计算：x^2(-2xy)^2-4x^3(xy^2-2)

计算：3xy[2xy-x（y-2）+x] 计算3xy[2xy-x(y-2)+x-1] 计算：5xy^2-[3xy^2-(4xy^2-2x^2y)]+2x^2y-xy^2 计算：3xy(x²y-xy²+xy)-xy²(2x-xy+2x） （x^2+xy/x-y)/（xy/x-y)计算 计算xy^2(-xy)^2-3/2xy^3*4/3x^2y 计算：1-2x+x^2/x-x^3*xy+x^2y/x-x^2 计算：x^2(-2xy)^2-4x^3(xy^2-2) (-2x²y)³·3xy÷2xy²·4x计算 计算(-xy)(x+2x²y) 计算-（x²y+3xy-4）+3（x²y-xy+2） 12xy+(3x平方-5xy)-2(3xy+2x平方)计算 计算5x^3y*(-3y)^2+(-6xy)^2*(-xy)-xy^3(-4x)^2 计算:-2xy^2÷(-4y/3x)^2 计算 (-4/3xy)(-3x^2y)^2=( ) 计算4x^2y^3/(-二分之一xy)^2 计算：（-3xy)^3*(-4/3x^2y) 计算：[(x-y)^2-(x+y)^2]/(-4xy)=