\sin \left({\left(\sqrt{\tan^{-1}_* \frac{b}{b}}\right)}^{\left(b - a\right)}\right)double f(double a, double b) {
double r7961 = b;
double r7962 = atan2(r7961, r7961);
double r7963 = sqrt(r7962);
double r7964 = a;
double r7965 = r7961 - r7964;
double r7966 = pow(r7963, r7965);
double r7967 = sin(r7966);
return r7967;
}