计算3x/8y×16y²/27x² (2xy-x²)÷x-2y/xy 2x-6/x
计算3x/8y×16y²/27x² (2xy-x²)÷x-2y/xy 2x-6/x
计算(1)3x/8y×16y²/27x² (2)(2xy-x²)÷x-2y/xy 2x-6
x-y/x²÷x²-2xy+y²/xy*(xy-x²)
计算;(xy-x²)÷x²-2xy+y²/xy · x-y/x²
计算3x[xy-2x(1/y-x/3]+3y(x²-y²)
计算:(xy-x²)×x-y/xy
(x^2+xy/x-y)/(xy/x-y)计算
计算:(-7x²y)(2x²y-3xy³+xy)
计算 2xy[4x²y²-3y(xy+x²y)-xy²]
计算:3xy[2xy-x(y-2)+x]
分式计算:(x²+2xy+y²)/(x²y+xy)*y/(x+y)
急![(3x+y)²-3(3x-y)(x+y)-(x-3y)(x+3y)]÷(2xy)