(-2x^4)^4 y^3+2x^10(-2x^2 y)^3+2x^4*5(x^4)^3(3y)^3
x/x-y*y^2/x+y-x^3y2/x^4-y^4/x^2/x^2+y^2
(x+3y-4)(2x-y)
(x+2)(x+3) (x-4)(x+1) (y+4)(y-2) (y-5)(y-3)
3(x+y)-4(x-y)=11,2(x-y)+5(x+y)=27
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)
x^8-x^7y+x^6y^2-x^5y^3+x^4y^4-x^3y^5+x^2y^-xy^7+y^8
3(x-y)-2(x+y)-5(x-y)+4(x+y)+3(x-y) 化简合并同类项
(2x+y)(2x-3y)+x(2y+y) 2a(x-y)-4b(x-y)
(4x-2y-z)-{5x[8y-2y-(x+y)]-x+(3y-10z)]=? kuai
(2x-y)(2x+y)-2(3x-4y)(4y+3x)
已知|2-x|与|x-y+4|互为相反数,求代数式3(x-y)-5(x-y)-3(x-y)+(y-x)-4(x+y)+3
(x-3y)(y+2x)-(4y-3x)(3x+4y)计算