Explicação passo-a-passo:
[tex]a)7 \times 7 \times 7 \times 7 \times 7 \times 7 \times 7 = 7 \times 7 = 49[/tex]
[tex]b)8 \times 8 \times 8 \times 8 \times 8 = 5 \times 8 = 40[/tex]
[tex]c)5 \times 5 \times 5 \times 5 \times 5 \times 5 \times 5 = 7 \times 5 = 35[/tex]