(4x^2y+x^3y^3)÷(-2x^2y)计算
计算:(3x-4y)-[-(2y+x)+(x-3y)]-6x
计算 1.(-2x)^3-3x乘(x-2x^2) 2.【(x+2y)^2-(x-2y)(x+2y)】÷4y
计算:(-x-2y) * (3x-y)
计算:(X+Y)^5÷(-X-Y)^3*(X-Y)^2
计算4xy+(x-2y)的平方+(x+3y)(3y-x)
计算(x+y)(x+y)^2(-x-y)^3
计算:(x-4y)(2x+3y)-(x+2y)(x-y).
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:(3x-y)2-(2x+y)2+5x(y-x)
[(2x+y)(x-3y)+y(x+3y)]÷(2x)计算,
计算:(x-y)^7÷(y-x)^6+(-x-y)^3÷(x+y)^2
计算【3(x-y)^2(x+y)^-2/4(x+y)^2(x-y)^-2】^-2