(-4x+1)(2x+3)-(-8x)(x+2)
(1) x-3/x-2 - x-5/x-4=x-7/x-6 - x-9/x-8
(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
解方程:(x-8)/(x-3)-(x-9)/(x-4)=(x+7)/(x+8)-(x+2)/(x+3)
①(x+4x+8)+3x(x+4x+8)+2x②(2x-3x+1)-22x+33x-1③(6x-1)(2x-1)(3x-
先化简,再求值:[x+2/(x^2-2x)-(x-1)/(x^2-4x+4)]÷2x-8/(x^3-2x^2)
x(2x-5)>2x的平方-3x-4 (x+1)(x-3)+8x>(x+5)(x-5)-2 解不等式组
3X+(X+2)+(X+1)*(X-1)=4*(X²+8)
x^2-1/x^2+4x+4÷(x+1)×x^2+3x+2/x-1计算
1/(x+1)(x+2) + 1/(x+2)(x+3) + 1/(x+3)(x+4) + ...+ 1/(x+2005)