93678/23146
    2/23146
    1/1933
    773*12936610608020698577
    773*129366106080207
    772*3886
    10^6+3422
    (517.54+2.29+57.40)/(1.15×(5×0.6+0.55) )
    0.644×(5×0.6+0.55)
    (25×0.51+19×0.18)×(5×0.6+0.55)
    50+0+1.6×19.8×(0.6-0.5)
    √((156.32/270)^2+(141.24/155)^2 )
    (710×10^3×166)/(15×(π×80^3)/32)
    (710×10^3)/(1×π×80^2/4)
    ［2046×（1+0.0543）×1.1245×1.1913+0］×0.9611
    ［1-1/（1+6.50%）^47.39］/［1-1/（1+6.50%）^70］
    1.02^5.92
    1.1×1.0×（8.38/1.0+0.05+0.02+0.3+0.13）
    (64.1×10^6)/(0.77×401449.28×215)
    9.204-(2.562+2.491)/2

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