(1472.5×10^3)/25452
    (796.7×10^6×610.1)/(36.47×10^8 )
    (796.7×10^6×342.9)/(36.47×10^8 )
    (910×7^3)/12+910×7×〖339.4〗^2+(850×7^3)/12+850×7×〖302.4〗^2+(4×7×909^3)/12+4×7×909×〖155.6〗^2
    3.85/0.7
    3.85/0.7
    3.85/0.7
    3.85/0.7
    3.85/0.7
    3.85/0.7
    3.85/0.7
    3.85/0.7
    3.85/0.7
    7.2*8
    71.2/8
    6.8*0.7
    75*20%
    (910×7×3.5+850×7×40.5+4×909×7×498.5)/(910×7+850×7+4×909×7)
    √((9.09×2563.92×10^6)/(1000×1.43))
    √((9.09×2563920)/(1000×1.43))

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