3x+4y/x-y +3y/y-x -4x/x-y
(x-y)^3-(x-y)^4 因式分解
(x+3y-4)(2x-y)
x/x-y*y^2/x+y-x^3y2/x^4-y^4/x^2/x^2+y^2
(2x+y)(2x-3y)+x(2y+y) 2a(x-y)-4b(x-y)
x-4y分之3x + 4y-x分之x+y - x*x-4y分之7y
{(x,y) |x|+|y|
x>y?x:y
【多项式相乘】:(3x-y)(y+3x)-(4x-3y)(4x+3y)
(5x-3y)(3y+5x)-(4y-3x)(3x-4y)
(x-3y)(y+2x)-(4y-3x)(3x+4y)计算
(x+2)(x+3) (x-4)(x+1) (y+4)(y-2) (y-5)(y-3)
(2x-y)(2x+y)-2(3x-4y)(4y+3x)