√(〖39.97〗^2+3×〖18.83〗^2 )
    (226×10^3)/(2×300×20)
    (239.79×10^3)/(300×20)
    (2×226)/(2×π×0.3)
    226/62.65
    2.697-(2.679+2.519)/2
    (12.5×10^6)/(0.90×236865.58×215)
    1.07-〖85.41〗^2/44000
    1800/21.076
    3.468-(2.690+2.671)/2
    √(〖63.13〗^2+3×〖29.75〗^2 )
    (654.5×10^3)/(2×550×20)
    (694.45×10^3)/(550×20)
    (2×654.5)/(2×π×0.3)
    654.5/62.65
    5.502-(0.035+0.045)/2
    (16.2×10^6)/(0.82×236865.58×215)
    1.07-〖96.51〗^2/44000
    2034/21.076
    6.056-(5.506+4.518)/2

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