三个分式通分题

1）：2xy/(x+y)²
（2）;-4与2m-3/4m²2m+3
请大家快点;
（3）：x-y/2x+2y与xy/(x+y)²-y²与x/x²：2mn/

（1）2xy(x-y)/[(x+y)²(x-y)]与x(x+y)/[(x+y)²(x-y)]
(2) (x²-y²)/2(x+y)²与2xy/2(x+y)²
(3)2mn(2m+3)/[4(m²-1)(2m+3)]与(2m-3)(4m²-4)/[4(m²-1)(2m+3)]

[(x+y)²-y²(x-y)] (x۶xy(x-y)/)/2(x+y)²(x-y)]与x(x+y)/[(x+y)² 再看看别人怎么说的。