using System;


public class Sum
{
    private static void Main()
    {
        // Задание 1
        //int n,m,x;
        //Console.WriteLine("N: ");
        //      n = int.Parse(Console.ReadLine());
        //      Console.WriteLine("M: ");
        //      m = int.Parse(Console.ReadLine());
        //Console.WriteLine("M: ");
        //      x = int.Parse(Console.ReadLine());
        //      Console.ReadKey(true);

        //Console.WriteLine("(n++/--m)= " + (n++/--m));
        //Console.WriteLine("(++m<n--)= " + (++m<n--));
        //Console.WriteLine("(–-m>++n) " + (–-m>++n));
        //Console.WriteLine("(result) = " + (Math.Sqrt(x + Math.Pow((double)Math.Abs(x),(double)4))) + Math.Abs(x));

        // Задание 2
        //int x,y;

        //Console.WriteLine("X: ");
        //      x = int.Parse(Console.ReadLine());
        //      Console.WriteLine("Y: ");
        //      y = int.Parse(Console.ReadLine());
        //Console.ReadKey(true);

        //int a = (0 - x) * (-1 - 0) - (-1 - 0) * (0 - y);
        //int b = (0 - x) * (0- 0) - (0 - 0) * (0 - y);
        //int c = (-1 - x) * (0 - 0) - (0 - -1) * (-1 - y);

        //if (((x - 0) * 2 + Math.Pow((y - 0), 2) <= 1) || (a >= 0 && b >= 0 && c >= 0) || (a <= 0 && b <= 0 && c <= 0))
        //{
        //  Console.WriteLine("point is included");
        //}
        //else
        //{
        //  Console.WriteLine("point is not included");
        //}


        // Задание 3
        //int a = 10;
        //float b = (float) 0.01;

        //Console.WriteLine((Math.Pow((a+b),2) - (Math.Pow(a,4) + 6*Math.Pow(a,2)*Math.Pow(b,2) + Math.Pow(b,4)) / Math.Pow(b,4) + 4 * Math.Pow(a,3) * b));

    }
}