(x+5)2 - x2 + 10x + 25, (2y -9)2 - 4y2 - 36y + 81, (x+2)3 - x3 +6x2 + 12x + 8, (y-3)3 - y3 - 9y2 + 27y - 27, (x+6) (x-6) - x2 - 36, (2a + 3) (2a -3) - 4a2 - 9, (x+5) (x+2) - x2 + 7x + 10, (y-4) (y+3) - y2 - y -12,

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