x2-2x+3 - (x+3)(x+1), x2+6x+8 - (x+2)(x+4), 4x2-9 - (2x+3)(2x-3), 2x2-x-6 - (2x+3)(x-2), x2-9 - (x+3)(x-3), 3x2-27x+60 - 3(x-4)(x-5), 5x2+18x+9 - (5x+3)(x+3), 2x2+11x+5 - (2x+1)(x+5), x2-4x-45 - (x-9)(x+5), x2-3x-54 - (x-9)(x+6),

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