[tex]a) \: \frac{ {7}^{2} }{7} = \frac{49}{7} = 7[/tex]
[tex]b) \: \frac{ { ( - 2)}^{3} }{2} = \frac{ - 8}{2} = - 4[/tex]
[tex]c) \: \frac{6}{{( - 6)}^{2} } = \frac{6}{36} = \frac{1}{6} [/tex]
[tex]d) \: \frac{ - {3}^{5} }{81} = \frac{ - 243}{81} = - 3[/tex]