ax>=100
    1500x²-9500x≥0
    ex<=xe
    1<=t<=1
    sqrt(-2^x)>-100000000
    -2
    ln(x+1)>=x>=ex-1
    [1/(0.5x+1)]*[1/(0.5x+1)]>1/x+1
    [1/(0.5x+1)]*[1/(0.5x+1)]<1/x+1
    -12500+X-(50 000+X)x1%≥5 000,
    200-x≤2x
    sinx＜x
    0<1-2a<1
    0<1-2a<1
    X-1/2≤10-5/2 x
    (3x-1)/2<=x+1
    a-3>2sqrt(2)
    2x+3<-1
    x-2(x-1)<3
    45(100-x)+38x<=4200

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