Cannot sample enough valid points. (more)

\[\left|\left(\left(\tan^{-1}_* \frac{\mathsf{expm1}\left(\sin \left(\mathsf{expm1}\left(a\right)\right)\right)}{\tan^{-1} a}\right) \bmod a\right)\right|\]
\left|\left(\left(\tan^{-1}_* \frac{\mathsf{expm1}\left(\sin \left(\mathsf{expm1}\left(a\right)\right)\right)}{\tan^{-1} a}\right) \bmod a\right)\right|
double f(double a) {
        double r7979 = a;
        double r7980 = expm1(r7979);
        double r7981 = sin(r7980);
        double r7982 = expm1(r7981);
        double r7983 = atan(r7979);
        double r7984 = atan2(r7982, r7983);
        double r7985 = fmod(r7984, r7979);
        double r7986 = fabs(r7985);
        return r7986;
}