(1285.86×(15.1/3×(2×14.28+207.42)/(14.28+207.42)))/1285.86
    (18.69×(1.78/3+15.1)+2077.84×(15.1/3×（2×35.68+239.53）/（35.68+239.53））)/(2599.63-503.1)
    (18.69×(1.78/3+15.1)+2077.84×(15.1/3×（2×35.68+239.53）/（35.68+239.53））/(2599.63-503.1)
    (18.69×(1.78/3+15.1)+2077.84×(15.1/3×（2×35.68+239.53）/（35.68+239.53））-503.1×（3.9/3×（115.01+2×142.99）/(115.01+142.99)））/2599.63
    40.5*sin30
    40.5*sin27.5
    40.5*cos27.5
    40.5*tan27.5
    40.5*tan27
    40.5*tan28
    41*tan28
    41*tan30
    40*tan30
    40*tan15
    e(-e(-5.47))
    0.5×650.23
    1-√（1-2×0.002842）
    40.64*1000000/(1*14.3*1000*1000*1000)
    40.64/(1*14.3*1000*1000*1000)
    2378.73×(7.778741-3.625993)/(17.1+2.29-0.4)

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