2x/x²+1
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
不等式x²-2x-2/x²+x+1
6x+(2x²-3x)-(x²-1)
化简(x+1/x)²+2(x+1/x)+2
(2x²-2x+3)(-x³+x-1)
(4x³)²×[x³-x(2x-1)]
2x²+x+1
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)
计算:2x/(x-2)(x+1)÷(1-x/x+1)-x²+2x/x²-4?
x²+3x+9/(x²-27)+6x/(9x-x²)-(x-1)/(6+2x)
[(x+2)/(x²+2x)-(x-1)/(x²-4x+4)]÷(x-4)/x