There isn't.
(-4)^2 is positive 16.
however you may be confusing this with -(4)^2 which is negative 16
-1331.
1/36
Negative 5 to the second power would be -5 times -5 which would be 25.
negative eight plus two times four to the second power
4
1
1
-16
nine
1.5
-3^2 = 9 -(3^2) = -9
The answer is 1, whatever the value of a.