1) х^2-x+2(x-1)^2=3x-2
2) (5-y)^2+17=(y-3)^2
3) 7x+x(x-7)=(2x+5)(5-2x)
4) 2y(3y-4)+24y=(7y-3)(2+y)
5) 31-3x-x^2-20x+7(x-2)^2
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