\sin \left({\left(\sqrt{\tan^{-1}_* \frac{b}{b}}\right)}^{\left(b - a\right)}\right)double f(double a, double b) {
double r8080 = b;
double r8081 = atan2(r8080, r8080);
double r8082 = sqrt(r8081);
double r8083 = a;
double r8084 = r8080 - r8083;
double r8085 = pow(r8082, r8084);
double r8086 = sin(r8085);
return r8086;
}