计算：(4x^2-y^2)÷4x^2-4xy y^2/2x-y

计算：[（x+y）³-2(x+y)²-4(x+y)]÷（x+y) 计算[(x+y)的立方-2(x+y)的平方-4(x+y)]÷(-x-y) 计算:2xy/(x+y)².(x+y)/4y [(x+2y)(x-2y)+4(x-y)^2-6x]/(6x)计算 (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（2x-3y)(x+4y)-(3x+y)(x-2y)（2x-3y)(x+4y)-(3x+y)(x-2y) 计算 ( x-2y )^4 ÷ ( 2y-x )^ 2 ÷ ( x-2y ) 计算:16(2x+y)^3÷(-4x-2y)^2·(2x-y) （4x^2y+x^3y^3）÷（-2x^2y）计算 计算[(x+y)平方-(x-y)平分-4x平分y平分]÷(2xy) 计算x²-x/x²×x/1-x和x²-4y²/x²+2xy+y²÷x+2y/x²+xy 计算4（x+y）^5（x-y）^4÷[2（x+y）³*（y-x）²] 如何计算4x*4y-2x*2y (x-2y+4)(x-2y-4) 计算 计算(4x^2-y^2)/(2x+y)= 计算：(2x+ )( -y)=4x^2-y^2 计算(3x+y-2)(4x-y+2)