\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 r7969 = a;
double r7970 = expm1(r7969);
double r7971 = sin(r7970);
double r7972 = expm1(r7971);
double r7973 = atan(r7969);
double r7974 = atan2(r7972, r7973);
double r7975 = fmod(r7974, r7969);
double r7976 = fabs(r7975);
return r7976;
}