54+5
    537.95×918.85×0.39
    1389.59×794.74×0.4
    2157.52×1102.03×0.495
    2157.52×1102.03×0.5
    591.68×689.96×0.4
    537.95×918.85×0.4
    280.17×918.85×0.59
    414.65×585.78×0.4
    1389.59×794.74×0.495
    591.68×689.96×0.495
    150.38×585.78×0.4
    184.91×918.85×0.495
    603.85×689.96×0.495
    8*0.723*4.83+16*0.723*3.85
    ( 2)( 2) ( 1)( 5)
    10/cos50
    550+60+20+21.5+13.58
    27.5×[（1+0.0435）^1-1]
    800+60+20+21.5+18.83

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