private void HandleOperatorButton(OperatorButton operatorButton)
{
if (isAnimation || operatorButton.isSelected || !formula.CanAppendOperator(operatorButton.Operator))
{
SoundWareHouse.Instance.seButtonError.GetComponent <AudioSource>().Play();
return;
}
SoundWareHouse.Instance.seTermButton.GetComponent <AudioSource>().Play();
formula.AppendOperator(operatorButton.Operator);
formulaText.AppendOperator(operatorButton.Operator);
HandleTermButton(operatorButton);
}