0.059x+200*0.059<0.061x
    0.063x<0.061x+x/1000*1.5
    0.24/153<(1.4-x/278)/(x+25) x>265
    0.24/153<(1.4-x/278)/(x+25)
    （1.4-x/278）*（x+25）>44.37
    （1.4-x/278）*（x+0.25）>44.37
    1.4-x/278>5
    1200×x/10≥800×(1+5%)
    x/5≥3+（x-2）/2
    x/2-x/3＜1
    6（x-1）≥3+4x
    2（x-3）+7＞11
    45-a≤a≤35
    (1-x)/x>=14.88
    e^x＜x^(lnx)
    x1+2*x2+x4<=100 3*x3+x4<=100 3*x2+x3+x4<=100 2*x1+x2+2*x3+5*x4<=100 x1+3*x3+2*x4<=100
    1/（x^2-2x+5）＜0
    x^2-2x+5＜0
    x^2-3x-4<0
    3x^2-7x<10

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