计算:(3x²-5xy-2y²)/(3x+y)
计算3x[xy-2x(1/y-x/3]+3y(x²-y²)
计算:x²y-(2xy²-5x²y)+3xy²-y³
计算 2xy[4x²y²-3y(xy+x²y)-xy²]
计算:(-7x²y)(2x²y-3xy³+xy)
计算:2x+2y分之3y + x²+xy分之2xy
计算:(xy-x²)×x-y/xy
计算:(5-xy/x^3-x^2y)/(1-5/xy)^2*(y-x)^3
(-x²+2xy-y的平方)-2(xy—3x²)+3(2y的平方-xy) 计算.
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)
(3x-y)^2+(2x+3y)(-2x-3y)+5xy 计算
计算3x/8y×16y²/27x² (2xy-x²)÷x-2y/xy 2x-6/x
计算3xy[2xy-x(y-2)+x-1]