arccos(10.5/14.1)
    arccos(14.5/10.5)
    ln(100/110)+(0.05+0.5)*1
    -14.52+71.703*e^(-5%)
    -100+100*0.6736+110*e^(-5%)*0.7088
    log（2，5）
    [(37.365760-0.076800)+1/(15-1)-1]-2*0.002
    [(37.365760-0.076800)1/(15-1)-1]-2*0.002
    [(0.09900-0.0768)1/(15-1)-1]-2*0.002
    （23.31-5.95）/23.31
    （20.33-4.46）/20.33
    （17.86-3.47）/17.86
    （20.331-4.96）/20.33
    （23.31-5.46）/23.31
    （26.79-7.44）/26.79
    3.56*72*0.0028
    4.66*72*0.0028
    5.33*72*0.0028
    7.46*72*0.0028
    18.12*72*0.0028

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