Question

How do you evaluate `[(7-5)^5/8]-4`?

Answer 1

The answer is zero.

Explanation:

First, note that the parentheses mean that `7-5` should be computed first to get `7-5=2`. Then raise that to the fifth power to get `(7-5)^5=2^5=32` (powers come before divisions in order of operations). Then divide by 8 to get `((7-5)^2)/8=32/8=4`. Finally, subtract 4 to get `((7-5)^2)/8-4=4-4=0`.

The outer brackets `[ ]` are not technically needed in the notation.