X²-2XY+Y²分之X²÷(X+Y)²分之X²+2XY+Y²+(X-Y分之2X+2Y的值-2) 化简,求

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X²-2XY+Y²分之X²÷(X+Y)²分之X²+2XY+Y²+(X-Y分之2X+2Y的值-2) 化简,求

LZ的式子是
(x²/((x²+2xy+y²)/(x+y)²))/(x²-2xy+y²)+(2x+2y)/(x-y)-2