Expand:
$3p^5q^3\left( 2pq + \frac{5}{(pq)^2} \right)$
\(3p^5q^3\left( 2pq + \frac{5}{(pq)^2} \right)\)
\(=3p^5q^3\cdot \frac{2(pq)^3+5}{(pq)^2}\\ =3p^5q^3\cdot \frac{2(pq)^3+5}{p^2q^2}\\ =3p^3q\cdot(2p^3q^3+5)\\ \color{blue}=6p^6q^4+5p^3q\)
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Thank you!