1/1+x＞0
    -3x*x-2x+13>0
    1÷3x+1÷3×(x+1)>1
    2*sin(x) + 5 > 3
    2x^2 - 7x - 3 ≤ 0
    （2024/2023）^2024＞e
    10000/x+20000/(x+60)≤142
    10000/x+20000/(x+60)+17500/x+10000/(x+60)≤250
    10000/x+20000/(x+60)+17500/x+10000/x≤250
    10000/x+20000/(x+60)+17500/x+10000x≤250
    10000/x+20000/(x+60)+17500/x≤250
    [10000/x+20000/(x+60)]+17500/x+10000/x≤250
    [10000/x+20000/(x+60)]+17500/x+10000/x≤250
    [10000/x+20000/(x+60)]+17500/x≤250
    250-[10000/x+20000/(x+60)]≥17500/x
    250-[10000/x+20000/(x+60)]≥17500/x+10000/(x+60)
    250-[10000/x+20000/(x+60)]≥17500/x+10000/(x+60)＞0
    250-[10000/x+20000/(x+60)]≥17500/x+20000/(x+60)＞0
    0＜10000/x+20000/(x+60)≤10000/7， 250-[10000/x+20000/(x+60)]≥17500/x+20000/(x+60)＞0
    10000/x+20000/(x+60)≤10000/7， 250-[10000/x+20000/(x+60)]≥17500/x+20000/(x+60)

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