X÷(1×2)+X÷(2×3)+…+X÷(2007×2008)=2007x=多少?

[x^2+2x-8/x^3+2x^2+x]÷[(x-2/x)×(x+4/x+1)]化简[x^2+2x-8/x^3+2x^2+x]÷[(x-2/x)×(x+4/x+1)]化简 (x+1-1/1-x)÷(x-x²/x-1) (x-4/x-x-6+ x+2/x-3)÷x+1/x-3 （x^24 x^23 x^22 …… x）÷（x^8+1）×（x^3+x^2-x-1)÷（x-1)÷(x^4+1)求值（x^24+x^23+x^22+……+x+1)÷（x^8+1)×(x^3+x^2-x-1)÷(x-1)÷(x^4+1) X^2-3X-2=0,求( x - 2x-1/x )÷(x-1)/(x^2-2x) x^2-x/x+1÷x/x+1 ；x^2+6x+9/x^2-9÷x+2/x-3；2/a÷4/a 化简(x^2-2x+1)/(x^2+1)÷(x-1)/(x^2+x)-x 【{x²-4x+4/x²-4}-x/x+2】÷x-1/x+2 化简3x-2/(x+y)[(x+y)/3x-x-y]÷(x-y)/x x(2-1/x)+x/(x^2-2x)÷(3-x)/(x^2-4)2.2/3+x/(3x-1)=1/9x-3 (x^2-x-6)÷(x-3) 化简 [3x/(x+2)-x/(x=2)]÷x/(x^2-4)化简 [3x/(x+2)-x/(x-2)]÷x/(x^2-4 3x/(x-2)-x/(x+2)÷2x/(x-4)化简3x/（x-2）-x/(x+2)÷2x/(x²-4)化简 (1-x/3-x)^2÷(x^2-6x+9/9-x^2)*1/x^2-2x+1 (x^-3x+2/x^-5x+6)^2÷(x-1/x^2-2x-3)^2 x^2-1/x^2+4x+4÷（x+1）×x^2+3x+2/x-1计算 (x+1/x+3)²÷x²-1/x²-9·(x-2)(x+1)/x-3计算 x=根号3时,代数式（x/x-1-x/x+1)÷2x/1-x的值是? 1.(x^3-x^2-4x+1)/(x^2-3x+2)-(x^3-2x^2-9x+21)/（x^2-5x+6）+（x^2-3x+8）/（x^2-4x+3）2.{(x^2)/（x-y)}*{y/(x+y)}-{(x^4y)/(x^4-y^4)}÷{（x^2/x^2+y^2）^2}