x \cdot \sqrt{y \cdot y - z \cdot z}double f(double x, double y, double z) {
double r508135 = x;
double r508136 = y;
double r508137 = r508136 * r508136;
double r508138 = z;
double r508139 = r508138 * r508138;
double r508140 = r508137 - r508139;
double r508141 = sqrt(r508140);
double r508142 = r508135 * r508141;
return r508142;
}