Answer
$a^{8}b^{12}$
Work Step by Step
Using $\dfrac{a^x}{a^y}=a^{x-y}$, then the expression, $
\dfrac{a^{10}b^{12}}{a^2b^0}
$, simplifies to
\begin{array}{l}\require{cancel}
a^{10-2}b^{12-0}
\\\\=
a^{8}b^{12}
.\end{array}
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