static void Main(string[] args)
{
Params p;
p = new Params();
int x = 0, y = 0;
p.math1(100, 50, ref x, ref y);
Console.WriteLine(x + " " + y);
int m, n;
p.math2(100, 25, out m, out n);
Console.WriteLine(m + " " + n);
p.AddNum(100);
p.AddNum(100, 100);
p.AddNum(100, z: 100);
p.AddNum(200, 200, 300);
Console.ReadLine();
}