1<16+x<2
    x²+4x<0
    11-2^（x+1）>0
    （2x-1）^2-9≤7
    -x＾2-4x+3≤-2
    0.3b>0.5
    6x²－5x＋1＜0
    0.5
    0.5
    sqrt(3)×x<2sqrt(x^2-x+1)
    x-√（5-x）＜7.86667
    x-√5-x＜7.86667
    2x^3-2x^2-10x+9>0
    （x-x^2+6）*（x^2+5x+7）≤0
    x^2-5x+6＜0
    45x-1/6+(40000000x-x^2/6)/(x-(54000x-200)/(200000-x/1200))>0
    45x-1/6+(40000000-x/6)/(x-(54000x-200)/(2000x-x/1200))>0
    45x-1/6+(40000000-x/6)/(x-(54000x-200)/(2000000000x-x/1200))>0
    45x-1/6+(40000000-x/6)/(x-(54000x-200)/(20000000x-x/1200))>0
    45x-89>0

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