Mathematics
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    arctan(sqrt(2))
    arctan(sqrt(2))
    arctan(sqrt(2))
    arctan0.5
    arctan2
    arccos0.767
    2*sqrt(0.2*0.2+2*2)/0.2
    arctan(1/8)
    √(〖(35.1/347.2)〗^2+〖(105.2/560)〗^2 )
    (42.06×0.1)/(〖0.1〗^2×4)
    140.2/4
    √(〖16.9〗^2+3×〖20.8〗^2 )
    (140.2×10^3×941600)/(317419696×20)
    (140.2×10^3×1173585.8)/(317419696×20)
    (42.06×10^6)/1310027.6
    (42.06×10^6)/2485667.2
    317419696/(370-242.3-20)
    317419696/242.3
    317419696/(370-242.3)
    400×20×(127.7-10)

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