10*((1.25*0.103)^2+1)^(0.5)/((1.25*0.2)^2+1)^(0.5)/((1.25*0.5)^2+1)^(0.5)/((1.25)^2+1)^(0.5)/1.25
    10*((1.25*0.103)^2+1)^0.5/((1.25*0.2)^2+1)^0.5/((1.25*0.5)^2+1)^0.5/((1.25)^2+1)^0.5/1.25
    0.103*9.71
    10/1.03
    （9.6+(12-9.6)/(100000-50000)*(86155.45-50000)）*1.0*0.9
    （19.6*7.1+20*6.8）/13.9
    （18.1*0.8+18.4*3.7+18.3*7.3+19.6*7.4+20*6.8）/26
    （44+（44-29.6）/（100000-50000）*（86155.45-50000））*1.0*0.9
    1772.94*9.48+3521.14*3.08+111.1*24+354.91*19.5-1.25（1554.66*14.24+1190.01*3.19）
    （44+（44-29.6）*（100000-50000）*（86155.45-50000））*1.0*0.9
    1.4107/3300
    894.87*7.86+363.77*2.06-111.1*14.51-373.47*10.01-792.96*1.74
    4＾1.5
    1/4＾3/2
    (8.63*11.64+8.7*8.13+857.86*3.4+19.68*0.15)/894.87
    0.3018*1.22
    tan120
    tan70＋tan50
    17.33*6.86+448.51*2.03-111.1*7.08-354.91*2.58
    2∧5＋2∧6

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