计算(1)(3x²+2xy-1/2x)-(2x²-xy+x)
计算3xy[2xy-x(y-2)+x-1]
计算:3xy[2xy-x(y-2)+x]
计算;(xy-x²)÷x²-2xy+y²/xy · x-y/x²
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:(-7x²y)(2x²y-3xy³+xy)
计算3x[xy-2x(1/y-x/3]+3y(x²-y²)
计算(3x^3y-x^2y+1/2xy)÷(-1/2xy)
还有,计算1-(3xy-x)+【-2(2x+3xy)】
计算:(1)(7-3x)+(5x-6) (2)-(x^2-3)-(7-5x^2) (3)xy-(3x-2xy)+(3xy
通分计算:(1)2x-3/(x-1)(x-4) - x-2/(1-x)(4-x) (2)x平方-y平方/xy - xy-
1、xy²+2xy-x(因式分解)