(x-2y)^2*(x^2+2xy+4y^2)^2
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(x-2y)^2*(x^2+2xy+4y^2)^2(x-2y)^2*(x^2+2xy+4y^2)^2(x-2y)^2*(x^2+2xy+4y^2)^2(x-2y)^2*(x^2+2xy+4y^2)^2
(x-2y)^2*(x^2+2xy+4y^2)^2
(x-2y)^2*(x^2+2xy+4y^2)^2
(x-2y)^2*(x^2+2xy+4y^2)^2
(x-2y)^2*(x^2+2xy+4y^2)^2
=[(x-2y)*(x^2+2xy+4y^2)]^2
=(x^3-8y^3)^2
=x^6-16(xy)^3+64y^6
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(x+y)(x+y+2xy)+(xy+1)(xy-1)(x+y)(x-y)+4(y-1)
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(-x-y)(x^2+xy+y^2)
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2*(x-y)²(y-x)(xy)
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X-Y/2X+2Y XY/X+Y²
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化简2(x²y+xy)-3(x²y-xy)-4x²y