计算(2x-3y-1)(-2x-3y+5)
计算:(-x-2y) * (3x-y)
计算(x+y)(x+y)^2(-x-y)^3
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)
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)+【-
(2x+y)(x+3y-1)计算
计算:(3x-y)2-(2x+y)2+5x(y-x)
计算3x[xy-2x(1/y-x/3]+3y(x²-y²)
计算:1/(x-y)-1/(x+y)-2y/(x^2+y^2)-4y^3/(x^4+y^4)-8x^7/(x^8+y^8
利用乘除法运算公式计算5(x+y)(x-y)-2(x+y)^2+3(x-y)^2其中x=2,y=1
计算【3(x-y)^2(x+y)^-2/4(x+y)^2(x-y)^-2】^-2
1.计算(a^2+a+1)(a^2-a+1) 2.计算(x-y)(x+y)+(3x-2y)(2x+y)-x(6x-y)
计算(2x-3y)(x+4y)-(3x+y)(x-2y)