计算:(-3xy)^3*(-4/3x^2y)
计算3xy[2xy-x(y-2)+x-1]
计算:3xy[2xy-x(y-2)+x]
计算 2xy[4x²y²-3y(xy+x²y)-xy²]
计算:(-3xy)^3*(-4/3x^2y)
计算 (-4/3xy)(-3x^2y)^2=( )
计算4xy+(x-2y)的平方+(x+3y)(3y-x)
计算:(3x^2-2y^2)-(-x^2+2xy+y^2)-(x^2-4xy+3y^2)
计算:(5-xy/x^3-x^2y)/(1-5/xy)^2*(y-x)^3
计算(x^8-x^7y+x^5y^3-x^4y^4+x^3y^5-x^y^7+y^8)(x^2+xy+y^2)
计算(3x^3y-x^2y+1/2xy)÷(-1/2xy)
计算3y/(2x+2y)+2xy/x^2+xy
计算:2x+2y分之3y + x²+xy分之2xy