using System;

public class Program

{

    public static void Main()

    {

        int n;

        Console.WriteLine("insert a number");

        n = int.Parse(Console.ReadLine());

        Console.WriteLine("n*3 = {0}", n*3);

        Console.WriteLine("n-5 = {0}", n-5);

        Console.WriteLine("n+7 = {0}", n+7);

    }

}