Answer
$7b^5$
Work Step by Step
By combining like terms, the given expression, $
9b^5+3b^2-2b^5-3b^2
$, simplifies to
\begin{array}{l}
(9b^5-2b^5)+(3b^2-3b^2)
\\\\=
7b^5+0
\\\\=
7b^5
.\end{array}
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