x \cdot \sqrt{y \cdot y - z \cdot z}double f(double x, double y, double z) {
double r668718 = x;
double r668719 = y;
double r668720 = r668719 * r668719;
double r668721 = z;
double r668722 = r668721 * r668721;
double r668723 = r668720 - r668722;
double r668724 = sqrt(r668723);
double r668725 = r668718 * r668724;
return r668725;
}