0.937 * [progress]: [Phase 1 of 3] Setting up.
0.002 * * * [progress]: [1/2] Preparing points
0.280 * * * [progress]: [2/2] Setting up program.
0.283 * [progress]: [Phase 2 of 3] Improving.
0.287 * [simplify]: Simplifying using  #<procedure:simplify-batch-regraph> :
   (* 2.0 (atan (sqrt (/ (- 1.0 x) (+ 1.0 x)))))
0.290 * * [simplify]: iteration  0 :  9  enodes  (cost  11 )
0.294 * * [simplify]: iteration  1 :  16  enodes  (cost  11 )
0.296 * * [simplify]: iteration  2 :  19  enodes  (cost  11 )
0.298 * * [simplify]: iteration  3 :  21  enodes  (cost  11 )
0.300 * * [simplify]: iteration  done :  21  enodes  (cost  11 )
0.300 * [simplify]: Simplified to:
   (* 2.0 (atan (sqrt (/ (- 1.0 x) (+ 1.0 x)))))
0.302 * * [progress]: iteration 1 / 4
0.302 * * * [progress]: picking best candidate
0.304 * * * * [pick]: Picked  #<alt (λ (x) (* 2.0 (atan (sqrt (/ (- 1.0 x) (+ 1.0 x))))))>
0.304 * * * [progress]: localizing error
0.314 * * * [progress]: generating rewritten candidates
0.314 * * * * [progress]: [ 1 / 3 ] rewriting at (2 2 1)
0.326 * * * * [progress]: [ 2 / 3 ] rewriting at (2 2 1 1)
0.337 * * * * [progress]: [ 3 / 3 ] rewriting at (2 2)
0.341 * * * [progress]: generating series expansions
0.342 * * * * [progress]: [ 1 / 3 ] generating series at (2 2 1)
0.346 * [approximate]: Taking taylor expansion of (sqrt (/ (- 1.0 x) (+ x 1.0))) in (x) around 0
0.347 * [taylor]: Taking taylor expansion of (sqrt (/ (- 1.0 x) (+ x 1.0))) in x
0.347 * [taylor]: Taking taylor expansion of (/ (- 1.0 x) (+ x 1.0)) in x
0.347 * [taylor]: Taking taylor expansion of (- 1.0 x) in x
0.347 * [taylor]: Taking taylor expansion of 1.0 in x
0.347 * [taylor]: Taking taylor expansion of x in x
0.347 * [taylor]: Taking taylor expansion of (+ x 1.0) in x
0.347 * [taylor]: Taking taylor expansion of x in x
0.347 * [taylor]: Taking taylor expansion of 1.0 in x
0.354 * [taylor]: Taking taylor expansion of (sqrt (/ (- 1.0 x) (+ x 1.0))) in x
0.354 * [taylor]: Taking taylor expansion of (/ (- 1.0 x) (+ x 1.0)) in x
0.354 * [taylor]: Taking taylor expansion of (- 1.0 x) in x
0.354 * [taylor]: Taking taylor expansion of 1.0 in x
0.354 * [taylor]: Taking taylor expansion of x in x
0.354 * [taylor]: Taking taylor expansion of (+ x 1.0) in x
0.354 * [taylor]: Taking taylor expansion of x in x
0.354 * [taylor]: Taking taylor expansion of 1.0 in x
0.388 * [approximate]: Taking taylor expansion of (sqrt (/ (- 1.0 (/ 1 x)) (+ (/ 1 x) 1.0))) in (x) around 0
0.388 * [taylor]: Taking taylor expansion of (sqrt (/ (- 1.0 (/ 1 x)) (+ (/ 1 x) 1.0))) in x
0.388 * [taylor]: Taking taylor expansion of (/ (- 1.0 (/ 1 x)) (+ (/ 1 x) 1.0)) in x
0.388 * [taylor]: Taking taylor expansion of (- 1.0 (/ 1 x)) in x
0.388 * [taylor]: Taking taylor expansion of 1.0 in x
0.388 * [taylor]: Taking taylor expansion of (/ 1 x) in x
0.388 * [taylor]: Taking taylor expansion of x in x
0.389 * [taylor]: Taking taylor expansion of (+ (/ 1 x) 1.0) in x
0.389 * [taylor]: Taking taylor expansion of (/ 1 x) in x
0.389 * [taylor]: Taking taylor expansion of x in x
0.389 * [taylor]: Taking taylor expansion of 1.0 in x
0.395 * [taylor]: Taking taylor expansion of (sqrt (/ (- 1.0 (/ 1 x)) (+ (/ 1 x) 1.0))) in x
0.395 * [taylor]: Taking taylor expansion of (/ (- 1.0 (/ 1 x)) (+ (/ 1 x) 1.0)) in x
0.395 * [taylor]: Taking taylor expansion of (- 1.0 (/ 1 x)) in x
0.395 * [taylor]: Taking taylor expansion of 1.0 in x
0.395 * [taylor]: Taking taylor expansion of (/ 1 x) in x
0.395 * [taylor]: Taking taylor expansion of x in x
0.395 * [taylor]: Taking taylor expansion of (+ (/ 1 x) 1.0) in x
0.395 * [taylor]: Taking taylor expansion of (/ 1 x) in x
0.395 * [taylor]: Taking taylor expansion of x in x
0.395 * [taylor]: Taking taylor expansion of 1.0 in x
0.420 * [approximate]: Taking taylor expansion of (sqrt (/ (+ (/ 1 x) 1.0) (- 1.0 (/ 1 x)))) in (x) around 0
0.420 * [taylor]: Taking taylor expansion of (sqrt (/ (+ (/ 1 x) 1.0) (- 1.0 (/ 1 x)))) in x
0.420 * [taylor]: Taking taylor expansion of (/ (+ (/ 1 x) 1.0) (- 1.0 (/ 1 x))) in x
0.420 * [taylor]: Taking taylor expansion of (+ (/ 1 x) 1.0) in x
0.420 * [taylor]: Taking taylor expansion of (/ 1 x) in x
0.420 * [taylor]: Taking taylor expansion of x in x
0.420 * [taylor]: Taking taylor expansion of 1.0 in x
0.420 * [taylor]: Taking taylor expansion of (- 1.0 (/ 1 x)) in x
0.420 * [taylor]: Taking taylor expansion of 1.0 in x
0.420 * [taylor]: Taking taylor expansion of (/ 1 x) in x
0.420 * [taylor]: Taking taylor expansion of x in x
0.426 * [taylor]: Taking taylor expansion of (sqrt (/ (+ (/ 1 x) 1.0) (- 1.0 (/ 1 x)))) in x
0.426 * [taylor]: Taking taylor expansion of (/ (+ (/ 1 x) 1.0) (- 1.0 (/ 1 x))) in x
0.426 * [taylor]: Taking taylor expansion of (+ (/ 1 x) 1.0) in x
0.426 * [taylor]: Taking taylor expansion of (/ 1 x) in x
0.426 * [taylor]: Taking taylor expansion of x in x
0.426 * [taylor]: Taking taylor expansion of 1.0 in x
0.426 * [taylor]: Taking taylor expansion of (- 1.0 (/ 1 x)) in x
0.426 * [taylor]: Taking taylor expansion of 1.0 in x
0.426 * [taylor]: Taking taylor expansion of (/ 1 x) in x
0.427 * [taylor]: Taking taylor expansion of x in x
0.454 * * * * [progress]: [ 2 / 3 ] generating series at (2 2 1 1)
0.454 * [approximate]: Taking taylor expansion of (/ (- 1.0 x) (+ x 1.0)) in (x) around 0
0.454 * [taylor]: Taking taylor expansion of (/ (- 1.0 x) (+ x 1.0)) in x
0.455 * [taylor]: Taking taylor expansion of (- 1.0 x) in x
0.455 * [taylor]: Taking taylor expansion of 1.0 in x
0.455 * [taylor]: Taking taylor expansion of x in x
0.455 * [taylor]: Taking taylor expansion of (+ x 1.0) in x
0.455 * [taylor]: Taking taylor expansion of x in x
0.455 * [taylor]: Taking taylor expansion of 1.0 in x
0.456 * [taylor]: Taking taylor expansion of (/ (- 1.0 x) (+ x 1.0)) in x
0.456 * [taylor]: Taking taylor expansion of (- 1.0 x) in x
0.456 * [taylor]: Taking taylor expansion of 1.0 in x
0.456 * [taylor]: Taking taylor expansion of x in x
0.456 * [taylor]: Taking taylor expansion of (+ x 1.0) in x
0.456 * [taylor]: Taking taylor expansion of x in x
0.456 * [taylor]: Taking taylor expansion of 1.0 in x
0.463 * [approximate]: Taking taylor expansion of (/ (- 1.0 (/ 1 x)) (+ (/ 1 x) 1.0)) in (x) around 0
0.463 * [taylor]: Taking taylor expansion of (/ (- 1.0 (/ 1 x)) (+ (/ 1 x) 1.0)) in x
0.463 * [taylor]: Taking taylor expansion of (- 1.0 (/ 1 x)) in x
0.463 * [taylor]: Taking taylor expansion of 1.0 in x
0.463 * [taylor]: Taking taylor expansion of (/ 1 x) in x
0.463 * [taylor]: Taking taylor expansion of x in x
0.464 * [taylor]: Taking taylor expansion of (+ (/ 1 x) 1.0) in x
0.464 * [taylor]: Taking taylor expansion of (/ 1 x) in x
0.464 * [taylor]: Taking taylor expansion of x in x
0.464 * [taylor]: Taking taylor expansion of 1.0 in x
0.465 * [taylor]: Taking taylor expansion of (/ (- 1.0 (/ 1 x)) (+ (/ 1 x) 1.0)) in x
0.465 * [taylor]: Taking taylor expansion of (- 1.0 (/ 1 x)) in x
0.465 * [taylor]: Taking taylor expansion of 1.0 in x
0.465 * [taylor]: Taking taylor expansion of (/ 1 x) in x
0.465 * [taylor]: Taking taylor expansion of x in x
0.465 * [taylor]: Taking taylor expansion of (+ (/ 1 x) 1.0) in x
0.465 * [taylor]: Taking taylor expansion of (/ 1 x) in x
0.465 * [taylor]: Taking taylor expansion of x in x
0.466 * [taylor]: Taking taylor expansion of 1.0 in x
0.475 * [approximate]: Taking taylor expansion of (/ (+ (/ 1 x) 1.0) (- 1.0 (/ 1 x))) in (x) around 0
0.475 * [taylor]: Taking taylor expansion of (/ (+ (/ 1 x) 1.0) (- 1.0 (/ 1 x))) in x
0.475 * [taylor]: Taking taylor expansion of (+ (/ 1 x) 1.0) in x
0.475 * [taylor]: Taking taylor expansion of (/ 1 x) in x
0.475 * [taylor]: Taking taylor expansion of x in x
0.475 * [taylor]: Taking taylor expansion of 1.0 in x
0.475 * [taylor]: Taking taylor expansion of (- 1.0 (/ 1 x)) in x
0.475 * [taylor]: Taking taylor expansion of 1.0 in x
0.475 * [taylor]: Taking taylor expansion of (/ 1 x) in x
0.475 * [taylor]: Taking taylor expansion of x in x
0.477 * [taylor]: Taking taylor expansion of (/ (+ (/ 1 x) 1.0) (- 1.0 (/ 1 x))) in x
0.477 * [taylor]: Taking taylor expansion of (+ (/ 1 x) 1.0) in x
0.477 * [taylor]: Taking taylor expansion of (/ 1 x) in x
0.477 * [taylor]: Taking taylor expansion of x in x
0.477 * [taylor]: Taking taylor expansion of 1.0 in x
0.477 * [taylor]: Taking taylor expansion of (- 1.0 (/ 1 x)) in x
0.477 * [taylor]: Taking taylor expansion of 1.0 in x
0.477 * [taylor]: Taking taylor expansion of (/ 1 x) in x
0.477 * [taylor]: Taking taylor expansion of x in x
0.487 * * * * [progress]: [ 3 / 3 ] generating series at (2 2)
0.487 * [approximate]: Taking taylor expansion of (atan (sqrt (/ (- 1.0 x) (+ x 1.0)))) in (x) around 0
0.488 * [taylor]: Taking taylor expansion of (atan (sqrt (/ (- 1.0 x) (+ x 1.0)))) in x
0.489 * [taylor]: Taking taylor expansion of (atan (sqrt (/ (- 1.0 x) (+ x 1.0)))) in x
0.489 * [approximate]: Taking taylor expansion of (atan (sqrt (/ (- 1.0 (/ 1 x)) (+ (/ 1 x) 1.0)))) in (x) around 0
0.489 * [taylor]: Taking taylor expansion of (atan (sqrt (/ (- 1.0 (/ 1 x)) (+ (/ 1 x) 1.0)))) in x
0.489 * [taylor]: Taking taylor expansion of (atan (sqrt (/ (- 1.0 (/ 1 x)) (+ (/ 1 x) 1.0)))) in x
0.490 * [approximate]: Taking taylor expansion of (atan (sqrt (/ (+ (/ 1 x) 1.0) (- 1.0 (/ 1 x))))) in (x) around 0
0.490 * [taylor]: Taking taylor expansion of (atan (sqrt (/ (+ (/ 1 x) 1.0) (- 1.0 (/ 1 x))))) in x
0.490 * [taylor]: Taking taylor expansion of (atan (sqrt (/ (+ (/ 1 x) 1.0) (- 1.0 (/ 1 x))))) in x
0.491 * * * [progress]: simplifying candidates
0.492 * [simplify]: Simplifying using  #<procedure:simplify-batch-regraph> :
   (log (sqrt (/ (- 1.0 x) (+ 1.0 x))))
  (exp (sqrt (/ (- 1.0 x) (+ 1.0 x))))
  (* (cbrt (sqrt (/ (- 1.0 x) (+ 1.0 x)))) (cbrt (sqrt (/ (- 1.0 x) (+ 1.0 x)))))
  (cbrt (sqrt (/ (- 1.0 x) (+ 1.0 x))))
  (* (* (sqrt (/ (- 1.0 x) (+ 1.0 x))) (sqrt (/ (- 1.0 x) (+ 1.0 x)))) (sqrt (/ (- 1.0 x) (+ 1.0 x))))
  (sqrt (* (cbrt (/ (- 1.0 x) (+ 1.0 x))) (cbrt (/ (- 1.0 x) (+ 1.0 x)))))
  (sqrt (cbrt (/ (- 1.0 x) (+ 1.0 x))))
  (sqrt (sqrt (/ (- 1.0 x) (+ 1.0 x))))
  (sqrt (sqrt (/ (- 1.0 x) (+ 1.0 x))))
  (sqrt (/ (* (cbrt (- 1.0 x)) (cbrt (- 1.0 x))) (* (cbrt (+ 1.0 x)) (cbrt (+ 1.0 x)))))
  (sqrt (/ (cbrt (- 1.0 x)) (cbrt (+ 1.0 x))))
  (sqrt (/ (* (cbrt (- 1.0 x)) (cbrt (- 1.0 x))) (sqrt (+ 1.0 x))))
  (sqrt (/ (cbrt (- 1.0 x)) (sqrt (+ 1.0 x))))
  (sqrt (/ (* (cbrt (- 1.0 x)) (cbrt (- 1.0 x))) 1))
  (sqrt (/ (cbrt (- 1.0 x)) (+ 1.0 x)))
  (sqrt (/ (* (cbrt (- 1.0 x)) (cbrt (- 1.0 x))) 1))
  (sqrt (/ (cbrt (- 1.0 x)) (+ 1.0 x)))
  (sqrt (/ (sqrt (- 1.0 x)) (* (cbrt (+ 1.0 x)) (cbrt (+ 1.0 x)))))
  (sqrt (/ (sqrt (- 1.0 x)) (cbrt (+ 1.0 x))))
  (sqrt (/ (sqrt (- 1.0 x)) (sqrt (+ 1.0 x))))
  (sqrt (/ (sqrt (- 1.0 x)) (sqrt (+ 1.0 x))))
  (sqrt (/ (sqrt (- 1.0 x)) 1))
  (sqrt (/ (sqrt (- 1.0 x)) (+ 1.0 x)))
  (sqrt (/ (sqrt (- 1.0 x)) 1))
  (sqrt (/ (sqrt (- 1.0 x)) (+ 1.0 x)))
  (sqrt (/ 1 (* (cbrt (+ 1.0 x)) (cbrt (+ 1.0 x)))))
  (sqrt (/ (- 1.0 x) (cbrt (+ 1.0 x))))
  (sqrt (/ 1 (sqrt (+ 1.0 x))))
  (sqrt (/ (- 1.0 x) (sqrt (+ 1.0 x))))
  (sqrt (/ 1 1))
  (sqrt (/ (- 1.0 x) (+ 1.0 x)))
  (sqrt (/ 1 1))
  (sqrt (/ (- 1.0 x) (+ 1.0 x)))
  (sqrt (/ (+ (sqrt 1.0) (sqrt x)) (* (cbrt (+ 1.0 x)) (cbrt (+ 1.0 x)))))
  (sqrt (/ (- (sqrt 1.0) (sqrt x)) (cbrt (+ 1.0 x))))
  (sqrt (/ (+ (sqrt 1.0) (sqrt x)) (sqrt (+ 1.0 x))))
  (sqrt (/ (- (sqrt 1.0) (sqrt x)) (sqrt (+ 1.0 x))))
  (sqrt (/ (+ (sqrt 1.0) (sqrt x)) 1))
  (sqrt (/ (- (sqrt 1.0) (sqrt x)) (+ 1.0 x)))
  (sqrt (/ (+ (sqrt 1.0) (sqrt x)) 1))
  (sqrt (/ (- (sqrt 1.0) (sqrt x)) (+ 1.0 x)))
  (sqrt (/ 1 (* (cbrt (+ 1.0 x)) (cbrt (+ 1.0 x)))))
  (sqrt (/ (- 1.0 x) (cbrt (+ 1.0 x))))
  (sqrt (/ 1 (sqrt (+ 1.0 x))))
  (sqrt (/ (- 1.0 x) (sqrt (+ 1.0 x))))
  (sqrt (/ 1 1))
  (sqrt (/ (- 1.0 x) (+ 1.0 x)))
  (sqrt (/ 1 1))
  (sqrt (/ (- 1.0 x) (+ 1.0 x)))
  (sqrt 1)
  (sqrt (/ (- 1.0 x) (+ 1.0 x)))
  (sqrt (- 1.0 x))
  (sqrt (/ 1 (+ 1.0 x)))
  (sqrt (/ (- 1.0 x) (+ (pow 1.0 3) (pow x 3))))
  (sqrt (+ (* 1.0 1.0) (- (* x x) (* 1.0 x))))
  (sqrt (/ (- 1.0 x) (- (* 1.0 1.0) (* x x))))
  (sqrt (- 1.0 x))
  (sqrt (- 1.0 x))
  (sqrt (+ 1.0 x))
  (/ 1 2)
  (sqrt (sqrt (/ (- 1.0 x) (+ 1.0 x))))
  (sqrt (sqrt (/ (- 1.0 x) (+ 1.0 x))))
  (- (log (- 1.0 x)) (log (+ 1.0 x)))
  (log (/ (- 1.0 x) (+ 1.0 x)))
  (exp (/ (- 1.0 x) (+ 1.0 x)))
  (/ (* (* (- 1.0 x) (- 1.0 x)) (- 1.0 x)) (* (* (+ 1.0 x) (+ 1.0 x)) (+ 1.0 x)))
  (* (cbrt (/ (- 1.0 x) (+ 1.0 x))) (cbrt (/ (- 1.0 x) (+ 1.0 x))))
  (cbrt (/ (- 1.0 x) (+ 1.0 x)))
  (* (* (/ (- 1.0 x) (+ 1.0 x)) (/ (- 1.0 x) (+ 1.0 x))) (/ (- 1.0 x) (+ 1.0 x)))
  (sqrt (/ (- 1.0 x) (+ 1.0 x)))
  (sqrt (/ (- 1.0 x) (+ 1.0 x)))
  (- (- 1.0 x))
  (- (+ 1.0 x))
  (/ 1.0 (+ 1.0 x))
  (/ x (+ 1.0 x))
  (/ (* (cbrt (- 1.0 x)) (cbrt (- 1.0 x))) (* (cbrt (+ 1.0 x)) (cbrt (+ 1.0 x))))
  (/ (cbrt (- 1.0 x)) (cbrt (+ 1.0 x)))
  (/ (* (cbrt (- 1.0 x)) (cbrt (- 1.0 x))) (sqrt (+ 1.0 x)))
  (/ (cbrt (- 1.0 x)) (sqrt (+ 1.0 x)))
  (/ (* (cbrt (- 1.0 x)) (cbrt (- 1.0 x))) 1)
  (/ (cbrt (- 1.0 x)) (+ 1.0 x))
  (/ (* (cbrt (- 1.0 x)) (cbrt (- 1.0 x))) 1)
  (/ (cbrt (- 1.0 x)) (+ 1.0 x))
  (/ (sqrt (- 1.0 x)) (* (cbrt (+ 1.0 x)) (cbrt (+ 1.0 x))))
  (/ (sqrt (- 1.0 x)) (cbrt (+ 1.0 x)))
  (/ (sqrt (- 1.0 x)) (sqrt (+ 1.0 x)))
  (/ (sqrt (- 1.0 x)) (sqrt (+ 1.0 x)))
  (/ (sqrt (- 1.0 x)) 1)
  (/ (sqrt (- 1.0 x)) (+ 1.0 x))
  (/ (sqrt (- 1.0 x)) 1)
  (/ (sqrt (- 1.0 x)) (+ 1.0 x))
  (/ 1 (* (cbrt (+ 1.0 x)) (cbrt (+ 1.0 x))))
  (/ (- 1.0 x) (cbrt (+ 1.0 x)))
  (/ 1 (sqrt (+ 1.0 x)))
  (/ (- 1.0 x) (sqrt (+ 1.0 x)))
  (/ 1 1)
  (/ (- 1.0 x) (+ 1.0 x))
  (/ 1 1)
  (/ (- 1.0 x) (+ 1.0 x))
  (/ (+ (sqrt 1.0) (sqrt x)) (* (cbrt (+ 1.0 x)) (cbrt (+ 1.0 x))))
  (/ (- (sqrt 1.0) (sqrt x)) (cbrt (+ 1.0 x)))
  (/ (+ (sqrt 1.0) (sqrt x)) (sqrt (+ 1.0 x)))
  (/ (- (sqrt 1.0) (sqrt x)) (sqrt (+ 1.0 x)))
  (/ (+ (sqrt 1.0) (sqrt x)) 1)
  (/ (- (sqrt 1.0) (sqrt x)) (+ 1.0 x))
  (/ (+ (sqrt 1.0) (sqrt x)) 1)
  (/ (- (sqrt 1.0) (sqrt x)) (+ 1.0 x))
  (/ 1 (* (cbrt (+ 1.0 x)) (cbrt (+ 1.0 x))))
  (/ (- 1.0 x) (cbrt (+ 1.0 x)))
  (/ 1 (sqrt (+ 1.0 x)))
  (/ (- 1.0 x) (sqrt (+ 1.0 x)))
  (/ 1 1)
  (/ (- 1.0 x) (+ 1.0 x))
  (/ 1 1)
  (/ (- 1.0 x) (+ 1.0 x))
  (/ 1 (+ 1.0 x))
  (/ (+ 1.0 x) (- 1.0 x))
  (/ (- 1.0 x) (* (cbrt (+ 1.0 x)) (cbrt (+ 1.0 x))))
  (/ (- 1.0 x) (sqrt (+ 1.0 x)))
  (/ (- 1.0 x) 1)
  (/ (- 1.0 x) 1)
  (/ (+ 1.0 x) (cbrt (- 1.0 x)))
  (/ (+ 1.0 x) (sqrt (- 1.0 x)))
  (/ (+ 1.0 x) (- 1.0 x))
  (/ (+ 1.0 x) (- (sqrt 1.0) (sqrt x)))
  (/ (+ 1.0 x) (- 1.0 x))
  (/ (- 1.0 x) (+ (pow 1.0 3) (pow x 3)))
  (/ (- 1.0 x) (- (* 1.0 1.0) (* x x)))
  (* (+ 1.0 x) (+ (* 1.0 1.0) (+ (* x x) (* 1.0 x))))
  (* (+ 1.0 x) (+ 1.0 x))
  (log (atan (sqrt (/ (- 1.0 x) (+ 1.0 x)))))
  (exp (atan (sqrt (/ (- 1.0 x) (+ 1.0 x)))))
  (* (cbrt (atan (sqrt (/ (- 1.0 x) (+ 1.0 x))))) (cbrt (atan (sqrt (/ (- 1.0 x) (+ 1.0 x))))))
  (cbrt (atan (sqrt (/ (- 1.0 x) (+ 1.0 x)))))
  (* (* (atan (sqrt (/ (- 1.0 x) (+ 1.0 x)))) (atan (sqrt (/ (- 1.0 x) (+ 1.0 x))))) (atan (sqrt (/ (- 1.0 x) (+ 1.0 x)))))
  (sqrt (atan (sqrt (/ (- 1.0 x) (+ 1.0 x)))))
  (sqrt (atan (sqrt (/ (- 1.0 x) (+ 1.0 x)))))
  (- (+ (sqrt 1.0) (* 1.0 (/ (pow x 2) (sqrt 1.0)))) (+ (* 0.5 (/ (pow x 2) (pow (sqrt 1.0) 3))) (* 1.0 (/ x (sqrt 1.0)))))
  (- (+ (* 1.0 (/ 1 (* x (sqrt -1)))) (sqrt -1)) (+ (* 1.0 (/ 1 (* (pow x 2) (sqrt -1)))) (* 0.5 (/ 1 (* (pow x 2) (pow (sqrt -1) 3))))))
  (- (+ (* 1.0 (/ 1 (* x (sqrt -1)))) (sqrt -1)) (+ (* 1.0 (/ 1 (* (pow x 2) (sqrt -1)))) (* 0.5 (/ 1 (* (pow x 2) (pow (sqrt -1) 3))))))
  (- (+ (* 2.0 (pow x 2)) 1.0) (* 2.0 x))
  (- (* 2.0 (/ 1 x)) (+ 1 (* 2.0 (/ 1 (pow x 2)))))
  (- (* 2.0 (/ 1 x)) (+ 1 (* 2.0 (/ 1 (pow x 2)))))
  (atan (sqrt (/ (- 1.0 x) (+ x 1.0))))
  (atan (sqrt (/ (- 1.0 x) (+ x 1.0))))
  (atan (sqrt (/ (- 1.0 x) (+ x 1.0))))
0.497 * * [simplify]: iteration  0 :  167  enodes  (cost  1451 )
0.528 * * [simplify]: iteration  1 :  358  enodes  (cost  1376 )