beserta caranya.. tolong dikumpulkan besok

itu jawabanya maaf kalau salah...........

1) 2³ - 2^-2
= 2³ - 1/2²
= 8 - 1/4
= 32/4 - 1/4
= 31/4
= 7¾
2) 3⁴ ÷ 3^-1
= 3^(4+1)
= 3^5
3) (3⁴)^2/4
= 3^(4×2/4)
= 3²
= 9
4) 125^-1
= 1/125
= 1/5³