$$\left. \begin{array} { l } { ( i i ) 5 p ^ { 2 } q ^ { 2 } + 4 p q + 7 , 3 + 9 p q - 2 p ^ { 2 } q ^ { 2 } } \\ { l m } \end{array} \right.$$
$4pq-5\left(pq\right)^{2}+7,\ 9pq-2\left(pq\right)^{2}+3,\ lm$
