(x+y)(x-y)+(x-y)^2-(6x^2-2xy^2)÷(2y)

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(x+y)(x-y)+(x-y)^2-(6x^2-2xy^2)÷(2y)(x+y)(x-y)+(x-y)^2-(6x^2-2xy^2)÷(2y)(x+y)(x-y)+(x-y)^2-(6x^2-2xy

(x+y)(x-y)+(x-y)^2-(6x^2-2xy^2)÷(2y)
(x+y)(x-y)+(x-y)^2-(6x^2-2xy^2)÷(2y)

(x+y)(x-y)+(x-y)^2-(6x^2-2xy^2)÷(2y)
x^2-y^2+x^2-2xy+y^2-3x^2/y+xy=2x^2-xy-3x^2/y=(2x^2y-xy^2-3x^2)/y