(144.2×10^3)/(0.567×912×305)
    (144.2×10^3)/(0.955×912×305)
    (22.8×10^6)/(1.0×237000×215)
    4.352-(1.165+0.459)/2
    14.480-14.235
    14.653-(13.906+14.601)/2
    (143.6×10^3)/(0.567×912×305)
    (168.4×10^3)/(0.567×912×305)
    (168.4×10^3)/(0.955×912×305)
    (22.5×10^6)/(1.0×237000×215)
    1.07-〖42.45〗^2/(44000×1)
    900/21.2
    cos0
    cos90
    cos35.906
    cos35.9060
    cos35.9060
    161.4389*cos35.9060
    1+1=
    ln19999/ln10000

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