(p+q)(p2-q2) +(p-q) (p2+q2)
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p(p2-q2)+q(p2-q2) + p(p2+q2) -q(p2+q2)
p3-pq2+qp2-q3+p3+pq2-qp2+q3
= 0
p3-pq2+qp2-q3+p3+pq2-qp2+q3
= 0
ayan437:
worth answer
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