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

namespace WindowsFormsApp2
{
    public partial class Form1 : Form
    {
        public Form1()
        {
            InitializeComponent();
        }

        private void Form1_Load(object sender, EventArgs e)
        {   double a=-4.5;
            string stra = a.ToString("R");
            textBox1.Text = stra;
            double b = 0.75 * Math.Pow(10,-4);
            string strb = b.ToString("R");
            textBox2.Text = strb;
            double c = (0.845) * Math.Pow(10, 2);
            string strc = c.ToString("R");
            textBox3.Text = strc;

        }

        private void textBox1_TextChanged(object sender, EventArgs e)
        {

        }

        private void button1_Click(object sender, EventArgs e)
        {
            double x=double.Parse(textBox1.Text);
            textBox4.Text += Environment.NewLine + "x=" + x.ToString();
            double y = double.Parse(textBox2.Text);
            textBox4.Text += Environment.NewLine + "y=" + y.ToString();
            double z = double.Parse(textBox3.Text);
            textBox4.Text += Environment.NewLine + "z=" + z.ToString();
            double a = (Math.Pow(8 + Math.Pow(Math.Abs(x - y), 2) + 1, 1 / 3)) / (x * x + y * y + 2);
            double b = Math.Exp(Math.Abs(x - y)) * Math.Pow((Math.Pow(Math.Tan(z), 2)+1), x);
            double u = a - b;
            textBox4.Text += Environment.NewLine + "Результат U=" + u.ToString();
        }
    }
}