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
    1.1^X*0.9^（1-X）>1
    50m(9-m)≥1000
    1+2x/x-1<3
    y<=1/3(1000-y)
    2.77X^3-4.305X^2-67.1X-83.0967>=0
    10^x>0
    -2.77X^3+4.305X^2+67.1X+83.0967>=0

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