Answer
$4ab(2a^2b^2-ab+1+4b)$
Work Step by Step
Factoring the $GCF=
4ab
$, then,
\begin{align*}
8a^3b^3-4a^2b^2+4ab+16ab^2
\Rightarrow
4ab(2a^2b^2-ab+1+4b)
.\end{align*}
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