I'm not sure which way you mean the problem:
-(-1)³ · (2-4)² - (-100)(4) = -(-1) · (-2)² - (-400) = 1·4 + 400 = 4 + 400 = 404
-(-1)³ · (2-4)² - (-100)^4 = -(-1) · (-2)² - (100 000 000) = 1 · 4 - 100 000 000 = -99 999 996
Or, did you mean something else?