This is pure braindeath for the 100th time still. We, mathematicians always come up with small abuse of notations to make life easier. No mathematician is like, this is the only way you could go you charlatan. That being said, write equations and formulas in a way that the people you wrote them for (even if yourself) will understand. That’s what matters. If the formula is ambigous for the intended reader, than it is a bad formula or the notations are not presented clearly enough.