(3p+q)2 - 9p2+6pq+q2, (2m+2n)2 - 4m2+8mn+4n2, (y+5)2 - y2+10y+25, (3x-2y)2 - 9x2-12xy+4y2, (2a-3b)2 - 4a2-12ab+9b2, (1+3x2)2 - 9x4+6x2+1, (m+3)2 - m2+6m+9, (9-a)2 - a2+18a+81, (5a3+3b)2 - 25a6+30a3b+9b2, (4ax-1)2 - 16a²×²-8ax+1,

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