6.566-(5.970+5.970)/2
    6.566-6.288
    lg3024
    √(〖29.81〗^2+3×〖14.05〗^2 )
    (309×10^3)/(2×550×20)
    (327.86×10^3)/(550×20)
    (2×309)/(2×π×0.3)
    309/62.65
    (298.3×10^6)/(0.85×2342086.57×215)
    1.07-0.282/1.26
    1.2×4320/〖125.93〗^2 ×(13538×560)/2342086.57 [√(1+((125.93×12.5)/(4.4×560))^2 )+0]×1
    (4000×12.5)/(166×560)
    4000/31.763
    (13.7×10^6)/(0.93×236865.58×215)
    1.07-〖79.71〗^2/44000
    1680/21.076
    3.671-(3.029+3.029)/2
    3.671-3.481
    √(〖94.27〗^2+3×〖44.42〗^2 )
    (977.3×10^3)/(2×550×20)

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