Timeout in 10.0m

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\[\frac{x}{x + 1} - \frac{x + 1}{x - 1}\]
\frac{x}{x + 1} - \frac{x + 1}{x - 1}
double f(double x) {
        double r1770739 = x;
        double r1770740 = 1.0;
        double r1770741 = r1770739 + r1770740;
        double r1770742 = r1770739 / r1770741;
        double r1770743 = r1770739 - r1770740;
        double r1770744 = r1770741 / r1770743;
        double r1770745 = r1770742 - r1770744;
        return r1770745;
}

Reproduce

herbie shell --seed 2019305 
(FPCore (x)
  :name "Asymptote C"
  :precision binary64
  (- (/ x (+ x 1)) (/ (+ x 1) (- x 1))))