using System;

                    //f(x)=x^3+3x^2-2x+5

public class Program

{

    public static void Main()

    {           

        Console.WriteLine("Hector L. Galvan Sandoval");

        Console.WriteLine("Type the value of X");

        double X = Convert.ToDouble(Console.ReadLine());

        double result = (X * 3) + (3 * Math.Pow(X, 2)) - (2 * X) + 5;

        Console.WriteLine("the result of the problem (f(x)=x^3+3x^2-2x+5) is {0}", result);

    }

}

​