-6.5 X(-2)÷(-1/3)÷(-5)

[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^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 x(2-1/x)+x/(x^2-2x)÷(3-x)/(x^2-4)2.2/3+x/(3x-1)=1/9x-3 (1-x/3-x)^2÷(x^2-6x+9/9-x^2)*1/x^2-2x+1 x^2-1/x^2+4x+4÷（x+1）×x^2+3x+2/x-1计算 (x^-3x+2/x^-5x+6)^2÷(x-1/x^2-2x-3)^2 (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? (x²-4分之x²+x+1)²÷(x三次方-3x²+2x÷x三次方)²×(x÷x+2)² , 化简：〔（x^2+18x+72)÷（x+12)-(x^2+5x-6)÷(x-1)〕·(x^3-2x^2-x+1) 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} （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) 16-x^2/x^2-2x-3÷1^2-5x+4/x-3 化简（3/x-1-x-1)÷x-2/x的平方-2x+1 计算：(1)/(x-3)÷(x+2)/(x^2-9)-(1)/(x^2+5x+6) 计算[x(x²-2x+3)-3x]÷2分之1x²