2x2+3x-2, (x+2)(2x-1), 6x2-6-5x, (3x+2)(2x-3), 20y2+y-1, (4y+1)(5y-1), 27ab-9b2-20a2, -(3b-5a)(3b-4a), 15a2-8a-12, (3a+2)(5a-6)

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