\sin \left({\left(\sqrt{\tan^{-1}_* \frac{b}{b}}\right)}^{\left(b - a\right)}\right)double f(double a, double b) {
double r8034 = b;
double r8035 = atan2(r8034, r8034);
double r8036 = sqrt(r8035);
double r8037 = a;
double r8038 = r8034 - r8037;
double r8039 = pow(r8036, r8038);
double r8040 = sin(r8039);
return r8040;
}