Mathematics
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    lg(10x-10)<1
    3X^2-26X-9=0X>=0,X=
    lg(10x-10)<0
    x/3>-33
    π>0
    log(3,(2x-1))>0
    x²-x-6>0
    33+X-(600+X)×67÷4≥60
    33+X-(600+X)×67÷4≥60
    33+X-(600+X)×67÷4≥60
    0<(1-√(1-4a))/2a<2
    0≤(1-√(1-4a))/2a≤2
    639+19x>0 1704+7x<0
    0≤(1-√1-4a)/2a≤2
    x²+4x-32>0
    80x+40(100-x)≥6000 80x+40(100-x)≤6120
    t^3-2t^2+3t≥0.875
    t^3-3t^2+3t≥0.875
    1<5-x<3
    1<5-x<3

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