Cannot sample enough valid points. (more)

\[\left|x\right| \lt 100\]
\[\frac{\sqrt{x - 1}}{x + 1} - \frac{\sqrt{x + 1}}{x - 1}\]
\frac{\sqrt{x - 1}}{x + 1} - \frac{\sqrt{x + 1}}{x - 1}
double f(double x) {
        double r57383 = x;
        double r57384 = 1.0;
        double r57385 = r57383 - r57384;
        double r57386 = sqrt(r57385);
        double r57387 = r57383 + r57384;
        double r57388 = r57386 / r57387;
        double r57389 = sqrt(r57387);
        double r57390 = r57389 / r57385;
        double r57391 = r57388 - r57390;
        return r57391;
}