* [misc]progress:  [Phase 1 of 3] Setting up.
* * * [misc]progress:  [1/2] Preparing points
* * * [misc]progress:  [2/2] Setting up program.
* [enter]simplify:  Simplifying (- (* x x) (* y y))
* * [misc]simplify:  iters left: 4 (5 enodes)
* * [misc]simplify:  iters left: 3 (7 enodes)
* * [misc]simplify:  iters left: 2 (10 enodes)
* * [misc]simplify:  iters left: 1 (12 enodes)
* [exit]simplify:  Simplified to (- (sqr x) (sqr y))
* [misc]progress:  [Phase 2 of 3] Improving.
* * [misc]progress:  iteration 1 / 3
* * * [misc]progress:  picking best candidate
* * * * [misc]pick:  Picked  #<alt-delta (λ (x y) (- (sqr x) (sqr y)))>
* * * [misc]progress:  localizing error
* * * [misc]progress:  generating series expansions
* * * * [misc]progress:  [ 1 / 1 ] generating series at (2)
* [misc]approximate:  Taking taylor expansion of (- (sqr x) (sqr y)) in (x y) around 0
* [misc]taylor:  Taking taylor expansion of (- (sqr x) (sqr y)) in y
* [misc]taylor:  Taking taylor expansion of (sqr x) in y
* [misc]taylor:  Taking taylor expansion of x in y
* [misc]backup-simplify:  Simplify x into x
* [misc]taylor:  Taking taylor expansion of (sqr y) in y
* [misc]taylor:  Taking taylor expansion of y in y
* [misc]backup-simplify:  Simplify 0 into 0
* [misc]backup-simplify:  Simplify 1 into 1
* [misc]taylor:  Taking taylor expansion of (- (sqr x) (sqr y)) in x
* [misc]taylor:  Taking taylor expansion of (sqr x) in x
* [misc]taylor:  Taking taylor expansion of x in x
* [misc]backup-simplify:  Simplify 0 into 0
* [misc]backup-simplify:  Simplify 1 into 1
* [misc]taylor:  Taking taylor expansion of (sqr y) in x
* [misc]taylor:  Taking taylor expansion of y in x
* [misc]backup-simplify:  Simplify y into y
* [misc]taylor:  Taking taylor expansion of (- (sqr x) (sqr y)) in x
* [misc]taylor:  Taking taylor expansion of (sqr x) in x
* [misc]taylor:  Taking taylor expansion of x in x
* [misc]backup-simplify:  Simplify 0 into 0
* [misc]backup-simplify:  Simplify 1 into 1
* [misc]taylor:  Taking taylor expansion of (sqr y) in x
* [misc]taylor:  Taking taylor expansion of y in x
* [misc]backup-simplify:  Simplify y into y
* [misc]backup-simplify:  Simplify (* 0 0) into 0
* [misc]backup-simplify:  Simplify (* y y) into (sqr y)
* [misc]backup-simplify:  Simplify (- (sqr y)) into (- (sqr y))
* [misc]backup-simplify:  Simplify (+ 0 (- (sqr y))) into (- (sqr y))
* [misc]taylor:  Taking taylor expansion of (- (sqr y)) in y
* [misc]taylor:  Taking taylor expansion of (sqr y) in y
* [misc]taylor:  Taking taylor expansion of y in y
* [misc]backup-simplify:  Simplify 0 into 0
* [misc]backup-simplify:  Simplify 1 into 1
* [misc]backup-simplify:  Simplify (* 0 0) into 0
* [misc]backup-simplify:  Simplify (- 0) into 0
* [misc]backup-simplify:  Simplify 0 into 0
* [misc]backup-simplify:  Simplify (+ (* 0 1) (* 1 0)) into 0
* [misc]backup-simplify:  Simplify (+ (* y 0) (* 0 y)) into 0
* [misc]backup-simplify:  Simplify (- 0) into 0
* [misc]backup-simplify:  Simplify (+ 0 0) into 0
* [misc]taylor:  Taking taylor expansion of 0 in y
* [misc]backup-simplify:  Simplify 0 into 0
* [misc]backup-simplify:  Simplify 0 into 0
* [misc]backup-simplify:  Simplify (+ (* 0 1) (* 1 0)) into 0
* [misc]backup-simplify:  Simplify (- 0) into 0
* [misc]backup-simplify:  Simplify 0 into 0
* [misc]backup-simplify:  Simplify (+ (* 0 0) (+ (* 1 1) (* 0 0))) into 1
* [misc]backup-simplify:  Simplify (+ (* y 0) (+ (* 0 0) (* 0 y))) into 0
* [misc]backup-simplify:  Simplify (- 0) into 0
* [misc]backup-simplify:  Simplify (+ 1 0) into 1
* [misc]taylor:  Taking taylor expansion of 1 in y
* [misc]backup-simplify:  Simplify 1 into 1
* [misc]backup-simplify:  Simplify 1 into 1
* [misc]backup-simplify:  Simplify 0 into 0
* [misc]backup-simplify:  Simplify (+ (* 0 0) (+ (* 1 1) (* 0 0))) into 1
* [misc]backup-simplify:  Simplify (- 1) into -1
* [misc]backup-simplify:  Simplify -1 into -1
* [misc]backup-simplify:  Simplify (+ (* 0 0) (+ (* 1 0) (+ (* 0 1) (* 0 0)))) into 0
* [misc]backup-simplify:  Simplify (+ (* y 0) (+ (* 0 0) (+ (* 0 0) (* 0 y)))) into 0
* [misc]backup-simplify:  Simplify (- 0) into 0
* [misc]backup-simplify:  Simplify (+ 0 0) into 0
* [misc]taylor:  Taking taylor expansion of 0 in y
* [misc]backup-simplify:  Simplify 0 into 0
* [misc]backup-simplify:  Simplify 0 into 0
* [misc]backup-simplify:  Simplify 0 into 0
* [misc]backup-simplify:  Simplify 0 into 0
* [misc]backup-simplify:  Simplify (+ (* 0 0) (+ (* 1 0) (+ (* 0 1) (* 0 0)))) into 0
* [misc]backup-simplify:  Simplify (- 0) into 0
* [misc]backup-simplify:  Simplify 0 into 0
* [misc]backup-simplify:  Simplify (+ (* 0 0) (+ (* 1 0) (+ (* 0 0) (+ (* 0 1) (* 0 0))))) into 0
* [misc]backup-simplify:  Simplify (+ (* y 0) (+ (* 0 0) (+ (* 0 0) (+ (* 0 0) (* 0 y))))) into 0
* [misc]backup-simplify:  Simplify (- 0) into 0
* [misc]backup-simplify:  Simplify (+ 0 0) into 0
* [misc]taylor:  Taking taylor expansion of 0 in y
* [misc]backup-simplify:  Simplify 0 into 0
* [misc]backup-simplify:  Simplify 0 into 0
* [misc]backup-simplify:  Simplify 0 into 0
* [misc]backup-simplify:  Simplify (+ (* -1 (sqr (* y 1))) (* 1 (sqr (* 1 x)))) into (- (sqr x) (sqr y))
* [misc]approximate:  Taking taylor expansion of (- (sqr (/ 1 x)) (sqr (/ 1 y))) in (x y) around 0
* [misc]taylor:  Taking taylor expansion of (- (sqr (/ 1 x)) (sqr (/ 1 y))) in y
* [misc]taylor:  Taking taylor expansion of (sqr (/ 1 x)) in y
* [misc]taylor:  Taking taylor expansion of (/ 1 x) in y
* [misc]taylor:  Taking taylor expansion of x in y
* [misc]backup-simplify:  Simplify x into x
* [misc]backup-simplify:  Simplify (/ 1 x) into (/ 1 x)
* [misc]taylor:  Taking taylor expansion of (sqr (/ 1 y)) in y
* [misc]taylor:  Taking taylor expansion of (/ 1 y) in y
* [misc]taylor:  Taking taylor expansion of y in y
* [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 (- (sqr (/ 1 x)) (sqr (/ 1 y))) in x
* [misc]taylor:  Taking taylor expansion of (sqr (/ 1 x)) in x
* [misc]taylor:  Taking taylor expansion of (/ 1 x) in x
* [misc]taylor:  Taking taylor expansion of x in x
* [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 (sqr (/ 1 y)) in x
* [misc]taylor:  Taking taylor expansion of (/ 1 y) in x
* [misc]taylor:  Taking taylor expansion of y in x
* [misc]backup-simplify:  Simplify y into y
* [misc]backup-simplify:  Simplify (/ 1 y) into (/ 1 y)
* [misc]taylor:  Taking taylor expansion of (- (sqr (/ 1 x)) (sqr (/ 1 y))) in x
* [misc]taylor:  Taking taylor expansion of (sqr (/ 1 x)) in x
* [misc]taylor:  Taking taylor expansion of (/ 1 x) in x
* [misc]taylor:  Taking taylor expansion of x in x
* [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 (sqr (/ 1 y)) in x
* [misc]taylor:  Taking taylor expansion of (/ 1 y) in x
* [misc]taylor:  Taking taylor expansion of y in x
* [misc]backup-simplify:  Simplify y into y
* [misc]backup-simplify:  Simplify (/ 1 y) into (/ 1 y)
* [misc]backup-simplify:  Simplify (* 1 1) into 1
* [misc]backup-simplify:  Simplify (+ 1 0) into 1
* [misc]taylor:  Taking taylor expansion of 1 in y
* [misc]backup-simplify:  Simplify 1 into 1
* [misc]backup-simplify:  Simplify (- (+ (* 1 (/ 0 1)))) into 0
* [misc]backup-simplify:  Simplify (+ (* 1 0) (* 0 1)) into 0
* [misc]backup-simplify:  Simplify (+ 0 0) into 0
* [misc]taylor:  Taking taylor expansion of 0 in y
* [misc]backup-simplify:  Simplify 0 into 0
* [misc]backup-simplify:  Simplify (- (+ (* 1 (/ 0 1)) (* 0 (/ 0 1)))) into 0
* [misc]backup-simplify:  Simplify (+ (* 1 0) (+ (* 0 0) (* 0 1))) into 0
* [misc]backup-simplify:  Simplify (* (/ 1 y) (/ 1 y)) into (/ 1 (sqr y))
* [misc]backup-simplify:  Simplify (- (/ 1 (sqr y))) into (- (/ 1 (sqr y)))
* [misc]backup-simplify:  Simplify (+ 0 (- (/ 1 (sqr y)))) into (- (/ 1 (sqr y)))
* [misc]taylor:  Taking taylor expansion of (- (/ 1 (sqr y))) in y
* [misc]taylor:  Taking taylor expansion of (/ 1 (sqr y)) in y
* [misc]taylor:  Taking taylor expansion of (sqr y) in y
* [misc]taylor:  Taking taylor expansion of y in y
* [misc]backup-simplify:  Simplify 0 into 0
* [misc]backup-simplify:  Simplify 1 into 1
* [misc]backup-simplify:  Simplify (* 0 0) into 0
* [misc]backup-simplify:  Simplify (+ (* 0 1) (* 1 0)) into 0
* [misc]backup-simplify:  Simplify (+ (* 0 0) (+ (* 1 1) (* 0 0))) into 1
* [misc]backup-simplify:  Simplify (/ 1 1) into 1
* [misc]backup-simplify:  Simplify (- 1) into -1
* [misc]backup-simplify:  Simplify -1 into -1
* [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) (+ (* 0 0) (+ (* 0 0) (* 0 1)))) into 0
* [misc]backup-simplify:  Simplify (- (+ (* (/ 1 y) (/ 0 y)))) into 0
* [misc]backup-simplify:  Simplify (+ (* (/ 1 y) 0) (* 0 (/ 1 y))) into 0
* [misc]backup-simplify:  Simplify (- 0) into 0
* [misc]backup-simplify:  Simplify (+ 0 0) into 0
* [misc]taylor:  Taking taylor expansion of 0 in y
* [misc]backup-simplify:  Simplify 0 into 0
* [misc]backup-simplify:  Simplify (+ (* 0 0) (+ (* 1 0) (+ (* 0 1) (* 0 0)))) into 0
* [misc]backup-simplify:  Simplify (- (+ (* 1 (/ 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 (- (+ (* 1 (/ 0 1)) (* 0 (/ 0 1)) (* 0 (/ 0 1)) (* 0 (/ 0 1)))) into 0
* [misc]backup-simplify:  Simplify (+ (* 1 0) (+ (* 0 0) (+ (* 0 0) (+ (* 0 0) (* 0 1))))) into 0
* [misc]backup-simplify:  Simplify (- (+ (* (/ 1 y) (/ 0 y)) (* 0 (/ 0 y)))) into 0
* [misc]backup-simplify:  Simplify (+ (* (/ 1 y) 0) (+ (* 0 0) (* 0 (/ 1 y)))) into 0
* [misc]backup-simplify:  Simplify (- 0) into 0
* [misc]backup-simplify:  Simplify (+ 0 0) into 0
* [misc]taylor:  Taking taylor expansion of 0 in y
* [misc]backup-simplify:  Simplify 0 into 0
* [misc]backup-simplify:  Simplify (+ (* 0 0) (+ (* 1 0) (+ (* 0 0) (+ (* 0 1) (* 0 0))))) 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 0 into 0
* [misc]backup-simplify:  Simplify 0 into 0
* [misc]backup-simplify:  Simplify (+ (* 1 (sqr (* 1 (/ 1 (/ 1 x))))) (* -1 (sqr (* (/ 1 (/ 1 y)) 1)))) into (- (sqr x) (sqr y))
* [misc]approximate:  Taking taylor expansion of (- (sqr (/ 1 (- x))) (sqr (/ 1 (- y)))) in (x y) around 0
* [misc]taylor:  Taking taylor expansion of (- (sqr (/ 1 (- x))) (sqr (/ 1 (- y)))) in y
* [misc]taylor:  Taking taylor expansion of (sqr (/ 1 (- x))) in y
* [misc]taylor:  Taking taylor expansion of (/ 1 (- x)) in y
* [misc]taylor:  Taking taylor expansion of (- x) in y
* [misc]taylor:  Taking taylor expansion of x in y
* [misc]backup-simplify:  Simplify x into x
* [misc]backup-simplify:  Simplify (- x) into (- x)
* [misc]backup-simplify:  Simplify (- x) into (- x)
* [misc]backup-simplify:  Simplify (/ 1 (- x)) into (/ -1 x)
* [misc]taylor:  Taking taylor expansion of (sqr (/ 1 (- y))) in y
* [misc]taylor:  Taking taylor expansion of (/ 1 (- y)) in y
* [misc]taylor:  Taking taylor expansion of (- y) in y
* [misc]taylor:  Taking taylor expansion of y in y
* [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 (- (sqr (/ 1 (- x))) (sqr (/ 1 (- y)))) in x
* [misc]taylor:  Taking taylor expansion of (sqr (/ 1 (- x))) in x
* [misc]taylor:  Taking taylor expansion of (/ 1 (- x)) in x
* [misc]taylor:  Taking taylor expansion of (- x) in x
* [misc]taylor:  Taking taylor expansion of x in x
* [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 (sqr (/ 1 (- y))) in x
* [misc]taylor:  Taking taylor expansion of (/ 1 (- y)) in x
* [misc]taylor:  Taking taylor expansion of (- y) in x
* [misc]taylor:  Taking taylor expansion of y in x
* [misc]backup-simplify:  Simplify y into y
* [misc]backup-simplify:  Simplify (- y) into (- y)
* [misc]backup-simplify:  Simplify (- y) into (- y)
* [misc]backup-simplify:  Simplify (/ 1 (- y)) into (/ -1 y)
* [misc]taylor:  Taking taylor expansion of (- (sqr (/ 1 (- x))) (sqr (/ 1 (- y)))) in x
* [misc]taylor:  Taking taylor expansion of (sqr (/ 1 (- x))) in x
* [misc]taylor:  Taking taylor expansion of (/ 1 (- x)) in x
* [misc]taylor:  Taking taylor expansion of (- x) in x
* [misc]taylor:  Taking taylor expansion of x in x
* [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 (sqr (/ 1 (- y))) in x
* [misc]taylor:  Taking taylor expansion of (/ 1 (- y)) in x
* [misc]taylor:  Taking taylor expansion of (- y) in x
* [misc]taylor:  Taking taylor expansion of y in x
* [misc]backup-simplify:  Simplify y into y
* [misc]backup-simplify:  Simplify (- y) into (- y)
* [misc]backup-simplify:  Simplify (- y) into (- y)
* [misc]backup-simplify:  Simplify (/ 1 (- y)) into (/ -1 y)
* [misc]backup-simplify:  Simplify (* -1 -1) into 1
* [misc]backup-simplify:  Simplify (+ 1 0) into 1
* [misc]taylor:  Taking taylor expansion of 1 in y
* [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)))) into 0
* [misc]backup-simplify:  Simplify (+ (* -1 0) (* 0 -1)) into 0
* [misc]backup-simplify:  Simplify (+ 0 0) into 0
* [misc]taylor:  Taking taylor expansion of 0 in y
* [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 (+ (* -1 0) (+ (* 0 0) (* 0 -1))) into 0
* [misc]backup-simplify:  Simplify (* (/ -1 y) (/ -1 y)) into (/ 1 (sqr y))
* [misc]backup-simplify:  Simplify (- (/ 1 (sqr y))) into (- (/ 1 (sqr y)))
* [misc]backup-simplify:  Simplify (+ 0 (- (/ 1 (sqr y)))) into (- (/ 1 (sqr y)))
* [misc]taylor:  Taking taylor expansion of (- (/ 1 (sqr y))) in y
* [misc]taylor:  Taking taylor expansion of (/ 1 (sqr y)) in y
* [misc]taylor:  Taking taylor expansion of (sqr y) in y
* [misc]taylor:  Taking taylor expansion of y in y
* [misc]backup-simplify:  Simplify 0 into 0
* [misc]backup-simplify:  Simplify 1 into 1
* [misc]backup-simplify:  Simplify (* 0 0) into 0
* [misc]backup-simplify:  Simplify (+ (* 0 1) (* 1 0)) into 0
* [misc]backup-simplify:  Simplify (+ (* 0 0) (+ (* 1 1) (* 0 0))) into 1
* [misc]backup-simplify:  Simplify (/ 1 1) into 1
* [misc]backup-simplify:  Simplify (- 1) into -1
* [misc]backup-simplify:  Simplify -1 into -1
* [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)))) into 0
* [misc]backup-simplify:  Simplify (+ (* -1 0) (+ (* 0 0) (+ (* 0 0) (* 0 -1)))) into 0
* [misc]backup-simplify:  Simplify (- 0) into 0
* [misc]backup-simplify:  Simplify (- y) into (- y)
* [misc]backup-simplify:  Simplify (- (+ (* (/ -1 y) (/ 0 (- y))))) into 0
* [misc]backup-simplify:  Simplify (+ (* (/ -1 y) 0) (* 0 (/ -1 y))) into 0
* [misc]backup-simplify:  Simplify (- 0) into 0
* [misc]backup-simplify:  Simplify (+ 0 0) into 0
* [misc]taylor:  Taking taylor expansion of 0 in y
* [misc]backup-simplify:  Simplify 0 into 0
* [misc]backup-simplify:  Simplify (+ (* 0 0) (+ (* 1 0) (+ (* 0 1) (* 0 0)))) into 0
* [misc]backup-simplify:  Simplify (- (+ (* 1 (/ 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 (- 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) (+ (* 0 0) (+ (* 0 0) (+ (* 0 0) (* 0 -1))))) into 0
* [misc]backup-simplify:  Simplify (- 0) into 0
* [misc]backup-simplify:  Simplify (- y) into (- y)
* [misc]backup-simplify:  Simplify (- 0) into 0
* [misc]backup-simplify:  Simplify (- y) into (- y)
* [misc]backup-simplify:  Simplify (- (+ (* (/ -1 y) (/ 0 (- y))) (* 0 (/ 0 (- y))))) into 0
* [misc]backup-simplify:  Simplify (+ (* (/ -1 y) 0) (+ (* 0 0) (* 0 (/ -1 y)))) into 0
* [misc]backup-simplify:  Simplify (- 0) into 0
* [misc]backup-simplify:  Simplify (+ 0 0) into 0
* [misc]taylor:  Taking taylor expansion of 0 in y
* [misc]backup-simplify:  Simplify 0 into 0
* [misc]backup-simplify:  Simplify (+ (* 0 0) (+ (* 1 0) (+ (* 0 0) (+ (* 0 1) (* 0 0))))) 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 0 into 0
* [misc]backup-simplify:  Simplify 0 into 0
* [misc]backup-simplify:  Simplify (+ (* 1 (sqr (* 1 (/ 1 (/ 1 (- x)))))) (* -1 (sqr (* (/ 1 (/ 1 (- y))) 1)))) into (- (sqr x) (sqr y))
* * * [misc]progress:  generating rewritten candidates
* * * * [misc]progress:  [ 1 / 1 ] rewriting at (2)
* * * [misc]progress:  simplifying candidates
* * * * [misc]progress:  [ 1 / 16 ] simplifiying candidate #<alt-event (λ (x y) (- (sqr x) (sqr y)))>
* [enter]simplify:  Simplifying (- (sqr x) (sqr y))
* * [misc]simplify:  iters left: 3 (5 enodes)
* * [misc]simplify:  iters left: 2 (10 enodes)
* * [misc]simplify:  iters left: 1 (12 enodes)
* [exit]simplify:  Simplified to (- (sqr x) (sqr y))
* * * * [misc]progress:  [ 2 / 16 ] simplifiying candidate #<alt-event (λ (x y) (- (sqr x) (sqr y)))>
* [enter]simplify:  Simplifying (- (sqr x) (sqr y))
* * [misc]simplify:  iters left: 3 (5 enodes)
* * [misc]simplify:  iters left: 2 (10 enodes)
* * [misc]simplify:  iters left: 1 (12 enodes)
* [exit]simplify:  Simplified to (- (sqr x) (sqr y))
* * * * [misc]progress:  [ 3 / 16 ] simplifiying candidate #<alt-event (λ (x y) (- (sqr x) (sqr y)))>
* [enter]simplify:  Simplifying (- (sqr x) (sqr y))
* * [misc]simplify:  iters left: 3 (5 enodes)
* * [misc]simplify:  iters left: 2 (10 enodes)
* * [misc]simplify:  iters left: 1 (12 enodes)
* [exit]simplify:  Simplified to (- (sqr x) (sqr y))
* * * * [misc]progress:  [ 4 / 16 ] simplifiying candidate #<alt-delta (λ (x y) (log (/ (exp (sqr x)) (exp (sqr y)))))>
* [enter]simplify:  Simplifying (/ (exp (sqr x)) (exp (sqr y)))
* * [misc]simplify:  iters left: 4 (7 enodes)
* * [misc]simplify:  iters left: 3 (11 enodes)
* * [misc]simplify:  iters left: 2 (18 enodes)
* * [misc]simplify:  iters left: 1 (22 enodes)
* [exit]simplify:  Simplified to (exp (- (sqr x) (* y y)))
* [exit]simplify:  Simplified to (exp (- (sqr x) (* y y)))
* * * * [misc]progress:  [ 5 / 16 ] simplifiying candidate #<alt-delta (λ (x y) (pow (- (sqr x) (sqr y)) 1))>
* * * * [misc]progress:  [ 6 / 16 ] simplifiying candidate #<alt-delta (λ (x y) (exp (log (- (sqr x) (sqr y)))))>
* [enter]simplify:  Simplifying (log (- (sqr x) (sqr y)))
* * [misc]simplify:  iters left: 4 (6 enodes)
* * [misc]simplify:  iters left: 3 (11 enodes)
* * [misc]simplify:  iters left: 2 (16 enodes)
* * [misc]simplify:  iters left: 1 (25 enodes)
* [exit]simplify:  Simplified to (log (- (sqr x) (sqr y)))
* [exit]simplify:  Simplified to (log (- (sqr x) (sqr y)))
* * * * [misc]progress:  [ 7 / 16 ] simplifiying candidate #<alt-delta (λ (x y) (log (exp (- (sqr x) (sqr y)))))>
* [enter]simplify:  Simplifying (exp (- (sqr x) (sqr y)))
* * [misc]simplify:  iters left: 4 (6 enodes)
* * [misc]simplify:  iters left: 3 (14 enodes)
* * [misc]simplify:  iters left: 2 (22 enodes)
* * [misc]simplify:  iters left: 1 (32 enodes)
* [exit]simplify:  Simplified to (exp (* (+ y x) (- x y)))
* [exit]simplify:  Simplified to (exp (* (+ y x) (- x y)))
* * * * [misc]progress:  [ 8 / 16 ] simplifiying candidate #<alt-delta (λ (x y) (cube (cbrt (- (sqr x) (sqr y)))))>
* [enter]simplify:  Simplifying (cbrt (- (sqr x) (sqr y)))
* * [misc]simplify:  iters left: 4 (6 enodes)
* * [misc]simplify:  iters left: 3 (11 enodes)
* * [misc]simplify:  iters left: 2 (13 enodes)
* * [misc]simplify:  iters left: 1 (21 enodes)
* [exit]simplify:  Simplified to (cbrt (- (sqr x) (sqr y)))
* [exit]simplify:  Simplified to (cbrt (- (sqr x) (sqr y)))
* * * * [misc]progress:  [ 9 / 16 ] simplifiying candidate #<alt-delta (λ (x y) (cbrt (cube (- (sqr x) (sqr y)))))>
* [enter]simplify:  Simplifying (cube (- (sqr x) (sqr y)))
* * [misc]simplify:  iters left: 4 (6 enodes)
* * [misc]simplify:  iters left: 3 (13 enodes)
* * [misc]simplify:  iters left: 2 (22 enodes)
* * [misc]simplify:  iters left: 1 (49 enodes)
* [exit]simplify:  Simplified to (cube (* (+ y x) (- x y)))
* [exit]simplify:  Simplified to (cube (* (+ y x) (- x y)))
* * * * [misc]progress:  [ 10 / 16 ] simplifiying candidate #<alt-delta (λ (x y) (sqr (sqrt (- (sqr x) (sqr y)))))>
* [enter]simplify:  Simplifying (sqrt (- (sqr x) (sqr y)))
* * [misc]simplify:  iters left: 4 (6 enodes)
* * [misc]simplify:  iters left: 3 (11 enodes)
* * [misc]simplify:  iters left: 2 (13 enodes)
* * [misc]simplify:  iters left: 1 (21 enodes)
* [exit]simplify:  Simplified to (sqrt (- (sqr x) (sqr y)))
* [exit]simplify:  Simplified to (sqrt (- (sqr x) (sqr y)))
* * * * [misc]progress:  [ 11 / 16 ] simplifiying candidate #<alt-delta (λ (x y) (/ (- (pow (sqr x) 3) (pow (sqr y) 3)) (+ (sqr (sqr x)) (+ (sqr (sqr y)) (* (sqr x) (sqr y))))))>
* [enter]simplify:  Simplifying (- (pow (sqr x) 3) (pow (sqr y) 3))
* * [misc]simplify:  iters left: 4 (8 enodes)
* * [misc]simplify:  iters left: 3 (12 enodes)
* * [misc]simplify:  iters left: 2 (20 enodes)
* * [misc]simplify:  iters left: 1 (32 enodes)
* [exit]simplify:  Simplified to (* (+ (cube x) (cube y)) (- (cube x) (cube y)))
* [exit]simplify:  Simplified to (* (+ (cube x) (cube y)) (- (cube x) (cube y)))
* [enter]simplify:  Simplifying (+ (sqr (sqr x)) (+ (sqr (sqr y)) (* (sqr x) (sqr y))))
* * [misc]simplify:  iters left: 6 (9 enodes)
* * [misc]simplify:  iters left: 5 (17 enodes)
* * [misc]simplify:  iters left: 4 (32 enodes)
* * [misc]simplify:  iters left: 3 (50 enodes)
* * [misc]simplify:  iters left: 2 (73 enodes)
* * [misc]simplify:  iters left: 1 (83 enodes)
* [exit]simplify:  Simplified to (+ (* (+ (sqr x) (* y y)) (sqr x)) (* (* y y) (* y y)))
* [exit]simplify:  Simplified to (+ (* (+ (sqr x) (* y y)) (sqr x)) (* (* y y) (* y y)))
* * * * [misc]progress:  [ 12 / 16 ] simplifiying candidate #<alt-delta (λ (x y) (+ (sqr x) (- (sqr y))))>
* [enter]simplify:  Simplifying (- (sqr y))
* * [misc]simplify:  iters left: 3 (3 enodes)
* * [misc]simplify:  iters left: 2 (4 enodes)
* * [misc]simplify:  iters left: 1 (7 enodes)
* [exit]simplify:  Simplified to (* y (- y))
* [exit]simplify:  Simplified to (* y (- y))
* * * * [misc]progress:  [ 13 / 16 ] simplifiying candidate #<alt-delta (λ (x y) (* 1 (- (sqr x) (sqr y))))>
* * * * [misc]progress:  [ 14 / 16 ] simplifiying candidate #<alt-delta (λ (x y) (/ (- (sqr (sqr x)) (sqr (sqr y))) (+ (sqr x) (sqr y))))>
* [enter]simplify:  Simplifying (- (sqr (sqr x)) (sqr (sqr y)))
* * [misc]simplify:  iters left: 4 (7 enodes)
* * [misc]simplify:  iters left: 3 (14 enodes)
* * [misc]simplify:  iters left: 2 (23 enodes)
* * [misc]simplify:  iters left: 1 (39 enodes)
* [exit]simplify:  Simplified to (- (sqr (sqr x)) (* (* y y) (* y y)))
* [exit]simplify:  Simplified to (- (sqr (sqr x)) (* (* y y) (* y y)))
* [enter]simplify:  Simplifying (+ (sqr x) (sqr y))
* * [misc]simplify:  iters left: 3 (5 enodes)
* * [misc]simplify:  iters left: 2 (8 enodes)
* [exit]simplify:  Simplified to (+ (sqr y) (sqr x))
* [exit]simplify:  Simplified to (+ (sqr y) (sqr x))
* * * * [misc]progress:  [ 15 / 16 ] simplifiying candidate #<alt-delta (λ (x y) (* (+ x y) (- x y)))>
* [enter]simplify:  Simplifying (+ x y)
* * [misc]simplify:  iters left: 2 (3 enodes)
* * [misc]simplify:  iters left: 1 (4 enodes)
* [exit]simplify:  Simplified to (+ x y)
* [exit]simplify:  Simplified to (+ x y)
* [enter]simplify:  Simplifying (- x y)
* * [misc]simplify:  iters left: 2 (3 enodes)
* [exit]simplify:  Simplified to (- x y)
* [exit]simplify:  Simplified to (- x y)
* * * * [misc]progress:  [ 16 / 16 ] simplifiying candidate #<alt-delta (λ (x y) (* 1 (- (sqr x) (sqr y))))>
* [enter]simplify:  Simplifying (- (sqr x) (sqr y))
* * [misc]simplify:  iters left: 3 (5 enodes)
* * [misc]simplify:  iters left: 2 (10 enodes)
* * [misc]simplify:  iters left: 1 (12 enodes)
* [exit]simplify:  Simplified to (- (sqr x) (sqr y))
* [exit]simplify:  Simplified to (- (sqr x) (sqr y))
* * * [misc]progress:  adding candidates to table
* * [misc]progress:  iteration 2 / 3
* * * [misc]progress:  picking best candidate
* * * * [misc]pick:  Picked  #<alt-delta (λ (x y) (* (+ x y) (- x y)))>
* * * [misc]progress:  localizing error
* * * [misc]progress:  generating series expansions
* * * [misc]progress:  generating rewritten candidates
* * * [misc]progress:  simplifying candidates
* * * [misc]progress:  adding candidates to table
* [misc]progress:  [Phase 3 of 3] Extracting.
* [enter]simplify:  Simplifying (+ x y)
* * [misc]simplify:  iters left: 2 (3 enodes)
* * [misc]simplify:  iters left: 1 (4 enodes)
* [exit]simplify:  Simplified to (+ x y)
* [exit]simplify:  Simplified to (+ x y)
* [enter]simplify:  Simplifying (- x y)
* * [misc]simplify:  iters left: 2 (3 enodes)
* [exit]simplify:  Simplified to (- x y)
* [exit]simplify:  Simplified to (- x y)