Задача по языку С#

Помогите найти ошибку.Нужно написать в С# В WindowsForms
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 WindowsFormsApp

public partial class Form1 : For

private object textBox
public Form1(

InitializeComponent()

private void textBox1_TextChanged(object sender, EventArgs e

textBox1.Text = "-15.246"

private void textBox2_TextChanged(object sender, EventArgs e

textBox2.Text = "4.642 * Math.Pow(10,-2)"

private void textBox3_TextChanged(object sender, EventArgs e

textBox3.Text = "20.001 * Math.Pow(10,2)"

private void Form1_Load(object sender, EventArgs e

textBox4.Text = "Конт.раб №1 Ст.гр.Тяпкова И.С.ИБ261001"

private void button1_Click(object sender, EventArgs e

double x = double.Parse(textBox1.Text)
textBox4.Text += Environment.NewLine
"X = " + x.ToString()
double y = NewMethod()
textBox4.Text += Environment.NewLine
"Y = " + y.ToString()
double z = double.Parse(textBox3.Text)
textBox4.Text += Environment.NewLine
"Z = " + z.ToString()
double с = Math.Log(Math.Pow(y, -Math.Sqrt(Math.Abs(x)) * Math.Log(x - y / 2)))
double b = Math.Sin(Math.Atan(z)) * Math.Sin(Math.Atan(z))
double a = с + b
textBox4.Text += Environment.NewLine
"Результат A = " + a.ToString()

private double NewMethod(

return double.Parse(textBox2.Text)


}