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Calcule as potências:

a) (+ 7)²

b) (+ 5)³

c) (+ 2)³

d) (+ 3)³

e) (– 2)³

f) (– 5)³

g) (– 1)³

h) (– 2)⁴

i) (– 3)³

j) (– 3)⁴​