sqrt(9x^2+6x+1)<2
    sqrt(9x^2+6x+1)<2
    abs(6-5x)<2
    (x+5)(1-x)≥8
    (x+1)(x-1)>0
    (2x-1)/3＜x/2+1
    abs(1-3x)≤3
    (4x-8)^2-16x≤0
    sinx>0 cosx<1/2
    x²≤4
    （10^x）-（6^x）-（3^x）≥1
    10^x-6^x-3^x≥1
    3x(x-17)<9(1-3x)
    x/25+200/x≥2√8
    x≥1080x^(-118)-146x^0.15
    x≥1080x^118-146x^0.15
    ((X-1200)/2000+1)*((X-1599)/15*115+900+2800+1400)>=6500
    2x＾2-3x<0
    (x-1)/(x-3)>0
    x＾2-16>0

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