计算(4x^2-y^2)/(2x+y)=

分式计算(x-y-4y^2/x-y)(x+y-4x^2/x+y)=? 计算(4x^2-y^2)/(2x+y)= 计算：(2x+ )( -y)=4x^2-y^2 计算：[(x-y)^2-(x+y)^2]/(-4xy)= 计算:2xy/(x+y)².(x+y)/4y 计算：y(x-y)^2+(y-x)^3=? 计算:y-x分之x+y+x-y分之y-y-x分之2x-y 计算2x/x-y 计算（2x-3y)(x+4y)-(3x+y)(x-2y)（2x-3y)(x+4y)-(3x+y)(x-2y) 计算:(x+2y)(2x-y) 计算:(x+3y)(2x-y) 计算:(2x-3y)(x+y) 计算:(-x-2y) * (3x-y) 计算：(x+y)-3(x-2y). 计算:(x-2y)(x+y)-2y(1-4y)= (x-3y)(y+2x)-(4y-3x)(3x+4y)计算 计算:(x-y)^2*(x+y)^3*(-x-y)^3*(y-x)^4 计算：[（x+y）³-2(x+y)²-4(x+y)]÷（x+y)