计算:3/x+1-12/x^2-1-6/1-x
计算:(x+1)(x-2)(x-3)(x-6)
计算x^2-5x+6/x^2-1/x^2+x/x-3
计算(x*x+4x+5)/(x+2)-(x*x+6x+10)/(x+3)+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-4)
计算:(1/X^2+3X+2)+(1/X^2+5X+6)+(1/X^2+7X+12)=(1/X^2+9X+20)
计算:(x-1)/(x^2+3x+2)+6/(2+x-x^2)-(10-x)/(4-x^2)
计算1/x-3 - 6/x*x-9 - x-1/6-2x
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)
计算:﹙﹣x﹚^4·x^3-x^7-2x^3·(-x)^4 计算:(2x-1)^2-2(x-2)(x+6)
计算1/[x(x+3)]+1/[(x+3)(x+6)]+.+1/[(x+15)(x+18)]=?