计算x^n·x^n+1+x^n+1·x^n+2+(-x)^3·(-x)^2n-4急在线等速度

数学x^n*x^n+1+x^2n*x在线等. 计算(x^(2n)+x^n+1)(x^(3n)-x^(2n)+1) 计算：(m+2n)/(n-m)+n/(m-n)-2m(n-m)和[(x+2)/(x×x-2x)-(x-1)/(x×x-4 因式分解4x^(n+2)-9x^n+6x^(n-1)-x^(n-2) 计算：（x^3)^n÷x^2n÷x^n-1 计算x^3n/(x^2-1)-x^2n/(x^n+1)-1/(x^n-1)+1/(x^n+1) C语言 f(x)=1+x+x^2/2!+x^3/3!+...+x^n/n!直到|x^n/n| 计算(-x)^2n十1.(-x)^n+1 计算:1/(x-1)+1/(x-1)(x-2)+1/(x-2)(x-3)+.+1/(x-n)(x-n-1) x^2n（x^2-2n-2x^1-2n+x^-2n) （-x）³·x^2n-1+x^2n·（-x）² 8.已知（x^3n-2)²·(x^2n+4)÷x^n=x^2n-5,求n的值.