private void HandleEqualButton(EqualButton equalButton) { if (isAnimation || equalButton.isSelected || !formula.CanAppendEqual(equalButton.equal)) { SoundWareHouse.Instance.seButtonError.GetComponent <AudioSource>().Play(); return; } SoundWareHouse.Instance.seTermButton.GetComponent <AudioSource>().Play(); formula.AppendEqual(equalButton.equal); formulaText.AppendEqual(); HandleTermButton(equalButton); }