Mathematics
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    -7小于或等于x+5小于或等于7
    -5小于2x-3小于5
    x+3<2
    72x<5
    m-8>0
    abs(x-1)>2x^2
    200/ x+200<40
    2x^2+3x≥0
    3x-5<10
    37x-5<10
    2x-4>0
     -4082750+3000000+x-x*10%/4-450000 ≥300000
    (4x+1)(3x+1)(2x+1)(x+1)>0
    (4x-1)(3x-1)(2x-1)(x-1)>0
    225*1/a+a小于5000 a大于0
    225*1/a+a小于5000
    m^2-4m^2+12>0
    e^x+1/{(e^x)+1}>1
    e^x+1/(e^x)+1>1
    abs(5x+1)<2-x

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