Answer
$14pq^{6}-p^{4}q^{4}-11p^{4}q$
Work Step by Step
Remove parentheses.
$=9pq^{6}-11p^{4}q+5pq^{6}-p^{4}q^{4}\qquad$ ...gather like terms.
$=9pq^{6}+5pq^{6}\quad-11p^{4}q\quad-p^{4}q^{4}$
$=14pq^{6}-11p^{4}q-p^{4}q^{4}$
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