15.22*125.65＋425.72*11.52+453.66*7.83+670.18*0.44-(6.47+1.45*0.93+5.02)*660.06-0.44*856.75
    69900/(0.9×0.598×300)+75600/(0.8×0.76×300)
    (109900-0.3×72900)/(0.9×0.598×300)
    72800/(0.8×0.76×300)
    3.9/3
    132700/(0.9×0.598×300)+72800/(0.8×0.76×300)
    3.546/3
    3.546/2×181.613
    3.9/2×199.744
    √((43.09/1.22)^2+〖59.36〗^2 )
    (149.6×1000)/(7×360)
    (108.6×1000)/(7×360)
    √((27.70/1.22)^2+〖26.88〗^2 )
    (105.4×1000)/(7×560)
    (108.6×1000)/(7×560)
    (105400-0.3×108600)/(0.9×0.598×300)
    5.846/3×(2×106.906+181.613)/(106.906+181.613)
    108600/(0.8×0.76×300)
    5.846/2×(106.906+181.613)
    149600/(0.9×0.598×300)+108600/(0.8×0.76×300)

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