4x^3y^2(2x^2-3xy+5y^2)÷(-4x^2y^2)计算
计算4xy+(x-2y)的平方+(x+3y)(3y-x)
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(1)x/x+y-x/x-y (2)a+2+4/a+2 (3)x^2-y^2/xy÷(x+y)
计算:3xy[2xy-x(y-2)+x]
计算 2xy[4x²y²-3y(xy+x²y)-xy²]
计算(3x^3y-x^2y+1/2xy)÷(-1/2xy)
[-(x-y)^2/xy]^-4*(y^2-xy/x)^3*(x^4/y^10)÷(xy-y^2/x)^-5=-y(y-
计算:4xy-(x+y)^2/xy(x+y)(x-y)÷x^2+xy-2y^2/x^2y+2xy^2
已知(x+2)^2+|x+y+5|=0,求3x^2y-[2x^2y-(2xy-x^2y)-4x^2]-xy
4x^3y^2(2x^2-3xy+5y^2)÷(-4x^2y^2)计算
x^8-x^7y+x^6y^2-x^5y^3+x^4y^4-x^3y^5+x^2y^-xy^7+y^8
计算:{4x(2xy-3xy的平方)-3x平方y(4x-5y)}÷(-0.5xy)