ln(3x)>0
     ln3x>0
    ln(x-1)>0
    （2a-3a/4)^2-a^2/16≥a^3
    501.56*(-h^2-0.4h+0.76)≤1050h^2+420h
    -32.3038+1.2695x+28.4986083*sqrt(35/34+0.000039273*(x-151.78)^2)<250
    x^2+x-1>0
    (-2k)²－4(k-2)(k-6)≥0
    2-x>1
    -12x^2-24x+52≥0
    x^-3x+1<0
    4x^2-5x>0
    9x∧2－12x＋9≥0
    xlnx＞0
    0≤x∧x-5x≤4
    x²-x-6＜0
    12x+11≤3
    abs(a-2)
    log(x,2/3)>1
    315.62k-4734.37<1000

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