（1.06）^1.5
    1.01^365
    lg(0.2)
    （207.5-517.399725）/207.5=
    309.399725+208
    9.599557+0.643348*466
    1乘8
    90+arctan2
    8^1/2
    9^1/2
    4^1/2
    0.623/4
    90-arctan2-arctan(0.2*2)
    0.5705^(4)*125
    0.5705^(2)*125
    0.5705^(4/3)*125
    3500*365*（（1+6.5%）^30-1）/6.5%*0.22
    10^4/(0.09+0.96/3.05)
    10*10^-6*29*10^3*0.24*86/2*0.465
    500/30

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