// when the bracket's external coefficient is dropped on it
public void OnDrop(PointerEventData eventData)
{
if (eventData.pointerDrag.name == "Coefficient")
{
if (!droppedOn)
{
droppedOn = true;
bracket.TermDroppedOn();
bracket.Invoke("CheckExpanded", 1f);
}
else
{
bracket.TermDroppedOn(false);
}
}
}