$$4 p ^ { 2 } + 3 p q + 5 q ^ { 2 } , 7 p ^ { 2 } - 6 p q - 3 p ^ { 2 } + 9 p q - 3 q ^ { 2 }$$
$-16p^{4}-6pq^{3}+15q^{4}-24qp^{3}-17\left(pq\right)^{2}$
$$-16p^{4}-17p^{2}q^{2}-6pq^{3}+15q^{4}-24qp^{3}$$
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$4p^{2}+3pq+5q^{2},4p^{2}+3pq-3q^{2}$
