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using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Windows.Forms;

namespace CrystalMeth
{
    public partial class Form1 : Form
    {
        public Form1()
        {
            InitializeComponent();
        }

        private void button1_Click(object sender, EventArgs e)
        {
            int n = int.Parse(textBox1.Text);
            if (n<-5)
            {
                string res = ((3 * n) + 2).ToString();
                textBox2.Text = String.Format("F({0}) = (3*{0}) + 2, {0}<-5{2}{1}", n, res, Environment.NewLine);
            }
            else if (n>=-5 && n<=5)
            {
                textBox2.Text = String.Format("F({0}) = 0 , {0}c[-5,5]{2}{1}",n, 0, Environment.NewLine);
            }
            else
            {
                string res = ((3 * n) - 2).ToString();
                textBox2.Text = String.Format("F({0}) = (3*{0}) - 2, {0}>5{2}{1}", n, res,Environment.NewLine);
            }
        }
    }
}