Mathematics
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    ln(2x+1)>x
    5a+11(100-a)=<0.4*[10a+12(100-a)]
    x3-4x2+5x-2>0
    (x-1)(x+2)<0
    3(x-1)(x-2)<=2x+2+6x-6
    6/(11-x)(10-x)<1
    6/(11-x)(10-x)>0
    ex>1
    (2*260980+2-260980/x/2)*(260980/x-1)<2147483648
    3-[(1+n)/2∧(n-1)-1/2∧(n-2)]<168
    2^x>=51
    (2*359718+2-359718/x/2)*(359718/x-1)<2147483648
    2.4+0.4x<4.5
    359719-2*x+2+((359718-3*x+2)^2)*0.5-(x^2)*0.5<2147483648
    359719-2*x+2+((359718-3*x+2)^2)*0.5-(x^2)*0.5<21474836480
    129398478400+8x^2-20*1079160x<21474836480
    129398478400+8x^2-3*1079160x<21474836480
    129398478400+8x^2-2*1079160x<21474836480
    129398478400+8x^2-1079160x<21474836480
    129398478400+8x^2-1079160x<2147483648

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