\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 r105012 = a;
double r105013 = b;
double r105014 = r105012 + r105013;
double r105015 = c;
double r105016 = r105014 + r105015;
double r105017 = 2.0;
double r105018 = r105016 / r105017;
double r105019 = r105018 - r105012;
double r105020 = r105018 * r105019;
double r105021 = r105018 - r105013;
double r105022 = r105020 * r105021;
double r105023 = r105018 - r105015;
double r105024 = r105022 * r105023;
double r105025 = sqrt(r105024);
return r105025;
}