√((54.99/280)^2+(54.99/160)^2 )
    (276.4×0.15×10^6)/(15×(π×80^3)/32)
    (276.4×10^3)/(1×π×80^2/4)
    √(〖29.33〗^2+3×〖13.82〗^2 )
    (276.4×10^3)/(2×500×20)
    (293.27×10^3)/(500×20)
    (2×276.4)/(2×π×0.3)
    276.4/39.7
    (148.3×10^6)/(0.71×1138750×215)
    (4.8×10^6)/(0.92×237000×215)
    4.557-(4.325+4.324)/2
    4.324-1.199
    1/2×1.25×〖38.90〗^2×2.0×0.426
    1/2×1.25×〖38.90〗^2×2.05×0.4
    1/2×1.25×〖38.90〗^2×2.05×3555.5×10^(-6)
    1.17×361.58
    1.17×272.02
    1.17×411.99
    1.17×396.36
    1.17×233.18

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