x-2y分之4y^2+4y^2-x^2分之4x^2y+x+2y 分式的加减
问题描述：
x-2y分之4y^2+4y^2-x^2分之4x^2y+x+2y 分式的加减
答
4y²/(x-2y)+4x²y/(4y^2-x^2)+x+2y=4y²(x-2y)/(x²-4y²)-4x²y/(x²-4y²)+x+2y=(4xy²-8y³-4x²y)/(x²-4y²)+x+2y=(-8y³+x³-4xy²+2x...