化简:(2/x-1)-(1/x²-1)·(x²+2x+1/x-1)
化简(x+1/x)²+2(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)
根号x²-2x+1(x
(x+1-1/1-x)÷(x-x²/x-1) (x-4/x-x-6+ x+2/x-3)÷x+1/x-3
化简:x(x^2+x)/x^2(x^2-1)
计算:(1+1/x)·x²-2x+1/x²-1;(x²/x-1-2x/1-x)÷x/x-1
先化简再求值:2x²-4x/x+2·x²+2x/x²-4x+4+4x/2-x,其中x=1/
不等式x²-2x-2/x²+x+1
6x+(2x²-3x)-(x²-1)
(2x²-2x+3)(-x³+x-1)
(4x³)²×[x³-x(2x-1)]
(x-x²-1/1-x)·x²-2x+1/x²-x+1