(x+1)(x+2)＞0
    5x（x+871）＞7888
    13u^2+u+57>0
    2*n-48>0 2*(n-1)-48<=0
    e^x＜x^(ln(sinx)x)
    x-11＜-18
    （2x-1）/3-(9x-2)/6≤1
    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

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