a)
[tex]5 {}^{4} = 5 \times 5 \times 5 \times 5 = 625[/tex]
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b)
[tex]3 {}^{7} = 3 \times 3 \times 3 \times 3 \times 3 \times 3 \times 3 = 2 \: 187[/tex]
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c)
[tex]8 {}^{2} = 8 \times 8 = 64[/tex]
