\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 r7962 = a;
double r7963 = expm1(r7962);
double r7964 = sin(r7963);
double r7965 = expm1(r7964);
double r7966 = atan(r7962);
double r7967 = atan2(r7965, r7966);
double r7968 = fmod(r7967, r7962);
double r7969 = fabs(r7968);
return r7969;
}