(2x^1/2+3x^-1/2)^4-(2x^1/2-3x^-1/2)^4,化简
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
|X-1|+|X-2|+|X-3|+|X-4|+|X-5|+|X-6|+|X-7|+|X-8|+|X-9|+|X-10|
x(2-1/x)+x/(x^2-2x)÷(3-x)/(x^2-4)
(x-1)^3(x+1)(x-2)/(x+4)
(x+1)(x+2)(x+3)(x+4)+1
化简:1x(x+1)+1(x+1)(x+2)+1(x+2)(x+3)+1(x+3)(x+4)
(x+2/x+1)-(x+4/x+3)-(x+3/x+2)+(x+5/x+4)
x^4+x^3+x^2+x+1=0,x^2006+x^2005+x^2004+x^2003+x^2002
化简:1/(x+1)(x+2)+1/(x+2)(x+3)+1/(x+3)(x+4)
化简3x^2(x-1)-3x(x^2+1)+4x(2X-5)
|x^2-3x-4|>x+1