x/2-1＞x
    0.2x/0.3-(6-7x)/3≤1
    2^x<10^(-9)
    (3*x+1)/2+x/3>(1+2*x)/2+x/2
    6*x+2>2+4*x
    3*x+1>1+2*x
    2(3*x+1)>3(1+2*x)
    (3*x+1)/3>(1+2*x)/2
    0＜2x+5＜7
    -3x≤9 3x-2<4 2x-1999≤3
    -x/6≥1
    abs(x-1) ≥abs(x+3)
    x-1≥x+3
    586.350456-298.0028*n+33.86*n*n*n/6-1.2*9.94*n*n*n/6 >0
    (1/5)^(2*x+1)/(x*2+1)<1*10^-15
    (49.14x^2+1080.21x)/(147.42x+2160.42)*(24.57x^2+360.07x)+333.26-302.5x-1.2*(6.25x^2+217.07x)*(12.5x^2+651.21x)/(37.5x+1302.42)>0
    1160.57+88.178*n+（305.92*n+26.74*n^2）*(458.88*n+26.74*n^2)/(1835.52+160.44*n)-1.2*(69.03+4.87*n)*(208.59*n+9.74*n^2)/(29.22*n+417.18)≥0
    -6479.32-308.53*n+（399.37*n+18.82*n^2）*(1149.11*n+37.63*n^2)/(2396.19+112.89*n)-1.2*(97.74+4.87*n)*(312.97*n+9.74*n^2)/(29.22*n+586.44)≥0
    ln(x)>x^2-2x
    (49.14x^2+1080.21x)/(147.42x+2160.42)*x(24.57x^2+360.07x)+333.26-302.5x-1.2*(6.25x^2+217.07x)*(12.5x^2+651.21x)/(37.5x+1302.42)>0

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