10^(4.58/20)
    √((13.87/109.32)^2+(85.80/176.50)^2 )
    √((13.87/109.32)^2+(85.80/176.50)^2 )
    (75.5×10^6×220)/193600
    83.2/6
    √((20.8/109.32)^2+(163.85/176.50)^2 )
    (75.5×10^6×180)/82944
    20*lg0.032
    20*lg0.8
    20*lg200
    lg2
    20*lg2
    0.1×16.7×(2.3×300^2+100×460)
    √((20.8/109.32)^2+(104.86/176.50)^2 )
    (75.5×10^6×180)/129600
    √((13.87/109.32)^2+(85.80/176.50)^2 )
    (75.5×10^6×220)/193600
    (37.9×10^6)/(0.87×237000×215)
    (108.8×10^6×220)/193600
    (37.9×10^6)/(0.87×49000×215)

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