0.648 * [progress]: [Phase 1 of 3] Setting up.
0.001 * * * [progress]: [1/2] Preparing points
0.019 * * * [progress]: [2/2] Setting up program.
0.022 * [progress]: [Phase 2 of 3] Improving.
0.022 * [simplify]: Simplifying using  #<procedure:simplify-batch-regraph> :
   (/ (- (* x x) (* (* y 4.0) y)) (+ (* x x) (* (* y 4.0) y)))
0.023 * * [simplify]: iteration  0 :  9  enodes  (cost  19 )
0.024 * * [simplify]: iteration  1 :  17  enodes  (cost  19 )
0.027 * * [simplify]: iteration  2 :  35  enodes  (cost  19 )
0.031 * * [simplify]: iteration  3 :  70  enodes  (cost  19 )
0.041 * * [simplify]: iteration  4 :  119  enodes  (cost  19 )
0.057 * * [simplify]: iteration  5 :  167  enodes  (cost  19 )
0.082 * * [simplify]: iteration  6 :  187  enodes  (cost  19 )
0.110 * * [simplify]: iteration  7 :  188  enodes  (cost  19 )
0.138 * * [simplify]: iteration  done :  188  enodes  (cost  19 )
0.138 * [simplify]: Simplified to:
   (/ (- (* x x) (* (* y 4.0) y)) (+ (* x x) (* (* y 4.0) y)))
0.138 * * [progress]: iteration 1 / 4
0.138 * * * [progress]: picking best candidate
0.140 * * * * [pick]: Picked  #<alt (λ (x y) (/ (- (* x x) (* (* y 4.0) y)) (+ (* x x) (* (* y 4.0) y))))>
0.140 * * * [progress]: localizing error
0.147 * * * [progress]: generating rewritten candidates
0.147 * * * * [progress]: [ 1 / 2 ] rewriting at (2)
0.157 * * * * [progress]: [ 2 / 2 ] rewriting at (2 1)
0.161 * * * [progress]: generating series expansions
0.161 * * * * [progress]: [ 1 / 2 ] generating series at (2)
0.163 * [approximate]: Taking taylor expansion of (/ (- (pow x 2) (* 4.0 (pow y 2))) (+ (pow x 2) (* 4.0 (pow y 2)))) in (x y) around 0
0.163 * [taylor]: Taking taylor expansion of (/ (- (pow x 2) (* 4.0 (pow y 2))) (+ (pow x 2) (* 4.0 (pow y 2)))) in y
0.163 * [taylor]: Taking taylor expansion of (- (pow x 2) (* 4.0 (pow y 2))) in y
0.163 * [taylor]: Taking taylor expansion of (pow x 2) in y
0.163 * [taylor]: Taking taylor expansion of x in y
0.163 * [taylor]: Taking taylor expansion of (* 4.0 (pow y 2)) in y
0.163 * [taylor]: Taking taylor expansion of 4.0 in y
0.163 * [taylor]: Taking taylor expansion of (pow y 2) in y
0.163 * [taylor]: Taking taylor expansion of y in y
0.163 * [taylor]: Taking taylor expansion of (+ (pow x 2) (* 4.0 (pow y 2))) in y
0.163 * [taylor]: Taking taylor expansion of (pow x 2) in y
0.163 * [taylor]: Taking taylor expansion of x in y
0.163 * [taylor]: Taking taylor expansion of (* 4.0 (pow y 2)) in y
0.163 * [taylor]: Taking taylor expansion of 4.0 in y
0.163 * [taylor]: Taking taylor expansion of (pow y 2) in y
0.163 * [taylor]: Taking taylor expansion of y in y
0.164 * [taylor]: Taking taylor expansion of (/ (- (pow x 2) (* 4.0 (pow y 2))) (+ (pow x 2) (* 4.0 (pow y 2)))) in x
0.164 * [taylor]: Taking taylor expansion of (- (pow x 2) (* 4.0 (pow y 2))) in x
0.164 * [taylor]: Taking taylor expansion of (pow x 2) in x
0.164 * [taylor]: Taking taylor expansion of x in x
0.164 * [taylor]: Taking taylor expansion of (* 4.0 (pow y 2)) in x
0.164 * [taylor]: Taking taylor expansion of 4.0 in x
0.164 * [taylor]: Taking taylor expansion of (pow y 2) in x
0.164 * [taylor]: Taking taylor expansion of y in x
0.164 * [taylor]: Taking taylor expansion of (+ (pow x 2) (* 4.0 (pow y 2))) in x
0.164 * [taylor]: Taking taylor expansion of (pow x 2) in x
0.164 * [taylor]: Taking taylor expansion of x in x
0.164 * [taylor]: Taking taylor expansion of (* 4.0 (pow y 2)) in x
0.164 * [taylor]: Taking taylor expansion of 4.0 in x
0.164 * [taylor]: Taking taylor expansion of (pow y 2) in x
0.164 * [taylor]: Taking taylor expansion of y in x
0.164 * [taylor]: Taking taylor expansion of (/ (- (pow x 2) (* 4.0 (pow y 2))) (+ (pow x 2) (* 4.0 (pow y 2)))) in x
0.165 * [taylor]: Taking taylor expansion of (- (pow x 2) (* 4.0 (pow y 2))) in x
0.165 * [taylor]: Taking taylor expansion of (pow x 2) in x
0.165 * [taylor]: Taking taylor expansion of x in x
0.165 * [taylor]: Taking taylor expansion of (* 4.0 (pow y 2)) in x
0.165 * [taylor]: Taking taylor expansion of 4.0 in x
0.165 * [taylor]: Taking taylor expansion of (pow y 2) in x
0.165 * [taylor]: Taking taylor expansion of y in x
0.165 * [taylor]: Taking taylor expansion of (+ (pow x 2) (* 4.0 (pow y 2))) in x
0.165 * [taylor]: Taking taylor expansion of (pow x 2) in x
0.165 * [taylor]: Taking taylor expansion of x in x
0.165 * [taylor]: Taking taylor expansion of (* 4.0 (pow y 2)) in x
0.165 * [taylor]: Taking taylor expansion of 4.0 in x
0.165 * [taylor]: Taking taylor expansion of (pow y 2) in x
0.165 * [taylor]: Taking taylor expansion of y in x
0.165 * [taylor]: Taking taylor expansion of -1.0 in y
0.167 * [taylor]: Taking taylor expansion of 0 in y
0.171 * [taylor]: Taking taylor expansion of (* 0.5 (/ 1 (pow y 2))) in y
0.171 * [taylor]: Taking taylor expansion of 0.5 in y
0.171 * [taylor]: Taking taylor expansion of (/ 1 (pow y 2)) in y
0.171 * [taylor]: Taking taylor expansion of (pow y 2) in y
0.171 * [taylor]: Taking taylor expansion of y in y
0.178 * [taylor]: Taking taylor expansion of 0 in y
0.178 * [approximate]: Taking taylor expansion of (/ (- (/ 1 (pow x 2)) (* 4.0 (/ 1 (pow y 2)))) (+ (/ 1 (pow x 2)) (* 4.0 (/ 1 (pow y 2))))) in (x y) around 0
0.178 * [taylor]: Taking taylor expansion of (/ (- (/ 1 (pow x 2)) (* 4.0 (/ 1 (pow y 2)))) (+ (/ 1 (pow x 2)) (* 4.0 (/ 1 (pow y 2))))) in y
0.178 * [taylor]: Taking taylor expansion of (- (/ 1 (pow x 2)) (* 4.0 (/ 1 (pow y 2)))) in y
0.178 * [taylor]: Taking taylor expansion of (/ 1 (pow x 2)) in y
0.178 * [taylor]: Taking taylor expansion of (pow x 2) in y
0.178 * [taylor]: Taking taylor expansion of x in y
0.178 * [taylor]: Taking taylor expansion of (* 4.0 (/ 1 (pow y 2))) in y
0.179 * [taylor]: Taking taylor expansion of 4.0 in y
0.179 * [taylor]: Taking taylor expansion of (/ 1 (pow y 2)) in y
0.179 * [taylor]: Taking taylor expansion of (pow y 2) in y
0.179 * [taylor]: Taking taylor expansion of y in y
0.179 * [taylor]: Taking taylor expansion of (+ (/ 1 (pow x 2)) (* 4.0 (/ 1 (pow y 2)))) in y
0.179 * [taylor]: Taking taylor expansion of (/ 1 (pow x 2)) in y
0.179 * [taylor]: Taking taylor expansion of (pow x 2) in y
0.179 * [taylor]: Taking taylor expansion of x in y
0.179 * [taylor]: Taking taylor expansion of (* 4.0 (/ 1 (pow y 2))) in y
0.179 * [taylor]: Taking taylor expansion of 4.0 in y
0.179 * [taylor]: Taking taylor expansion of (/ 1 (pow y 2)) in y
0.179 * [taylor]: Taking taylor expansion of (pow y 2) in y
0.179 * [taylor]: Taking taylor expansion of y in y
0.182 * [taylor]: Taking taylor expansion of (/ (- (/ 1 (pow x 2)) (* 4.0 (/ 1 (pow y 2)))) (+ (/ 1 (pow x 2)) (* 4.0 (/ 1 (pow y 2))))) in x
0.182 * [taylor]: Taking taylor expansion of (- (/ 1 (pow x 2)) (* 4.0 (/ 1 (pow y 2)))) in x
0.182 * [taylor]: Taking taylor expansion of (/ 1 (pow x 2)) in x
0.182 * [taylor]: Taking taylor expansion of (pow x 2) in x
0.182 * [taylor]: Taking taylor expansion of x in x
0.182 * [taylor]: Taking taylor expansion of (* 4.0 (/ 1 (pow y 2))) in x
0.182 * [taylor]: Taking taylor expansion of 4.0 in x
0.182 * [taylor]: Taking taylor expansion of (/ 1 (pow y 2)) in x
0.182 * [taylor]: Taking taylor expansion of (pow y 2) in x
0.182 * [taylor]: Taking taylor expansion of y in x
0.183 * [taylor]: Taking taylor expansion of (+ (/ 1 (pow x 2)) (* 4.0 (/ 1 (pow y 2)))) in x
0.183 * [taylor]: Taking taylor expansion of (/ 1 (pow x 2)) in x
0.183 * [taylor]: Taking taylor expansion of (pow x 2) in x
0.183 * [taylor]: Taking taylor expansion of x in x
0.183 * [taylor]: Taking taylor expansion of (* 4.0 (/ 1 (pow y 2))) in x
0.183 * [taylor]: Taking taylor expansion of 4.0 in x
0.183 * [taylor]: Taking taylor expansion of (/ 1 (pow y 2)) in x
0.183 * [taylor]: Taking taylor expansion of (pow y 2) in x
0.183 * [taylor]: Taking taylor expansion of y in x
0.184 * [taylor]: Taking taylor expansion of (/ (- (/ 1 (pow x 2)) (* 4.0 (/ 1 (pow y 2)))) (+ (/ 1 (pow x 2)) (* 4.0 (/ 1 (pow y 2))))) in x
0.184 * [taylor]: Taking taylor expansion of (- (/ 1 (pow x 2)) (* 4.0 (/ 1 (pow y 2)))) in x
0.184 * [taylor]: Taking taylor expansion of (/ 1 (pow x 2)) in x
0.184 * [taylor]: Taking taylor expansion of (pow x 2) in x
0.184 * [taylor]: Taking taylor expansion of x in x
0.185 * [taylor]: Taking taylor expansion of (* 4.0 (/ 1 (pow y 2))) in x
0.185 * [taylor]: Taking taylor expansion of 4.0 in x
0.185 * [taylor]: Taking taylor expansion of (/ 1 (pow y 2)) in x
0.185 * [taylor]: Taking taylor expansion of (pow y 2) in x
0.185 * [taylor]: Taking taylor expansion of y in x
0.185 * [taylor]: Taking taylor expansion of (+ (/ 1 (pow x 2)) (* 4.0 (/ 1 (pow y 2)))) in x
0.185 * [taylor]: Taking taylor expansion of (/ 1 (pow x 2)) in x
0.185 * [taylor]: Taking taylor expansion of (pow x 2) in x
0.185 * [taylor]: Taking taylor expansion of x in x
0.185 * [taylor]: Taking taylor expansion of (* 4.0 (/ 1 (pow y 2))) in x
0.185 * [taylor]: Taking taylor expansion of 4.0 in x
0.185 * [taylor]: Taking taylor expansion of (/ 1 (pow y 2)) in x
0.185 * [taylor]: Taking taylor expansion of (pow y 2) in x
0.185 * [taylor]: Taking taylor expansion of y in x
0.186 * [taylor]: Taking taylor expansion of 1 in y
0.189 * [taylor]: Taking taylor expansion of 0 in y
0.192 * [taylor]: Taking taylor expansion of (- (* 8.0 (/ 1 (pow y 2)))) in y
0.192 * [taylor]: Taking taylor expansion of (* 8.0 (/ 1 (pow y 2))) in y
0.192 * [taylor]: Taking taylor expansion of 8.0 in y
0.192 * [taylor]: Taking taylor expansion of (/ 1 (pow y 2)) in y
0.192 * [taylor]: Taking taylor expansion of (pow y 2) in y
0.192 * [taylor]: Taking taylor expansion of y in y
0.200 * [taylor]: Taking taylor expansion of 0 in y
0.201 * [approximate]: Taking taylor expansion of (/ (- (/ 1 (pow x 2)) (* 4.0 (/ 1 (pow y 2)))) (+ (/ 1 (pow x 2)) (* 4.0 (/ 1 (pow y 2))))) in (x y) around 0
0.201 * [taylor]: Taking taylor expansion of (/ (- (/ 1 (pow x 2)) (* 4.0 (/ 1 (pow y 2)))) (+ (/ 1 (pow x 2)) (* 4.0 (/ 1 (pow y 2))))) in y
0.201 * [taylor]: Taking taylor expansion of (- (/ 1 (pow x 2)) (* 4.0 (/ 1 (pow y 2)))) in y
0.201 * [taylor]: Taking taylor expansion of (/ 1 (pow x 2)) in y
0.201 * [taylor]: Taking taylor expansion of (pow x 2) in y
0.201 * [taylor]: Taking taylor expansion of x in y
0.201 * [taylor]: Taking taylor expansion of (* 4.0 (/ 1 (pow y 2))) in y
0.201 * [taylor]: Taking taylor expansion of 4.0 in y
0.201 * [taylor]: Taking taylor expansion of (/ 1 (pow y 2)) in y
0.201 * [taylor]: Taking taylor expansion of (pow y 2) in y
0.201 * [taylor]: Taking taylor expansion of y in y
0.201 * [taylor]: Taking taylor expansion of (+ (/ 1 (pow x 2)) (* 4.0 (/ 1 (pow y 2)))) in y
0.201 * [taylor]: Taking taylor expansion of (/ 1 (pow x 2)) in y
0.202 * [taylor]: Taking taylor expansion of (pow x 2) in y
0.202 * [taylor]: Taking taylor expansion of x in y
0.202 * [taylor]: Taking taylor expansion of (* 4.0 (/ 1 (pow y 2))) in y
0.202 * [taylor]: Taking taylor expansion of 4.0 in y
0.202 * [taylor]: Taking taylor expansion of (/ 1 (pow y 2)) in y
0.202 * [taylor]: Taking taylor expansion of (pow y 2) in y
0.202 * [taylor]: Taking taylor expansion of y in y
0.204 * [taylor]: Taking taylor expansion of (/ (- (/ 1 (pow x 2)) (* 4.0 (/ 1 (pow y 2)))) (+ (/ 1 (pow x 2)) (* 4.0 (/ 1 (pow y 2))))) in x
0.204 * [taylor]: Taking taylor expansion of (- (/ 1 (pow x 2)) (* 4.0 (/ 1 (pow y 2)))) in x
0.204 * [taylor]: Taking taylor expansion of (/ 1 (pow x 2)) in x
0.204 * [taylor]: Taking taylor expansion of (pow x 2) in x
0.204 * [taylor]: Taking taylor expansion of x in x
0.205 * [taylor]: Taking taylor expansion of (* 4.0 (/ 1 (pow y 2))) in x
0.205 * [taylor]: Taking taylor expansion of 4.0 in x
0.205 * [taylor]: Taking taylor expansion of (/ 1 (pow y 2)) in x
0.205 * [taylor]: Taking taylor expansion of (pow y 2) in x
0.205 * [taylor]: Taking taylor expansion of y in x
0.205 * [taylor]: Taking taylor expansion of (+ (/ 1 (pow x 2)) (* 4.0 (/ 1 (pow y 2)))) in x
0.205 * [taylor]: Taking taylor expansion of (/ 1 (pow x 2)) in x
0.205 * [taylor]: Taking taylor expansion of (pow x 2) in x
0.205 * [taylor]: Taking taylor expansion of x in x
0.206 * [taylor]: Taking taylor expansion of (* 4.0 (/ 1 (pow y 2))) in x
0.206 * [taylor]: Taking taylor expansion of 4.0 in x
0.206 * [taylor]: Taking taylor expansion of (/ 1 (pow y 2)) in x
0.206 * [taylor]: Taking taylor expansion of (pow y 2) in x
0.206 * [taylor]: Taking taylor expansion of y in x
0.206 * [taylor]: Taking taylor expansion of (/ (- (/ 1 (pow x 2)) (* 4.0 (/ 1 (pow y 2)))) (+ (/ 1 (pow x 2)) (* 4.0 (/ 1 (pow y 2))))) in x
0.207 * [taylor]: Taking taylor expansion of (- (/ 1 (pow x 2)) (* 4.0 (/ 1 (pow y 2)))) in x
0.207 * [taylor]: Taking taylor expansion of (/ 1 (pow x 2)) in x
0.207 * [taylor]: Taking taylor expansion of (pow x 2) in x
0.207 * [taylor]: Taking taylor expansion of x in x
0.207 * [taylor]: Taking taylor expansion of (* 4.0 (/ 1 (pow y 2))) in x
0.207 * [taylor]: Taking taylor expansion of 4.0 in x
0.207 * [taylor]: Taking taylor expansion of (/ 1 (pow y 2)) in x
0.207 * [taylor]: Taking taylor expansion of (pow y 2) in x
0.207 * [taylor]: Taking taylor expansion of y in x
0.207 * [taylor]: Taking taylor expansion of (+ (/ 1 (pow x 2)) (* 4.0 (/ 1 (pow y 2)))) in x
0.207 * [taylor]: Taking taylor expansion of (/ 1 (pow x 2)) in x
0.207 * [taylor]: Taking taylor expansion of (pow x 2) in x
0.207 * [taylor]: Taking taylor expansion of x in x
0.208 * [taylor]: Taking taylor expansion of (* 4.0 (/ 1 (pow y 2))) in x
0.208 * [taylor]: Taking taylor expansion of 4.0 in x
0.208 * [taylor]: Taking taylor expansion of (/ 1 (pow y 2)) in x
0.208 * [taylor]: Taking taylor expansion of (pow y 2) in x
0.208 * [taylor]: Taking taylor expansion of y in x
0.209 * [taylor]: Taking taylor expansion of 1 in y
0.211 * [taylor]: Taking taylor expansion of 0 in y
0.214 * [taylor]: Taking taylor expansion of (- (* 8.0 (/ 1 (pow y 2)))) in y
0.214 * [taylor]: Taking taylor expansion of (* 8.0 (/ 1 (pow y 2))) in y
0.214 * [taylor]: Taking taylor expansion of 8.0 in y
0.214 * [taylor]: Taking taylor expansion of (/ 1 (pow y 2)) in y
0.214 * [taylor]: Taking taylor expansion of (pow y 2) in y
0.214 * [taylor]: Taking taylor expansion of y in y
0.223 * [taylor]: Taking taylor expansion of 0 in y
0.223 * * * * [progress]: [ 2 / 2 ] generating series at (2 1)
0.223 * [approximate]: Taking taylor expansion of (- (pow x 2) (* 4.0 (pow y 2))) in (x y) around 0
0.223 * [taylor]: Taking taylor expansion of (- (pow x 2) (* 4.0 (pow y 2))) in y
0.223 * [taylor]: Taking taylor expansion of (pow x 2) in y
0.223 * [taylor]: Taking taylor expansion of x in y
0.223 * [taylor]: Taking taylor expansion of (* 4.0 (pow y 2)) in y
0.223 * [taylor]: Taking taylor expansion of 4.0 in y
0.223 * [taylor]: Taking taylor expansion of (pow y 2) in y
0.223 * [taylor]: Taking taylor expansion of y in y
0.223 * [taylor]: Taking taylor expansion of (- (pow x 2) (* 4.0 (pow y 2))) in x
0.223 * [taylor]: Taking taylor expansion of (pow x 2) in x
0.223 * [taylor]: Taking taylor expansion of x in x
0.223 * [taylor]: Taking taylor expansion of (* 4.0 (pow y 2)) in x
0.223 * [taylor]: Taking taylor expansion of 4.0 in x
0.223 * [taylor]: Taking taylor expansion of (pow y 2) in x
0.223 * [taylor]: Taking taylor expansion of y in x
0.223 * [taylor]: Taking taylor expansion of (- (pow x 2) (* 4.0 (pow y 2))) in x
0.223 * [taylor]: Taking taylor expansion of (pow x 2) in x
0.223 * [taylor]: Taking taylor expansion of x in x
0.223 * [taylor]: Taking taylor expansion of (* 4.0 (pow y 2)) in x
0.223 * [taylor]: Taking taylor expansion of 4.0 in x
0.223 * [taylor]: Taking taylor expansion of (pow y 2) in x
0.223 * [taylor]: Taking taylor expansion of y in x
0.223 * [taylor]: Taking taylor expansion of (- (* 4.0 (pow y 2))) in y
0.223 * [taylor]: Taking taylor expansion of (* 4.0 (pow y 2)) in y
0.223 * [taylor]: Taking taylor expansion of 4.0 in y
0.224 * [taylor]: Taking taylor expansion of (pow y 2) in y
0.224 * [taylor]: Taking taylor expansion of y in y
0.224 * [taylor]: Taking taylor expansion of 0 in y
0.226 * [taylor]: Taking taylor expansion of 1 in y
0.229 * [taylor]: Taking taylor expansion of 0 in y
0.233 * [taylor]: Taking taylor expansion of 0 in y
0.233 * [approximate]: Taking taylor expansion of (- (/ 1 (pow x 2)) (* 4.0 (/ 1 (pow y 2)))) in (x y) around 0
0.233 * [taylor]: Taking taylor expansion of (- (/ 1 (pow x 2)) (* 4.0 (/ 1 (pow y 2)))) in y
0.233 * [taylor]: Taking taylor expansion of (/ 1 (pow x 2)) in y
0.233 * [taylor]: Taking taylor expansion of (pow x 2) in y
0.233 * [taylor]: Taking taylor expansion of x in y
0.234 * [taylor]: Taking taylor expansion of (* 4.0 (/ 1 (pow y 2))) in y
0.234 * [taylor]: Taking taylor expansion of 4.0 in y
0.234 * [taylor]: Taking taylor expansion of (/ 1 (pow y 2)) in y
0.234 * [taylor]: Taking taylor expansion of (pow y 2) in y
0.234 * [taylor]: Taking taylor expansion of y in y
0.234 * [taylor]: Taking taylor expansion of (- (/ 1 (pow x 2)) (* 4.0 (/ 1 (pow y 2)))) in x
0.234 * [taylor]: Taking taylor expansion of (/ 1 (pow x 2)) in x
0.234 * [taylor]: Taking taylor expansion of (pow x 2) in x
0.234 * [taylor]: Taking taylor expansion of x in x
0.235 * [taylor]: Taking taylor expansion of (* 4.0 (/ 1 (pow y 2))) in x
0.235 * [taylor]: Taking taylor expansion of 4.0 in x
0.235 * [taylor]: Taking taylor expansion of (/ 1 (pow y 2)) in x
0.235 * [taylor]: Taking taylor expansion of (pow y 2) in x
0.235 * [taylor]: Taking taylor expansion of y in x
0.235 * [taylor]: Taking taylor expansion of (- (/ 1 (pow x 2)) (* 4.0 (/ 1 (pow y 2)))) in x
0.235 * [taylor]: Taking taylor expansion of (/ 1 (pow x 2)) in x
0.235 * [taylor]: Taking taylor expansion of (pow x 2) in x
0.235 * [taylor]: Taking taylor expansion of x in x
0.235 * [taylor]: Taking taylor expansion of (* 4.0 (/ 1 (pow y 2))) in x
0.235 * [taylor]: Taking taylor expansion of 4.0 in x
0.235 * [taylor]: Taking taylor expansion of (/ 1 (pow y 2)) in x
0.235 * [taylor]: Taking taylor expansion of (pow y 2) in x
0.235 * [taylor]: Taking taylor expansion of y in x
0.236 * [taylor]: Taking taylor expansion of 1 in y
0.237 * [taylor]: Taking taylor expansion of 0 in y
0.238 * [taylor]: Taking taylor expansion of (- (* 4.0 (/ 1 (pow y 2)))) in y
0.238 * [taylor]: Taking taylor expansion of (* 4.0 (/ 1 (pow y 2))) in y
0.238 * [taylor]: Taking taylor expansion of 4.0 in y
0.238 * [taylor]: Taking taylor expansion of (/ 1 (pow y 2)) in y
0.238 * [taylor]: Taking taylor expansion of (pow y 2) in y
0.238 * [taylor]: Taking taylor expansion of y in y
0.242 * [taylor]: Taking taylor expansion of 0 in y
0.246 * [taylor]: Taking taylor expansion of 0 in y
0.253 * [approximate]: Taking taylor expansion of (- (/ 1 (pow x 2)) (* 4.0 (/ 1 (pow y 2)))) in (x y) around 0
0.253 * [taylor]: Taking taylor expansion of (- (/ 1 (pow x 2)) (* 4.0 (/ 1 (pow y 2)))) in y
0.253 * [taylor]: Taking taylor expansion of (/ 1 (pow x 2)) in y
0.253 * [taylor]: Taking taylor expansion of (pow x 2) in y
0.253 * [taylor]: Taking taylor expansion of x in y
0.253 * [taylor]: Taking taylor expansion of (* 4.0 (/ 1 (pow y 2))) in y
0.253 * [taylor]: Taking taylor expansion of 4.0 in y
0.253 * [taylor]: Taking taylor expansion of (/ 1 (pow y 2)) in y
0.253 * [taylor]: Taking taylor expansion of (pow y 2) in y
0.253 * [taylor]: Taking taylor expansion of y in y
0.254 * [taylor]: Taking taylor expansion of (- (/ 1 (pow x 2)) (* 4.0 (/ 1 (pow y 2)))) in x
0.254 * [taylor]: Taking taylor expansion of (/ 1 (pow x 2)) in x
0.254 * [taylor]: Taking taylor expansion of (pow x 2) in x
0.254 * [taylor]: Taking taylor expansion of x in x
0.254 * [taylor]: Taking taylor expansion of (* 4.0 (/ 1 (pow y 2))) in x
0.254 * [taylor]: Taking taylor expansion of 4.0 in x
0.254 * [taylor]: Taking taylor expansion of (/ 1 (pow y 2)) in x
0.254 * [taylor]: Taking taylor expansion of (pow y 2) in x
0.254 * [taylor]: Taking taylor expansion of y in x
0.255 * [taylor]: Taking taylor expansion of (- (/ 1 (pow x 2)) (* 4.0 (/ 1 (pow y 2)))) in x
0.255 * [taylor]: Taking taylor expansion of (/ 1 (pow x 2)) in x
0.255 * [taylor]: Taking taylor expansion of (pow x 2) in x
0.255 * [taylor]: Taking taylor expansion of x in x
0.255 * [taylor]: Taking taylor expansion of (* 4.0 (/ 1 (pow y 2))) in x
0.255 * [taylor]: Taking taylor expansion of 4.0 in x
0.255 * [taylor]: Taking taylor expansion of (/ 1 (pow y 2)) in x
0.255 * [taylor]: Taking taylor expansion of (pow y 2) in x
0.255 * [taylor]: Taking taylor expansion of y in x
0.256 * [taylor]: Taking taylor expansion of 1 in y
0.257 * [taylor]: Taking taylor expansion of 0 in y
0.258 * [taylor]: Taking taylor expansion of (- (* 4.0 (/ 1 (pow y 2)))) in y
0.258 * [taylor]: Taking taylor expansion of (* 4.0 (/ 1 (pow y 2))) in y
0.258 * [taylor]: Taking taylor expansion of 4.0 in y
0.258 * [taylor]: Taking taylor expansion of (/ 1 (pow y 2)) in y
0.258 * [taylor]: Taking taylor expansion of (pow y 2) in y
0.258 * [taylor]: Taking taylor expansion of y in y
0.262 * [taylor]: Taking taylor expansion of 0 in y
0.266 * [taylor]: Taking taylor expansion of 0 in y
0.269 * * * [progress]: simplifying candidates
0.270 * [simplify]: Simplifying using  #<procedure:simplify-batch-regraph> :
   (- (log (- (* x x) (* (* y 4.0) y))) (log (+ (* x x) (* (* y 4.0) y))))
  (log (/ (- (* x x) (* (* y 4.0) y)) (+ (* x x) (* (* y 4.0) y))))
  (exp (/ (- (* x x) (* (* y 4.0) y)) (+ (* x x) (* (* y 4.0) y))))
  (/ (* (* (- (* x x) (* (* y 4.0) y)) (- (* x x) (* (* y 4.0) y))) (- (* x x) (* (* y 4.0) y))) (* (* (+ (* x x) (* (* y 4.0) y)) (+ (* x x) (* (* y 4.0) y))) (+ (* x x) (* (* y 4.0) y))))
  (* (cbrt (/ (- (* x x) (* (* y 4.0) y)) (+ (* x x) (* (* y 4.0) y)))) (cbrt (/ (- (* x x) (* (* y 4.0) y)) (+ (* x x) (* (* y 4.0) y)))))
  (cbrt (/ (- (* x x) (* (* y 4.0) y)) (+ (* x x) (* (* y 4.0) y))))
  (* (* (/ (- (* x x) (* (* y 4.0) y)) (+ (* x x) (* (* y 4.0) y))) (/ (- (* x x) (* (* y 4.0) y)) (+ (* x x) (* (* y 4.0) y)))) (/ (- (* x x) (* (* y 4.0) y)) (+ (* x x) (* (* y 4.0) y))))
  (sqrt (/ (- (* x x) (* (* y 4.0) y)) (+ (* x x) (* (* y 4.0) y))))
  (sqrt (/ (- (* x x) (* (* y 4.0) y)) (+ (* x x) (* (* y 4.0) y))))
  (- (- (* x x) (* (* y 4.0) y)))
  (- (+ (* x x) (* (* y 4.0) y)))
  (/ (* x x) (+ (* x x) (* (* y 4.0) y)))
  (/ (* (* y 4.0) y) (+ (* x x) (* (* y 4.0) y)))
  (/ (* (cbrt (- (* x x) (* (* y 4.0) y))) (cbrt (- (* x x) (* (* y 4.0) y)))) (* (cbrt (+ (* x x) (* (* y 4.0) y))) (cbrt (+ (* x x) (* (* y 4.0) y)))))
  (/ (cbrt (- (* x x) (* (* y 4.0) y))) (cbrt (+ (* x x) (* (* y 4.0) y))))
  (/ (* (cbrt (- (* x x) (* (* y 4.0) y))) (cbrt (- (* x x) (* (* y 4.0) y)))) (sqrt (+ (* x x) (* (* y 4.0) y))))
  (/ (cbrt (- (* x x) (* (* y 4.0) y))) (sqrt (+ (* x x) (* (* y 4.0) y))))
  (/ (* (cbrt (- (* x x) (* (* y 4.0) y))) (cbrt (- (* x x) (* (* y 4.0) y)))) 1)
  (/ (cbrt (- (* x x) (* (* y 4.0) y))) (+ (* x x) (* (* y 4.0) y)))
  (/ (sqrt (- (* x x) (* (* y 4.0) y))) (* (cbrt (+ (* x x) (* (* y 4.0) y))) (cbrt (+ (* x x) (* (* y 4.0) y)))))
  (/ (sqrt (- (* x x) (* (* y 4.0) y))) (cbrt (+ (* x x) (* (* y 4.0) y))))
  (/ (sqrt (- (* x x) (* (* y 4.0) y))) (sqrt (+ (* x x) (* (* y 4.0) y))))
  (/ (sqrt (- (* x x) (* (* y 4.0) y))) (sqrt (+ (* x x) (* (* y 4.0) y))))
  (/ (sqrt (- (* x x) (* (* y 4.0) y))) 1)
  (/ (sqrt (- (* x x) (* (* y 4.0) y))) (+ (* x x) (* (* y 4.0) y)))
  (/ 1 (* (cbrt (+ (* x x) (* (* y 4.0) y))) (cbrt (+ (* x x) (* (* y 4.0) y)))))
  (/ (- (* x x) (* (* y 4.0) y)) (cbrt (+ (* x x) (* (* y 4.0) y))))
  (/ 1 (sqrt (+ (* x x) (* (* y 4.0) y))))
  (/ (- (* x x) (* (* y 4.0) y)) (sqrt (+ (* x x) (* (* y 4.0) y))))
  (/ 1 1)
  (/ (- (* x x) (* (* y 4.0) y)) (+ (* x x) (* (* y 4.0) y)))
  (/ 1 (+ (* x x) (* (* y 4.0) y)))
  (/ (+ (* x x) (* (* y 4.0) y)) (- (* x x) (* (* y 4.0) y)))
  (/ (- (* x x) (* (* y 4.0) y)) (* (cbrt (+ (* x x) (* (* y 4.0) y))) (cbrt (+ (* x x) (* (* y 4.0) y)))))
  (/ (- (* x x) (* (* y 4.0) y)) (sqrt (+ (* x x) (* (* y 4.0) y))))
  (/ (- (* x x) (* (* y 4.0) y)) 1)
  (/ (+ (* x x) (* (* y 4.0) y)) (cbrt (- (* x x) (* (* y 4.0) y))))
  (/ (+ (* x x) (* (* y 4.0) y)) (sqrt (- (* x x) (* (* y 4.0) y))))
  (/ (+ (* x x) (* (* y 4.0) y)) (- (* x x) (* (* y 4.0) y)))
  (/ (- (* x x) (* (* y 4.0) y)) (+ (pow (* x x) 3) (pow (* (* y 4.0) y) 3)))
  (/ (- (* x x) (* (* y 4.0) y)) (- (* (* x x) (* x x)) (* (* (* y 4.0) y) (* (* y 4.0) y))))
  (* (+ (* x x) (* (* y 4.0) y)) (+ (* (* x x) (* x x)) (+ (* (* (* y 4.0) y) (* (* y 4.0) y)) (* (* x x) (* (* y 4.0) y)))))
  (* (+ (* x x) (* (* y 4.0) y)) (+ (* x x) (* (* y 4.0) y)))
  (/ (exp (* x x)) (exp (* (* y 4.0) y)))
  (log (- (* x x) (* (* y 4.0) y)))
  (exp (- (* x x) (* (* y 4.0) y)))
  (* (cbrt (- (* x x) (* (* y 4.0) y))) (cbrt (- (* x x) (* (* y 4.0) y))))
  (cbrt (- (* x x) (* (* y 4.0) y)))
  (* (* (- (* x x) (* (* y 4.0) y)) (- (* x x) (* (* y 4.0) y))) (- (* x x) (* (* y 4.0) y)))
  (sqrt (- (* x x) (* (* y 4.0) y)))
  (sqrt (- (* x x) (* (* y 4.0) y)))
  (- (pow (* x x) 3) (pow (* (* y 4.0) y) 3))
  (+ (* (* x x) (* x x)) (+ (* (* (* y 4.0) y) (* (* y 4.0) y)) (* (* x x) (* (* y 4.0) y))))
  (- (* (* y 4.0) y))
  (- (* (* x x) (* x x)) (* (* (* y 4.0) y) (* (* y 4.0) y)))
  (+ (* x x) (* (* y 4.0) y))
  (- (* (* y 4.0) y))
  -1.0
  1
  1
  (- (pow x 2) (* 4.0 (pow y 2)))
  (- (pow x 2) (* 4.0 (pow y 2)))
  (- (pow x 2) (* 4.0 (pow y 2)))
0.273 * * [simplify]: iteration  0 :  82  enodes  (cost  1196 )
0.287 * * [simplify]: iteration  1 :  219  enodes  (cost  1174 )
0.336 * * [simplify]: iteration  2 :  888  enodes  (cost  1060 )