\sin \left({\left(\sqrt{\tan^{-1}_* \frac{b}{b}}\right)}^{\left(b - a\right)}\right)double f(double a, double b) {
double r7968 = b;
double r7969 = atan2(r7968, r7968);
double r7970 = sqrt(r7969);
double r7971 = a;
double r7972 = r7968 - r7971;
double r7973 = pow(r7970, r7972);
double r7974 = sin(r7973);
return r7974;
}