(x²+2x-3)(x²+2x-24)+90x²-2xy+y²-5x+5y-6
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(x²+2x-3)(x²+2x-24)+90x²-2xy+y²-5x+5y-6
(x²+2x-3)(x²+2x-24)+90
x²-2xy+y²-5x+5y-6
(x²+2x-3)(x²+2x-24)+90x²-2xy+y²-5x+5y-6
(x²+2x)²-27(x²+2x)+162=(x²+2x-9)(x²+2x-18)
(x-y)²-5(x-y)+6=(x-y-2)(x-y-3)=(y-x+2)(y-x+3)