(x+y)^2-(3x-2y)^2计算
计算:(-x-2y) * (3x-y)
计算(x+y)(x+y)^2(-x-y)^3
有这样一道题:"计算(2*x*x*x-3*x*x*y-2*x*y*y)-(x*x*x-2*x*y*y+y*y*y)+【-
(x+y)^2-(3x-2y)^2计算
计算:(3x-y)2-(2x+y)2+5x(y-x)
计算:(3x-4y)-[-(2y+x)+(x-3y)]-6x
计算【3(x-y)^2(x+y)^-2/4(x+y)^2(x-y)^-2】^-2
计算(2x-3y)(x+4y)-(3x+y)(x-2y)
[(2x+y)(x-3y)+y(x+3y)]÷(2x)计算,
(x-3y)(y+2x)-(4y-3x)(3x+4y)计算
计算:(y-x)^3(x-y)^m-(x-y)^m+2(y-x)
计算:(x-y)^7÷(y-x)^6+(-x-y)^3÷(x+y)^2