Mathematics
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    x(x+1)^2<2/e-2
    -a<3a
    3x^2-5x≥0
    134.84*e^(-1203/x)>9
    27000+1140(x+200/x)≤70000
    xx+21500x/57+200<=0
    xx+200<=21500x/57
    10a+25(15-a)≤220
    11a+25(15-a)<220
    -1050+I-(1000-180-600+I)×8%/4-66≥500
    -1050+I-(1000-180-600+I)×8%/4-66≥500
    lnx+1
    
1600*1.2x*(2.2/(2.8/1.4x))>1600*1.2x*(2.2/(2.8/1.4x ))x<5
    (x²-1)/(2x²+1)-1/2<1
    -1/m≥2
    x^2-25x+100≥0
    60/x+40/x-40≤4
    60/x+40/x-40≤4
    x^2-65x+600≥0
    m<2 m+2>2 m^2-4m-4>=(m+2)^2-4(m+2)-4

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