private void E_Click(object sender, EventArgs e)
{
//clears everything
textBox1.Clear();
leftTest.Clear();
RightTest.Clear();
operatorTest.Clear();
}
private void CE_Click(object sender, EventArgs e)
{
//should only clear the number you are currently entering
//needs fixing
textBox1.Clear();
leftTest.Clear();
RightTest.Clear();
operatorTest.Clear();
}