using System;

public class Program

{

    public static void Main()

    {

        double result; 

        const int x = 2; 

        result = Math.Cos(3 * x) + Math.Pow(x,3) / Math.Pow(Math.Sin(x), 3) - 3*x;

        Console.WriteLine("Ответ: " + result);

    }

}