Mathematics
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    -2x+860≤400
    3m^2+m-4<0
    3m^2-m>0
    25+4k^2+20k>=0
    25+4k^2+20k>0
    x^2+2x-8<0
    x^2+2x-15>0
    x^2+8x-20>0
    lnx<2/1
    36/x<10
    36/x<3.6
    x^2+x-12<0
    e^x-1>tanx
    tanx>ex-1
    -2x+x-6<0
    1/x+lnx>1
    8-t>√9+t^2
    8-t>9+4t^2
    8-t>2t
    2x-3<5 3x+2>=-1

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