计算 (x+1)(3x-2)-(3x+1)(x-1)

计算 x(x+3)-(x-1)(x-2） 如何计算 (x+1)(x+2)(x+3)(x+4) 计算：（x+1)(x-2)(x-3)(x-6) 计算(X-1)(X-2)(X-3)(X-4) 计算x/(x^2-1) + (x^-x+1)/(x^3-x^2+x-1)+(x^2+x+1)/(x^3+x^2+x+1) x(x²-1)+2x²（x+1)-3x（2x-5)计算 计算,X(3x-2)(x+1)-2x(x-2)(x+2) 计算x^2-5x+6/x^2-1/x^2+x/x-3 计算：(x-1)(x^2-4X+3)-x(x^2-5X+2)有过程 计算1/x(x+1)+1/(x+1)(x+2)+1/(x+2)(x+3).+1/(x+2003)(x+2004) 计算1/x(x+1)+1/(x+1)(x+2)+1/(x+2)(x+3)+...+1/(x+2010)(x+2011) 计算（x*x+4x+5）/（x+2）-（x*x+6x+10）/（x+3）+1