计算x^3-1/x^2+x+1 + x^3+1/x^2-x+1 + 2x^2/1-x
x-1)(X-2)(x-3)...(x-50)+x(x-2)(X-3)...(X-50)+...+x(x-1)(x-2)
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+2/x+1-x+3/x+2-x+4/x+3+x+5/x+4
x^5+x^4 = (x^3-x)(x^2+x+1)+x^2+x
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(3x-2)(x+1)-2x(x-2)(x+2)
x(x²-1)+2x²(x+1)-3x(2x-5)计算