Answer
$-5\log_{c} M$
Work Step by Step
Using $\log_b x^a=a\log_b x$ (or the logarithm of a power), the given logarithmic equation, $
\log_{c} M^{-5}
,$ is equivalent to
\begin{array}{l}\require{cancel}
-5\log_{c} M
.\end{array}
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