\frac{1}{x - 1} + \frac{x}{x + 1}\frac{1}{x - 1} + \frac{x}{1 + x}(FPCore (x) :precision binary64 (+ (/ 1.0 (- x 1.0)) (/ x (+ x 1.0))))
(FPCore (x) :precision binary64 (+ (/ 1.0 (- x 1.0)) (/ x (+ 1.0 x))))
double code(double x) {
return (1.0 / (x - 1.0)) + (x / (x + 1.0));
}
double code(double x) {
return (1.0 / (x - 1.0)) + (x / (1.0 + x));
}



Bits error versus x
Results
Initial program 0.0
Final simplification0.0
herbie shell --seed 2020253
(FPCore (x)
:name "Asymptote B"
:precision binary64
(+ (/ 1.0 (- x 1.0)) (/ x (+ x 1.0))))