiying candidate #<alt (λ (a) (/ (* (cbrt (/ 1 (- (acos a)))) (cbrt (/ 1 (- (acos a))))) (/ (/ 1 a) (cbrt (/ 1 (- (acos a)))))))>
* [enter]simplify:  Simplifying (* (cbrt (/ 1 (- (acos a)))) (cbrt (/ 1 (- (acos a)))))
* * [misc]simplify:  iters left: 6 (7 enodes)
* * [misc]simplify:  iters left: 5 (9 enodes)
* [exit]simplify:  Simplified to (* (cbrt (/ 1 (- (acos a)))) (cbrt (/ 1 (- (acos a)))))
* [misc]simplify:  Simplified (2 1) to (λ (a) (/ (* (cbrt (/ 1 (- (acos a)))) (cbrt (/ 1 (- (acos a))))) (/ (/ 1 a) (cbrt (/ 1 (- (acos a)))))))
* * * * [misc]progress:  [ 37 / 72 ] simplifiying candidate #<alt (λ (a) (/ (sqrt (/ 1 (- (acos a)))) (/ (/ 1 a) (sqrt (/ 1 (- (acos a)))))))>
* [enter]simplify:  Simplifying (sqrt (/ 1 (- (acos a))))
* * [misc]simplify:  iters left: 6 (6 enodes)
* * [misc]simplify:  iters left: 5 (8 enodes)
* [exit]simplify:  Simplified to (sqrt (/ 1 (- (acos a))))
* [misc]simplify:  Simplified (2 1) to (λ (a) (/ (sqrt (/ 1 (- (acos a)))) (/ (/ 1 a) (sqrt (/ 1 (- (acos a)))))))
* * * * [misc]progress:  [ 38 / 72 ] simplifiying candidate #<alt (λ (a) (/ 1 (/ (/ 1 a) (/ 1 (- (acos a))))))>
* * * * [misc]progress:  [ 39 / 72 ] simplifiying candidate #<alt (λ (a) (/ 1 (/ (/ 1 a) (/ 1 (- (acos a))))))>
* * * * [misc]progress:  [ 40 / 72 ] simplifiying candidate #<alt (λ (a) (* (/ (/ 1 (- (acos a))) 1) a))>
* * * * [misc]progress:  [ 41 / 72 ] simplifiying candidate #<alt (λ (a) (/ 1 (* (/ 1 a) (- (acos a)))))>
* * * * [misc]progress:  [ 42 / 72 ] simplifiying candidate #<alt (λ (a) (/ (log1p (expm1 (/ 1 (- (acos a))))) (/ 1 a)))>
* * * * [misc]progress:  [ 43 / 72 ] simplifiying candidate #<alt (λ (a) (/ (expm1 (log1p (/ 1 (- (acos a))))) (/ 1 a)))>
* * * * [misc]progress:  [ 44 / 72 ] simplifiying candidate #<alt (λ (a) (/ (pow (- (acos a)) -1) (/ 1 a)))>
* * * * [misc]progress:  [ 45 / 72 ] simplifiying candidate #<alt (λ (a) (/ (pow (- (acos a)) (- 1)) (/ 1 a)))>
* [enter]simplify:  Simplifying (- 1)
* * [misc]simplify:  iters left: 2 (2 enodes)
* * [misc]simplify:  iters left: 1 (4 enodes)
* [exit]simplify:  Simplified to (- 1)
* [misc]simplify:  Simplified (2 1 2) to (λ (a) (/ (pow (- (acos a)) (- 1)) (/ 1 a)))
* * * * [misc]progress:  [ 46 / 72 ] simplifiying candidate #<alt (λ (a) (/ (pow (/ 1 (- (acos a))) 1) (/ 1 a)))>
* * * * [misc]progress:  [ 47 / 72 ] simplifiying candidate #<alt (λ (a) (/ (exp (- (log (- (acos a))))) (/ 1 a)))>
* * * * [misc]progress:  [ 48 / 72 ] simplifiying candidate #<alt (λ (a) (/ (exp (log (/ 1 (- (acos a))))) (/ 1 a)))>
* * * * [misc]progress:  [ 49 / 72 ] simplifiying candidate #<alt (λ (a) (/ (log (exp (/ 1 (- (acos a))))) (/ 1 a)))>
* * * * [misc]progress:  [ 50 / 72 ] simplifiying candidate #<alt (λ (a) (/ (* (* (cbrt (/ 1 (- (acos a)))) (cbrt (/ 1 (- (acos a))))) (cbrt (/ 1 (- (acos a))))) (/ 1 a)))>
* * * * [misc]progress:  [ 51 / 72 ] simplifiying candidate #<alt (λ (a) (/ (cbrt (* (* (/ 1 (- (acos a))) (/ 1 (- (acos a)))) (/ 1 (- (acos a))))) (/ 1 a)))>
* * * * [misc]progress:  [ 52 / 72 ] simplifiying candidate #<alt (λ (a) (/ (* (sqrt (/ 1 (- (acos a)))) (sqrt (/ 1 (- (acos a))))) (/ 1 a)))>
* * * * [misc]progress:  [ 53 / 72 ] simplifiying candidate #<alt (λ (a) (/ (/ (- 1) (- (- (acos a)))) (/ 1 a)))>
* * * * [misc]progress:  [ 54 / 72 ] simplifiying candidate #<alt (λ (a) (/ (* 1 (/ 1 (- (acos a)))) (/ 1 a)))>
* * * * [misc]progress:  [ 55 / 72 ] simplifiying candidate #<alt (λ (a) (/ (* 1 (/ 1 (- (acos a)))) (/ 1 a)))>
* * * * [misc]progress:  [ 56 / 72 ] simplifiying candidate #<alt (λ (a) (/ (/ 1 (/ (- (acos a)) 1)) (/ 1 a)))>
* * * * [misc]progress:  [ 57 / 72 ] simplifiying candidate #<alt (λ (a) (/ (/ (/ 1 (* (cbrt (- (acos a))) (cbrt (- (acos a))))) (cbrt (- (acos a)))) (/ 1 a)))>
* [enter]simplify:  Simplifying (cbrt (- (acos a)))
* * [misc]simplify:  iters left: 4 (4 enodes)
* [exit]simplify:  Simplified to (cbrt (- (acos a)))
* [misc]simplify:  Simplified (2 1 2) to (λ (a) (/ (/ (/ 1 (* (cbrt (- (acos a))) (cbrt (- (acos a))))) (cbrt (- (acos a)))) (/ 1 a)))
* * * * [misc]progress:  [ 58 / 72 ] simplifiying candidate #<alt (λ (a) (/ (/ (/ 1 (sqrt (- (acos a)))) (sqrt (- (acos a)))) (/ 1 a)))>
* [enter]simplify:  Simplifying (sqrt (- (acos a)))
* * [misc]simplify:  iters left: 4 (4 enodes)
* [exit]simplify:  Simplified to (sqrt (- (acos a)))
* [misc]simplify:  Simplified (2 1 2) to (λ (a) (/ (/ (/ 1 (sqrt (- (acos a)))) (sqrt (- (acos a)))) (/ 1 a)))
* * * * [misc]progress:  [ 59 / 72 ] simplifiying candidate #<alt (λ (a) (/ (/ (/ 1 1) (- (acos a))) (/ 1 a)))>
* [enter]simplify:  Simplifying (- (acos a))
* * [misc]simplify:  iters left: 3 (3 enodes)
* [exit]simplify:  Simplified to (- (acos a))
* [misc]simplify:  Simplified (2 1 2) to (λ (a) (/ (/ (/ 1 1) (- (acos a))) (/ 1 a)))
* * * * [misc]progress:  [ 60 / 72 ] simplifiying candidate #<alt (λ (a) (/ (/ (/ 1 -1) (acos a)) (/ 1 a)))>
* [enter]simplify:  Simplifying (acos a)
* * [misc]simplify:  iters left: 1 (2 enodes)
* [exit]simplify:  Simplified to (acos a)
* [misc]simplify:  Simplified (2 1 2) to (λ (a) (/ (/ (/ 1 -1) (acos a)) (/ 1 a)))
* * * * [misc]progress:  [ 61 / 72 ] simplifiying candidate #<alt (λ (a) (/ (/ (/ 1 (- (* (cbrt (acos a)) (cbrt (acos a))))) (cbrt (acos a))) (/ 1 a)))>
* [enter]simplify:  Simplifying (cbrt (acos a))
* * [misc]simplify:  iters left: 2 (3 enodes)
* [exit]simplify:  Simplified to (cbrt (acos a))
* [misc]simplify:  Simplified (2 1 2) to (λ (a) (/ (/ (/ 1 (- (* (cbrt (acos a)) (cbrt (acos a))))) (cbrt (acos a))) (/ 1 a)))
* * * * [misc]progress:  [ 62 / 72 ] simplifiying candidate #<alt (λ (a) (/ (/ (/ 1 (- (sqrt (acos a)))) (sqrt (acos a))) (/ 1 a)))>
* [enter]simplify:  Simplifying (sqrt (acos a))
* * [misc]simplify:  iters left: 2 (3 enodes)
* [exit]simplify:  Simplified to (sqrt (acos a))
* [misc]simplify:  Simplified (2 1 2) to (λ (a) (/ (/ (/ 1 (- (sqrt (acos a)))) (sqrt (acos a))) (/ 1 a)))
* * * * [misc]progress:  [ 63 / 72 ] simplifiying candidate #<alt (λ (a) (/ (/ (/ 1 (- 1)) (acos a)) (/ 1 a)))>
* [enter]simplify:  Simplifying (acos a)
* * [misc]simplify:  iters left: 1 (2 enodes)
* [exit]simplify:  Simplified to (acos a)
* [misc]simplify:  Simplified (2 1 2) to (λ (a) (/ (/ (/ 1 (- 1)) (acos a)) (/ 1 a)))
* * * * [misc]progress:  [ 64 / 72 ] simplifiying candidate #<alt (λ (a) (/ (/ (/ 1 (* (cbrt (acos a)) (cbrt (acos a)))) (- (cbrt (acos a)))) (/ 1 a)))>
* [enter]simplify:  Simplifying (- (cbrt (acos a)))
* * [misc]simplify:  iters left: 4 (4 enodes)
* [exit]simplify:  Simplified to (- (cbrt (acos a)))
* [misc]simplify:  Simplified (2 1 2) to (λ (a) (/ (/ (/ 1 (* (cbrt (acos a)) (cbrt (acos a)))) (- (cbrt (acos a)))) (/ 1 a)))
* * * * [misc]progress:  [ 65 / 72 ] simplifiying candidate #<alt (λ (a) (/ (/ (/ 1 (sqrt (acos a))) (- (sqrt (acos a)))) (/ 1 a)))>
* [enter]simplify:  Simplifying (- (sqrt (acos a)))
* * [misc]simplify:  iters left: 4 (4 enodes)
* [exit]simplify:  Simplified to (- (sqrt (acos a)))
* [misc]simplify:  Simplified (2 1 2) to (λ (a) (/ (/ (/ 1 (sqrt (acos a))) (- (sqrt (acos a)))) (/ 1 a)))
* * * * [misc]progress:  [ 66 / 72 ] simplifiying candidate #<alt (λ (a) (/ (/ (/ 1 1) (- (acos a))) (/ 1 a)))>
* [enter]simplify:  Simplifying (- (acos a))
* * [misc]simplify:  iters left: 3 (3 enodes)
* [exit]simplify:  Simplified to (- (acos a))
* [misc]simplify:  Simplified (2 1 2) to (λ (a) (/ (/ (/ 1 1) (- (acos a))) (/ 1 a)))
* * * * [misc]progress:  [ 67 / 72 ] simplifiying candidate #<alt (λ (a) (* -1 (/ a (acos a))))>
* [enter]simplify:  Simplifying (* -1 (/ a (acos a)))
* * [misc]simplify:  iters left: 5 (5 enodes)
* * [misc]simplify:  iters left: 4 (9 enodes)
* * [misc]simplify:  iters left: 3 (14 enodes)
* * [misc]simplify:  iters left: 2 (16 enodes)
* * [misc]simplify:  iters left: 1 (18 enodes)
* [exit]simplify:  Simplified to (/ (- a) (acos a))
* [misc]simplify:  Simplified (2) to (λ (a) (/ (- a) (acos a)))
* * * * [misc]progress:  [ 68 / 72 ] simplifiying candidate #<alt (λ (a) (* -1 (/ a (acos a))))>
* [enter]simplify:  Simplifying (* -1 (/ a (acos a)))
* * [misc]simplify:  iters left: 5 (5 enodes)
* * [misc]simplify:  iters left: 4 (9 enodes)
* * [misc]simplify:  iters left: 3 (14 enodes)
* * [misc]simplify:  iters left: 2 (16 enodes)
* * [misc]simplify:  iters left: 1 (18 enodes)
* [exit]simplify:  Simplified to (/ (- a) (acos a))
* [misc]simplify:  Simplified (2) to (λ (a) (/ (- a) (acos a)))
* * * * [misc]progress:  [ 69 / 72 ] simplifiying candidate #<alt (λ (a) (* -1 (/ a (acos a))))>
* [enter]simplify:  Simplifying (* -1 (/ a (acos a)))
* * [misc]simplify:  iters left: 5 (5 enodes)
* * [misc]simplify:  iters left: 4 (9 enodes)
* * [misc]simplify:  iters left: 3 (14 enodes)
* * [misc]simplify:  iters left: 2 (16 enodes)
* * [misc]simplify:  iters left: 1 (18 enodes)
* [exit]simplify:  Simplified to (/ (- a) (acos a))
* [misc]simplify:  Simplified (2) to (λ (a) (/ (- a) (acos a)))
* * * * [misc]progress:  [ 70 / 72 ] simplifiying candidate #<alt (λ (a) (/ (/ -1 (acos a)) (/ 1 a)))>
* [enter]simplify:  Simplifying (/ -1 (acos a))
* * [misc]simplify:  iters left: 3 (4 enodes)
* [exit]simplify:  Simplified to (/ -1 (acos a))
* [misc]simplify:  Simplified (2 1) to (λ (a) (/ (/ -1 (acos a)) (/ 1 a)))
* * * * [misc]progress:  [ 71 / 72 ] simplifiying candidate #<alt (λ (a) (/ (/ -1 (acos a)) (/ 1 a)))>
* [enter]simplify:  Simplifying (/ -1 (acos a))
* * [misc]simplify:  iters left: 3 (4 enodes)
* [exit]simplify:  Simplified to (/ -1 (acos a))
* [misc]simplify:  Simplified (2 1) to (λ (a) (/ (/ -1 (acos a)) (/ 1 a)))
* * * * [misc]progress:  [ 72 / 72 ] simplifiying candidate #<alt (λ (a) (/ (/ -1 (acos a)) (/ 1 a)))>
* [enter]simplify:  Simplifying (/ -1 (acos a))
* * [misc]simplify:  iters left: 3 (4 enodes)
* [exit]simplify:  Simplified to (/ -1 (acos a))
* [misc]simplify:  Simplified (2 1) to (λ (a) (/ (/ -1 (acos a)) (/ 1 a)))
* * * [misc]progress:  adding candidates to table
* [misc]progress:  [Phase 3 of 3] Extracting.
* * [misc]regime:  Finding splitpoints for: (#<alt (λ (a) (/ (/ 1 (* (cbrt (/ (- (acos a)) a)) (cbrt (/ (- (acos a)) a)))) (cbrt (/ (- (acos a)) a))))> #<alt (λ (a) (* (* (cbrt (/ a (- (acos a)))) (cbrt (/ a (- (acos a))))) (cbrt (/ a (- (acos a))))))> #<alt (λ (a) (/ 1 (* (- (acos a)) (/ 1 a))))> #<alt (λ (a) (/ (cbrt (* (* (/ 1 (- (acos a))) (/ 1 (- (acos a)))) (/ 1 (- (acos a))))) (/ 1 a)))> #<alt (λ (a) (/ a (- (acos a))))> #<alt (λ (a) (/ 1 (cbrt (/ (/ (- (acos a)) a) (/ (* a a) (* (acos a) (acos a)))))))> #<alt (λ (a) (/ (/ 1 (- (acos a))) (/ 1 a)))>)
* * * [misc]regime-changes:  Trying 2 branch expressions: (a (/ a (- (acos a))))
* * * * [misc]regimes:  Trying to branch on a from (#<alt (λ (a) (/ (/ 1 (* (cbrt (/ (- (acos a)) a)) (cbrt (/ (- (acos a)) a)))) (cbrt (/ (- (acos a)) a))))> #<alt (λ (a) (* (* (cbrt (/ a (- (acos a)))) (cbrt (/ a (- (acos a))))) (cbrt (/ a (- (acos a))))))> #<alt (λ (a) (/ 1 (* (- (acos a)) (/ 1 a))))> #<alt (λ (a) (/ (cbrt (* (* (/ 1 (- (acos a))) (/ 1 (- (acos a)))) (/ 1 (- (acos a))))) (/ 1 a)))> #<alt (λ (a) (/ a (- (acos a))))> #<alt (λ (a) (/ 1 (cbrt (/ (/ (- (acos a)) a) (/ (* a a) (* (acos a) (acos a)))))))> #<alt (λ (a) (/ (/ 1 (- (acos a))) (/ 1 a)))>)
* * * * [misc]regimes:  Trying to branch on (/ a (- (acos a))) from (#<alt (λ (a) (/ (/ 1 (* (cbrt (/ (- (acos a)) a)) (cbrt (/ (- (acos a)) a)))) (cbrt (/ (- (acos a)) a))))> #<alt (λ (a) (* (* (cbrt (/ a (- (acos a)))) (cbrt (/ a (- (acos a))))) (cbrt (/ a (- (acos a))))))> #<alt (λ (a) (/ 1 (* (- (acos a)) (/ 1 a))))> #<alt (λ (a) (/ (cbrt (* (* (/ 1 (- (acos a))) (/ 1 (- (acos a)))) (/ 1 (- (acos a))))) (/ 1 a)))> #<alt (λ (a) (/ a (- (acos a))))> #<alt (λ (a) (/ 1 (cbrt (/ (/ (- (acos a)) a) (/ (* a a) (* (acos a) (acos a)))))))> #<alt (λ (a) (/ (/ 1 (- (acos a))) (/ 1 a)))>)
* * * [misc]regime:  Found split indices: #<option (#s(si 4 256))>
* [enter]simplify:  Simplifying (/ a (- (acos a)))
* * [misc]simplify:  iters left: 5 (4 enodes)
* [exit]simplify:  Simplified to (/ a (- (acos a)))
* * * * [misc]points:  Sampling 8000 additional inputs, on iter 0 have 0 / 8000
* * * * [misc]points:  Computing exacts on every 500 of 8000 points to ramp up precision
* * * * [misc]points:  Setting MPFR precision to 64
* * * * [misc]points:  Setting MPFR precision to 320
* * * * [misc]points:  Computing exacts on every 250 of 8000 points to ramp up precision
* * * * [misc]points:  Setting MPFR precision to 64
* * * * [misc]points:  Setting MPFR precision to 320
* * * * [misc]points:  Computing exacts on every 125 of 8000 points to ramp up precision
* * * * [misc]points:  Setting MPFR precision to 64
* * * * [misc]points:  Setting MPFR precision to 320
* * * * [misc]points:  Computing exacts on every 62 of 8000 points to ramp up precision
* * * * [misc]points:  Setting MPFR precision to 64
* * * * [misc]points:  Setting MPFR precision to 320
* * * * [misc]points:  Computing exacts on every 31 of 8000 points to ramp up precision
* * * * [misc]points:  Setting MPFR precision to 64
* * * * [misc]points:  Setting MPFR precision to 320
* * * * [misc]points:  Computing exacts on every 15 of 8000 points to ramp up precision
* * * * [misc]points:  Setting MPFR precision to 64
* * * * [misc]points:  Setting MPFR precision to 320
* * * * [misc]points:  Computing exacts on every 7 of 8000 points to ramp up precision
* * * * [misc]points:  Setting MPFR precision to 64
* * * * [misc]points:  Setting MPFR precision to 320
* * * * [misc]points:  Computing exacts on every 3 of 8000 points to ramp up precision
* * * * [misc]points:  Setting MPFR precision to 64
* * * * [misc]points:  Setting MPFR precision to 320
* * * * [misc]points:  Computing exacts for 8000 points
* * * * [misc]points:  Setting MPFR precision to 64
* * * * [misc]points:  Setting MPFR precision to 320
* * * * [misc]points:  Setting MPFR precision to 576
* * * * [misc]points:  Filtering points with unrepresentable outputs
* * * * [misc]points:  Sampling 3965 additional inputs, on iter 1 have 4035 / 8000
* * * * [misc]points:  Computing exacts on every 247 of 3965 points to ramp up precision
* * * * [misc]points:  Setting MPFR precision to 320
* * * * [misc]points:  Setting MPFR precision to 576
* * * * [misc]points:  Computing exacts on every 123 of 3965 points to ramp up precision
* * * * [misc]points:  Setting MPFR precision to 320
* * * * [misc]points:  Setting MPFR precision to 576
* * * * [misc]points:  Computing exacts on every 61 of 3965 points to ramp up precision
* * * * [misc]points:  Setting MPFR precision to 320
* * * * [misc]points:  Setting MPFR precision to 576
* * * * [misc]points:  Computing exacts on every 30 of 3965 points to ramp up precision
* * * * [misc]points:  Setting MPFR precision to 320
* * * * [misc]points:  Setting MPFR precision to 576
* * * * [misc]points:  Computing exacts on every 15 of 3965 points to ramp up precision
* * * * [misc]points:  Setting MPFR precision to 320
* * * * [misc]points:  Setting MPFR precision to 576
* * * * [misc]points:  Computing exacts on every 7 of 3965 points to ramp up precision
* * * * [misc]points:  Setting MPFR precision to 320
* * * * [misc]points:  Setting MPFR precision to 576
* * * * [misc]points:  Computing exacts on every 3 of 3965 points to ramp up precision
* * * * [misc]points:  Setting MPFR precision to 320
* * * * [misc]points:  Setting MPFR precision to 576
* * * * [misc]points:  Computing exacts for 3965 points
* * * * [misc]points:  Setting MPFR precision to 320
* * * * [misc]points:  Setting MPFR precision to 576
* * * * [misc]points:  Filtering points with unrepresentable outputs
* * * * [misc]points:  Sampling 1969 additional inputs, on iter 2 have 6031 / 8000
* * * * [misc]points:  Computing exacts on every 123 of 1969 points to ramp up precision
* * * * [misc]points:  Setting MPFR precision to 320
* * * * [misc]points:  Setting MPFR precision to 576
* * * * [misc]points:  Computing exacts on every 61 of 1969 points to ramp up precision
* * * * [misc]points:  Setting MPFR precision to 320
* * * * [misc]points:  Setting MPFR precision to 576
* * * * [misc]points:  Computing exacts on every 30 of 1969 points to ramp up precision
* * * * [misc]points:  Setting MPFR precision to 320
* * * * [misc]points:  Setting MPFR precision to 576
* * * * [misc]points:  Computing exacts on every 15 of 1969 points to ramp up precision
* * * * [misc]points:  Setting MPFR precision to 320
* * * * [misc]points:  Setting MPFR precision to 576
* * * * [misc]points:  Computing exacts on every 7 of 1969 points to ramp up precision
* * * * [misc]points:  Setting MPFR precision to 320
* * * * [misc]points:  Setting MPFR precision to 576
* * * * [misc]points:  Computing exacts on every 3 of 1969 points to ramp up precision
* * * * [misc]points:  Setting MPFR precision to 320
* * * * [misc]points:  Setting MPFR precision to 576
* * * * [misc]points:  Computing exacts for 1969 points
* * * * [misc]points:  Setting MPFR precision to 320
* * * * [misc]points:  Setting MPFR precision to 576
* * * * [misc]points:  Filtering points with unrepresentable outputs
* * * * [misc]points:  Sampling 1006 additional inputs, on iter 3 have 6994 / 8000
* * * * [misc]points:  Computing exacts on every 62 of 1006 points to ramp up precision
* * * * [misc]points:  Setting MPFR precision to 320
* * * * [misc]points:  Setting MPFR precision to 576
* * * * [misc]points:  Computing exacts on every 31 of 1006 points to ramp up precision
* * * * [misc]points:  Setting MPFR precision to 320
* * * * [misc]points:  Setting MPFR precision to 576
* * * * [misc]points:  Computing exacts on every 15 of 1006 points to ramp up precision
* * * * [misc]points:  Setting MPFR precision to 320
* * * * [misc]points:  Setting MPFR precision to 576
* * * * [misc]points:  Computing exacts on every 7 of 1006 points to ramp up precision
* * * * [misc]points:  Setting MPFR precision to 320
* * * * [misc]points:  Setting MPFR precision to 576
* * * * [misc]points:  Computing exacts on every 3 of 1006 points to ramp up precision
* * * * [misc]points:  Setting MPFR precision to 320
* * * * [misc]points:  Setting MPFR precision to 576
* * * * [misc]points:  Computing exacts for 1006 points
* * * * [misc]points:  Setting MPFR precision to 320
* * * * [misc]points:  Setting MPFR precision to 576
* * * * [misc]points:  Filtering points with unrepresentable outputs
* * * * [misc]points:  Sampling 510 additional inputs, on iter 4 have 7490 / 8000
* * * * [misc]points:  Computing exacts on every 31 of 510 points to ramp up precision
* * * * [misc]points:  Setting MPFR precision to 320
* * * * [misc]points:  Setting MPFR precision to 576
* * * * [misc]points:  Computing exacts on every 15 of 510 points to ramp up precision
* * * * [misc]points:  Setting MPFR precision to 320
* * * * [misc]points:  Setting MPFR precision to 576
* * * * [misc]points:  Computing exacts on every 7 of 510 points to ramp up precision
* * * * [misc]points:  Setting MPFR precision to 320
* * * * [misc]points:  Setting MPFR precision to 576
* * * * [misc]points:  Computing exacts on every 3 of 510 points to ramp up precision
* * * * [misc]points:  Setting MPFR precision to 320
* * * * [misc]points:  Setting MPFR precision to 576
* * * * [misc]points:  Computing exacts for 510 points
* * * * [misc]points:  Setting MPFR precision to 320
* * * * [misc]points:  Setting MPFR precision to 576
* * * * [misc]points:  Filtering points with unrepresentable outputs
* * * * [misc]points:  Sampling 267 additional inputs, on iter 5 have 7733 / 8000
* * * * [misc]points:  Computing exacts on every 16 of 267 points to ramp up precision
* * * * [misc]points:  Setting MPFR precision to 320
* * * * [misc]points:  Setting MPFR precision to 576
* * * * [misc]points:  Computing exacts on every 8 of 267 points to ramp up precision
* * * * [misc]points:  Setting MPFR precision to 320
* * * * [misc]points:  Setting MPFR precision to 576
* * * * [misc]points:  Computing exacts on every 4 of 267 points to ramp up precision
* * * * [misc]points:  Setting MPFR precision to 320
* * * * [misc]points:  Setting MPFR precision to 576
* * * * [misc]points:  Computing exacts on every 2 of 267 points to ramp up precision
* * * * [misc]points:  Setting MPFR precision to 320
* * * * [misc]points:  Setting MPFR precision to 576
* * * * [misc]points:  Computing exacts for 267 points
* * * * [misc]points:  Setting MPFR precision to 320
* * * * [misc]points:  Setting MPFR precision to 576
* * * * [misc]points:  Filtering points with unrepresentable outputs
* * * * [misc]points:  Sampling 127 additional inputs, on iter 6 have 7873 / 8000
* * * * [misc]points:  Computing exacts on every 7 of 127 points to ramp up precision
* * * * [misc]points:  Setting MPFR precision to 320
* * * * [misc]points:  Setting MPFR precision to 576
* * * * [misc]points:  Computing exacts on every 3 of 127 points to ramp up precision
* * * * [misc]points:  Setting MPFR precision to 320
* * * * [misc]points:  Setting MPFR precision to 576
* * * * [misc]points:  Computing exacts for 127 points
* * * * [misc]points:  Setting MPFR precision to 320
* * * * [misc]points:  Setting MPFR precision to 576
* * * * [misc]points:  Filtering points with unrepresentable outputs
* * * * [misc]points:  Sampling 65 additional inputs, on iter 7 have 7935 / 8000
* * * * [misc]points:  Computing exacts on every 4 of 65 points to ramp up precision
* * * * [misc]points:  Setting MPFR precision to 320
* * * * [misc]points:  Setting MPFR precision to 576
* * * * [misc]points:  Computing exacts on every 2 of 65 points to ramp up precision
* * * * [misc]points:  Setting MPFR precision to 320
* * * * [misc]points:  Setting MPFR precision to 576
* * * * [misc]points:  Computing exacts for 65 points
* * * * [misc]points:  Setting MPFR precision to 320
* * * * [misc]points:  Setting MPFR precision to 576
* * * * [misc]points:  Filtering points with unrepresentable outputs
* * * * [misc]points:  Sampling 34 additional inputs, on iter 8 have 7966 / 8000
* * * * [misc]points:  Computing exacts on every 2 of 34 points to ramp up precision
* * * * [misc]points:  Setting MPFR precision to 320
* * * * [misc]points:  Setting MPFR precision to 576
* * * * [misc]points:  Computing exacts for 34 points
* * * * [misc]points:  Setting MPFR precision to 320
* * * * [misc]points:  Setting MPFR precision to 576
* * * * [misc]points:  Filtering points with unrepresentable outputs
* * * * [misc]points:  Sampling 13 additional inputs, on iter 9 have 7987 / 8000
* * * * [misc]points:  Computing exacts for 13 points
* * * * [misc]points:  Setting MPFR precision to 320
* * * * [misc]points:  Setting MPFR precision to 576
* * * * [misc]points:  Filtering points with unrepresentable outputs
* * * * [misc]points:  Sampling 7 additional inputs, on iter 10 have 7993 / 8000
* * * * [misc]points:  Computing exacts for 7 points
* * * * [misc]points:  Setting MPFR precision to 320
* * * * [misc]points:  Setting MPFR precision to 576
* * * * [misc]points:  Filtering points with unrepresentable outputs
* * * * [misc]points:  Sampling 4 additional inputs, on iter 11 have 7996 / 8000
* * * * [misc]points:  Computing exacts for 4 points
* * * * [misc]points:  Setting MPFR precision to 320
* * * * [misc]points:  Setting MPFR precision to 576
* * * * [misc]points:  Filtering points with unrepresentable outputs
* * * * [misc]points:  Sampling 4 additional inputs, on iter 12 have 7998 / 8000
* * * * [misc]points:  Computing exacts for 4 points
* * * * [misc]points:  Setting MPFR precision to 320
* * * * [misc]points:  Setting MPFR precision to 576
* * * * [misc]points:  Filtering points with unrepresentable outputs
* * * * [exit]points:  Sampled 8001 points with exact outputs