√(〖(5.56/170.81)〗^2+〖(57.01/275.5)〗^2 )
    551×500
    1×551×310
    √(〖(5.56/347.2)〗^2+〖(57.01/560)〗^2 )
    √(〖(148.8/347.2)〗^2+〖(277.15/560)〗^2 )
    √(〖(148.8/347.2)〗^2 )+〖(277.15/560)〗^2
    (63.6×10^3)/(2×14.25×73.48)
    〖((60+30/2)^2-〖(30/2)〗^2)〗^0.5
    (63.6×10^3)/(2×14.25×（60-2×30/3）)
    (63.6×10^3)/(2×14.25×44.5)
    2×14.25+16
    8+10×(80-30)/80
    2×16.33+16
    8+10×(80-30)/60
    (51954.00+95446.96×0.937)/(2×0.937)
    (51954.00-95446.96×0.937)/(2×0.937)
    8+10×(80-30)/35
    2×28+16
    8+10×(80-30)/25
    8+10×(80-30)/25

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