Resposta:
OLÁ
A)
[tex] \boxed{ \boxed{( + 2) ^{3} = 2 \times 2 \times 2 = \blue{8} \: }}[/tex]
B)
[tex] \boxed{ \boxed{( - 7) ^{4} = ( - 7) \times ( - 7) \times ( - 7) \times ( - 7) = \blue{1.372}}}[/tex]
C)
[tex] \boxed{ \boxed{( - 9) ^{3} = ( - 9) \times ( - 9) \times ( - 9) = \blue{ - 729}}}[/tex]
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espero ter ajudado
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