0.238×(18.7×3.9+19×5.3+9.4×1.4+10.1×3.1+10.7×6.2+20)+10×10.7
    3.852×10.7×0.9+10×0.9
    8.314×1623.15×{0.48×ln（0.48/0.98）+0.5×ln（0.5/0.98）-0.5×ln（0.5/0.99）-0.49×ln（0.49/0.99）}+663.318
    e^2.76528564
    e^4.4
     -92441.7-31575.3-133282+2×91759.4+140112
    15.22*125.65＋425.72*11.52+453.66*7.83+670.18*0.44-(6.47+1.45*0.93)*660.06-0.44*856.75
    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 )

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