化简:(3x+1)(2x-3)— 2(x-1)(4x+1)
(x-1)^3(x+1)(x-2)/(x+4)
(x+1)(x+2)(x+3)(x+4)+1
(x+2/x+1)-(x+4/x+3)-(x+3/x+2)+(x+5/x+4)
计算(x*x+4x+5)/(x+2)-(x*x+6x+10)/(x+3)+1
(1) x-3/x-2 - x-5/x-4=x-7/x-6 - x-9/x-8
化简 x(x-1)+2x(x+1)-3x(2x-5)
计算 x(x+3)-(x-1)(x-2)
化简{x²-2x分之x+2-x²-4x+4x分之x-1}除以X分之(x-1)(X-4)乘以(2-x)
1/(x+1)(x+2) + 1/(x+2)(x+3) + 1/(x+3)(x+4) + ...+ 1/(x+2005)
x^2-1/x^2+4x+4÷(x+1)×x^2+3x+2/x-1计算
x(x平方-1)+2X平方(X+1)-3X(2X-5)帮个忙
【(Xˇ2-X)/x】 ·【 x/(X+1)】+【(3x+1)】