（6x-6y）²-3(x-y)+(6y-6x)²+（7y-7x）合并同类项？
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（6x-6y）²-3(x-y)+(6y-6x)²+（7y-7x）
=36(x-y)²-3(x-y)+36(x-y)²-7(x-y)
=(x-y)(36(x-y)-3+36(x-y)-7)
=(x-y)(72(x-y)-10)
=(x-y)(72x-72y-10),1,原式=2（6x-6y）²+（7-3）（x-y）
=2（6（x-y））²+4（x-y)
=2x36（x-y)²+4（x-y）
=(72(x-y)+4)(x-y)
=(72x-72y+4)(x-y),2,20,2,原式=36x^2+36y^2-72xy-3x+3y+36y^2+36x^2-72xy+7y-7x=72x^2+72y^2-144xy-10x+10y,0,
=36(x-y)²-3(x-y)+36(x-y)²-7(x-y)
=(x-y)(36(x-y)-3+36(x-y)-7)
=(x-y)(72(x-y)-10)
=(x-y)(72x-72y-10),1,原式=2（6x-6y）²+（7-3）（x-y）
=2（6（x-y））²+4（x-y)
=2x36（x-y)²+4（x-y）
=(72(x-y)+4)(x-y)
=(72x-72y+4)(x-y),2,20,2,原式=36x^2+36y^2-72xy-3x+3y+36y^2+36x^2-72xy+7y-7x=72x^2+72y^2-144xy-10x+10y,0,
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