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
    x^4+x^3-1>0
    5x-2>3(x+1)
    （47.14*x^2+1080.21x）/(147.42x+2160.42)*(24.57x^2+360.07x)-1853.39238-418.894x-1.2*(6.25x^2+217.07x)*(12.5x^2+651.21x)/(37.5x+1302.42)>0
    （47.14*x^2+1080.21x）/(147.42x+2160.42)*(24.57x^2+360.07x)-6224.88438-754.984x-1.2*(6.25x^2+217.07x)*(12.5x^2+651.21x)/(37.5x+1302.42)>0
    <100-2x><50-2x>=4704
    （x+1）÷2<（2x-1）÷5
    5x+1≤3（x+1）
    4x+6<3x+9
    3x-5>2x-3
    （x+1）÷2<2
    1-2x＜3
    254+0.92*(x-400)<=300
    274.01x^4+247.564x^3-16633x^2-193.473x+2109.3318>0

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