\sqrt{\left(\left(\frac{\left(a + b\right) + c}{2} \cdot \left(\frac{\left(a + b\right) + c}{2} - a\right)\right) \cdot \left(\frac{\left(a + b\right) + c}{2} - b\right)\right) \cdot \left(\frac{\left(a + b\right) + c}{2} - c\right)}double f(double a, double b, double c) {
double r58703 = a;
double r58704 = b;
double r58705 = r58703 + r58704;
double r58706 = c;
double r58707 = r58705 + r58706;
double r58708 = 2.0;
double r58709 = r58707 / r58708;
double r58710 = r58709 - r58703;
double r58711 = r58709 * r58710;
double r58712 = r58709 - r58704;
double r58713 = r58711 * r58712;
double r58714 = r58709 - r58706;
double r58715 = r58713 * r58714;
double r58716 = sqrt(r58715);
return r58716;
}