3(x-y)²-7(x-y)+8(x-y)²+5(x-y)
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3(x-y)²-7(x-y)+8(x-y)²+5(x-y)
3(x-y)²-7(x-y)+8(x-y)²+5(x-y)
3(x-y)²-7(x-y)+8(x-y)²+5(x-y)
3(x-y)²-7(x-y)+8(x-y)²+5(x-y)
3(x-y)²-7(x-y)+8(x-y)²+5(x-y)
3(x-y)²-7(x-y)+8(x-y)²+5(x-y)