x-2/x-1÷(x+1-3/x-1)
x(2-1/x)+x/(x^2-2x)÷(3-x)/(x^2-4)
x-1)(X-2)(x-3)...(x-50)+x(x-2)(X-3)...(X-50)+...+x(x-1)(x-2)
(x+1-1/1-x)÷(x-x²/x-1) (x-4/x-x-6+ x+2/x-3)÷x+1/x-3
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-2/x-1÷(x+1-3/x-1)
1+x+x^2+x^3+.+x^99+x^100
|X-1|+|X-2|+|X-3|+|X-4|+|X-5|+|X-6|+|X-7|+|X-8|+|X-9|+|X-10|
x(x+1)^3+x(x+1)^2+x(x+1)+x+1因式分解
x^2-x/x+1÷x/x+1 ;x^2+6x+9/x^2-9÷x+2/x-3;2/a÷4/a
解方程x/(x-2)=2x/(x-3)+(1-x)/(x-5x+6)
就这两道题,1、|x+1|+|x-2||x+1|+|x-2|+|x-1||x+2|+|x-2|+|x+3|+|x-1||