(x-1)(x-2)(x-3)(x-4)>120怎么做?

|x+3|-|2x-1|+|x-2|>1怎么做 x*x^3+(-2x^2)^2+14x^6/(-4x^2)怎么做? 合并同类项!(2x²+x)-[4x²-(3x²-x)]怎么做 2x^4-x^2-x-5除以x^2+1用多项式除法怎么做,结果是2x^2-x-2-3/(x^2+1) [3-2x/1-x]-1=[x+2/x-3]怎么做 (2x+1)(3x+2)^2(x^2+5x-24)>0怎么做 （2x²-3x+1）²-22x+33x-1怎么做? (5x+2)(x-2) -5(x+1)(x-3)怎么做 (6x+7)(6x+7)(3x+4)(x+1)=6 怎么做啊 (x-3)(x+5)-(x+1)²这道题怎么做? lim(sin(x^2*cos(1/x)))/x怎么做? x+2/x+1-x+3/x+2-x+4/x+3+x+5/x+4