√-1
    （85.2%/43.5%）/（14.8%/56.5%）
    2.75/0.5
    10/-3
    (6*1000000)/(1+0.0364*90/365) =
    (6*1000000)/(1+0.0364*(90/365)) =
    (6*1000000)/(1+0.0364*90/365) =
    (6*1000000)/(1+3.640%*90/365) =
    7.68*1.9+21*0.768
    42462÷81347
    sqrt(6371012^2 - 6371000^2)
     1.2×（1.17）+1.4×0.9×（4.32）
    1.2×（1.17）+1.4×（4.32）
    (0.677×4.06×600^4)/(100×（2.06×10^5）×121867)
    25*7
    cos43
    5092+0.325*（100945-45000）=
    2200*(200%/3)*(108/365)*90%=
    32+4.9-0.9
    51.05-38.90

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