using System;

public class Program

{

    public static void Main()

    {

        int m=7, k=5;

​

​

        double x=6.4, y=1.7;

​

        double a, b, c, d;

​

        a=Math.Pow(Math.Cos(x+y),2);

​

​

        b=Math.Pow(Math.Pow(x,2)+Math.Exp(x+y), 1.0/4);

​

​

        c=Math.Abs((Math.Pow(k,2)+m)/Math.Pow(m,2));

​

​

        d=(a+Math.Pow(b,2))/c;

​

        Console.WriteLine("a={0,5:F2}, b={1,5:F2}, c={2,5:F2}, d={3,5:F2}", a, b, c, d);

    }

}