若x＜-2,化简|1-|1+x|.怎么算?

若x＜-2,化简|1-|1+x|.怎么算? (x+2)(x+3)-(x+6)(x-1) 怎么算? (x-1)(x-2)(x-3)(x-4)-(x^2-5x)^2-10(x^2-5x)怎么算? 1/(1-x)+1/(1+x)+2/(1+x*x)+4/(1+x*x*x*x)+8/(1-x*x*x*x*x*x*x*x)怎么做 (x+1)(x-2)-(x-1)的平方怎么算? x(x-2)+m(1-x)=3怎么算 y+(1+x)(2+x)(3+x)导数怎么算, (X-3)/(X^2-4)*(X^2-4X+4)/(x^2-x-6)-1/(x+2)怎么算?(X-3)/(X^2-4)*(X^2-4X+4)/(x^2-x-6)-1/(x+2),怎么算? 若1＜x＜2,化简|x-2| /x-2-|x-1|/1-x+|x|/x的结果为 lim (x->1) (x^2-6x+8)/(x^2-5x+4) 怎么算? 1+x+x^2+x^3+.+x^99+x^100同上,怎么算?求解! X/2+X/1+X/4=14,求X,具体怎么变形怎么算呢 (x^10-x^5+1)/(x^2+x+1) 怎么算?(x^10-x^5+1)/(x^2+x+1)=（x^8-x^7+x^5-x^4+x^3-x+1) x*x+2*x+1=36,x怎么解, (x-1)(x+2)(x+3)(x+6)怎么做? 化简：（x+3) / x^2-3x － x-1 / x^2-6x+9）除以x-9 / 3X-x^2怎么化? (2x-1)(2x+1)+3(x+2)(x-2)=(7x-1)(x+1)怎么算? 1/x(x+1)+1/(x+1)(x+2)+1/(x+2)(x+3)化简怎么算?