xcosx＞0
    287989*1.137^x>12500000*1.03^(x-1)
    -4082750+3000000+W-W×10%/4-450000≥300000
    26700+x-x*10%/4≥50000
    32x+24(50-x)≤1392
    m^2-5m-32>0
    60x^2+60x-727>=0
    -1+3/2a<-2
     2 * a / 2 * a - 3 / 2 * a > 2
    2a/2a-3/2a<-2
    -（2a-3）/2a<-2
    -x^2-3x+4>0
    -1+2a/3<-2
    (3-2x)/2x <-2
    3-2x/2x<-2
    m*m-m-14.5>0
    (x+1)(x-2)<0
    e∧x-1＞0
    10+x/120<50+x/500
    x^2+10x-20＜0

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