\sin \left({\left(\sqrt{\tan^{-1}_* \frac{b}{b}}\right)}^{\left(b - a\right)}\right)double f(double a, double b) {
double r7995 = b;
double r7996 = atan2(r7995, r7995);
double r7997 = sqrt(r7996);
double r7998 = a;
double r7999 = r7995 - r7998;
double r8000 = pow(r7997, r7999);
double r8001 = sin(r8000);
return r8001;
}