x+3y/x^2-y^2-x+2y/x^2-y^2-2x-2y/y^2-x^2
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x+3y/x^2-y^2-x+2y/x^2-y^2-2x-2y/y^2-x^2x+3y/x^2-y^2-x+2y/x^2-y^2-2x-2y/y^2-x^2x+3y/x^2-y^2-x+2y/x^2-
x+3y/x^2-y^2-x+2y/x^2-y^2-2x-2y/y^2-x^2
x+3y/x^2-y^2-x+2y/x^2-y^2-2x-2y/y^2-x^2
x+3y/x^2-y^2-x+2y/x^2-y^2-2x-2y/y^2-x^2
(x+3y)/(x^2-y^2)-(x+2y)/(x^2-y^2)-(2x-2y)/(y^2-x^2)
=[(x+3y)-(x+2y)+(2x-2y)]/(x^2-y^2)
=(2x-y)/(x^2-y^2)
5y/x^2-2y^2-2x-x^2-2/y
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[2/3x-2/x+y(x+y/3x-x-y)]/x-y/x
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