\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 r105222 = a;
double r105223 = b;
double r105224 = r105222 + r105223;
double r105225 = c;
double r105226 = r105224 + r105225;
double r105227 = 2.0;
double r105228 = r105226 / r105227;
double r105229 = r105228 - r105222;
double r105230 = r105228 * r105229;
double r105231 = r105228 - r105223;
double r105232 = r105230 * r105231;
double r105233 = r105228 - r105225;
double r105234 = r105232 * r105233;
double r105235 = sqrt(r105234);
return r105235;
}