\sin \left({\left(\sqrt{\tan^{-1}_* \frac{b}{b}}\right)}^{\left(b - a\right)}\right)double f(double a, double b) {
double r8017 = b;
double r8018 = atan2(r8017, r8017);
double r8019 = sqrt(r8018);
double r8020 = a;
double r8021 = r8017 - r8020;
double r8022 = pow(r8019, r8021);
double r8023 = sin(r8022);
return r8023;
}