=-5pq+5p^2-3pq+3p^2-6pq^2+5pq^2
=-8pq+8p^2-6pq^2+5p^2q
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=-5pq+5p^2-3pq+3p^2-6pq^2+5pq^2
=-8pq+8p^2-6pq^2+5p^2q