\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 r70053 = a;
double r70054 = b;
double r70055 = r70053 + r70054;
double r70056 = c;
double r70057 = r70055 + r70056;
double r70058 = 2.0;
double r70059 = r70057 / r70058;
double r70060 = r70059 - r70053;
double r70061 = r70059 * r70060;
double r70062 = r70059 - r70054;
double r70063 = r70061 * r70062;
double r70064 = r70059 - r70056;
double r70065 = r70063 * r70064;
double r70066 = sqrt(r70065);
return r70066;
}