Cannot sample enough valid points. (more)

\[\left|\left(\left(\tan^{-1}_* \frac{\mathsf{expm1}\left(\left(\sin \left(\mathsf{expm1}\left(a\right)\right)\right)\right)}{\tan^{-1} a}\right) \bmod a\right)\right|\]
\left|\left(\left(\tan^{-1}_* \frac{\mathsf{expm1}\left(\left(\sin \left(\mathsf{expm1}\left(a\right)\right)\right)\right)}{\tan^{-1} a}\right) \bmod a\right)\right|
double f(double a) {
        double r8005 = a;
        double r8006 = expm1(r8005);
        double r8007 = sin(r8006);
        double r8008 = expm1(r8007);
        double r8009 = atan(r8005);
        double r8010 = atan2(r8008, r8009);
        double r8011 = fmod(r8010, r8005);
        double r8012 = fabs(r8011);
        return r8012;
}