(3a^2/x+2y)^3乘(x^2-4xy+4y^2)除以(2y-x/x+2y)^2

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(3a^2/x+2y)^3乘(x^2-4xy+4y^2)除以(2y-x/x+2y)^2

(3a^2/x+2y)^3乘(x^2-4xy+4y^2)除以(2y-x/x+2y)^2
(3a^2/x+2y)^3乘(x^2-4xy+4y^2)除以(2y-x/x+2y)^2

(3a^2/x+2y)^3乘(x^2-4xy+4y^2)除以(2y-x/x+2y)^2
(3a^2/x+2y)^3乘(x^2-4xy+4y^2)除以(2y-x/x+2y)^2
=27a^6/(x+2y)^3 * (x-2y)^2÷(2y-x)^2/(x+2y)^2
=27a^6/(x+2y)

(3a^2/(x+2y)^3乘(x^2-4xy+4y^2)除以((2y-x)/(x+2y))^2
=(3a^2/(x+2y)^3乘(x-2y)^2除以((2y-x)/(x+2y))²
=[(3a^2)²(x-2y)²(x+2y)²]除以[(x+2y)^3(2y-x)]
=-9a^4(x-2y)除以(x+2y)