public static void Main()
double myvar1 = 2/(Math.Sqrt(3)-1);
double myvar2 = 3/(Math.Sqrt(3)-2);
double myvar3 = 15/(3-Math.Sqrt(3));
double myvar4 = Math.Pow((Math.Sqrt(3)+5),-1);
double mysum = myvar1+myvar2+myvar3;
double myresult = mysum*myvar4;
Console.WriteLine("result: " + myresult);