\sin \left({\left(\sqrt{\tan^{-1}_* \frac{b}{b}}\right)}^{\left(b - a\right)}\right)double f(double a, double b) {
double r8009 = b;
double r8010 = atan2(r8009, r8009);
double r8011 = sqrt(r8010);
double r8012 = a;
double r8013 = r8009 - r8012;
double r8014 = pow(r8011, r8013);
double r8015 = sin(r8014);
return r8015;
}