Question

All of the following are equivalent except _____.can someone please help me

$(-2)^{4$
$-2^{4$
(-2)(-2)(-2)(-2)
$2^{4}$

Answer 1

All are the same dude if we further try to calculate then all will give the same answer 16

Answer 2

Hello, 
(-2)^4 = (-2)(-2)(-2)(-2) = +16
-(2^4) = -(16) = -16
(-2)(-2)(-2)(-2) = +16
2^4 = (2)(2)(2)(2) = +16
Therefore the second one is different from all four.