√(〖55.13〗^2+3×〖25.98〗^2 )
    (571.5×10^3)/(2×550×20)
    (606.38×10^3)/(550×20)
    (2×571.5)/(2×π×0.3)
    571.5/62.65
    (385.8×10^6)/(0.85×2342086.57×215)
    (458.8×10^6)/(0.85×2342086.57×215)
    (12.8×10^6)/(0.93×236865.58×215)
    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)

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