神马作文网[x+(1/x)]^2-{[x+(1/x)-1/[1-(1/x)-x]}^2除以【x^2+（1/x^2)-x-(1/x)
![[x+(1/x)]^2-{[x+(1/x)-1/[1-(1/x)-x]}^2除以【x^2+（1/x^2)-x-(1/x)](/uploads/image/z/15381700-52-0.jpg?t=%5Bx%2B%281%2Fx%29%5D%5E2-%7B%5Bx%2B%281%2Fx%29-1%2F%5B1-%281%2Fx%29-x%5D%7D%5E2%E9%99%A4%E4%BB%A5%E3%80%90x%5E2%2B%EF%BC%881%2Fx%5E2%29-x-%281%2Fx%29)
x-1)(X-2)(x-3)...(x-50)+x(x-2)(X-3)...(X-50)+...+x(x-1)(x-2)
{2X+1}+{X}
x^2-|x|+1
｜x-1｜+｜x-2｜
(x-(x+1分之2x))除以x^2-1分之x^2-2x+1
x^2+1/x^2-1减去x-2/x-1除以x-2/x
求值：(x/x^2-1)除以(x^2+4x+3)/(x^2+2x+1)
x^5+x^4 = (x^3-x)(x^2+x+1)+x^2+x
x+2/x+1-x+3/x+2-x+4/x+3+x+5/x+4
化简式子:(x/x-1 - x/x方-1) 除以 x方-x/x方-2x+1,
化简{x²-2x分之x+2-x²-4x+4x分之x-1}除以X分之(x-1)(X-4)乘以（2-x）
化简：x(x^2+x)/x^2(x^2-1)