Those are math rules. See for example: https://math.stackexchange.com/questions/1382664/what-is-the-accepted-syntax-for-a-negative-number-with-an-exponent

]]>That may be true in pascal notation, but not in mathematical notation. You are using implied pascal – which is wrong -, I use mathematics.

]]>No, first exponentiation, then the sign. If the sign belongs to the base it has parantheses.

-2^4 = -16 but (-2)^4 = 16

]]>negation after, power first. Power renders always a positive value. ]]>