1.0087 ^ X * 0.9887 ^ ( 1 - X ) >1
     1.0987 ^ X * 0.8987 ^ ( 1 - X ) >1
    4.6X^3+5.915X^2-52.79X-82.938>=0
    4500+168x>12500+58x
    2000+114x>6000+29x
    6000+25%（x－1）<4800x
    x＾2-6-x<0
    3/5x+3≤x-2/3-(1-2x)
    3/2*x-5
    (1-3x)/2<1-(2x-1)/3
    3m＾2＋24m＞0
    a^3>(0.3/1.4)^(1/3)
    0.6*a>0.7/a^2
    0.7*(0.6*a^2-0.7/a)/2/(0.7/a+0.3*a^2)>0.49*(0.7/a+0.3*a^2)
    0.5*(0.6*a^2-0.7/a)>(0.7/a+0.3*a^2)^1.5
    9/49*a^7-3/7*a^4+1/4*a>0.7+0.9*a^3+27/70*a^6+27/490*a^9
    1.0997 ^ X * 0.8997 ^ ( 1 - X ) >1
    1.0007 ^ X * 0.8997 ^ ( 1 - X ) >1
    0.55×（22-x）≤20
    0.55×（22-x）≥16

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