Mathematics
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    1/(3.2*sqrt(7.97))
    (1+sin51)/(1-sin51)
    90+arctan(1.036*3.67)-arctan(0.25*3.67)-arctan(0.074*3.67)
    (2+sqrt(3))/(2-sqrt(3))
    180-arctan2-arctan0.5
    9.55*50+20
    1/2×1.25×〖38.90〗^2×2.0×1.020
    90+arctan(15*0.313)-arctan(2*0.313)-arctan(166*0.313)
    90+arctan(76*1.3)-arctan(2*1.3)-arctan(81*1.3)
    90+arctan(76*1.3)-arctan(2*1.3)-arctan(81*1.3)
    90+arctan(7.7*0.65)-arctan(2*0.65)-arctan(29*0.65)
    90+arctan(15.16*0.65)-arctan(2*0.65)-arctan(57*0.65)
    90+arctan(7.714*0.65)-arctan(2*0.65)-arctan(29*0.65)
    90+arctan(7.714*0.65)-arctan(2*1.65)-arctan(29*0.65)
    90+arctan(7.714*0.65)-arctan(2*0.65)-arctan(29*0.65)
    90+arctan(7.714*0.65)-arctan(2*0.56)-arctan(29*0.65)
    90+arctan(7.14*0.26)-arctan(2*0.26)-arctan(29*0.26)
    90+arctan(13.86*0.76)-arctan(2*0.76)-arctan(126*0.76)
    90+arctan(17*0.574)-arctan(2*0.574)-arctan(78*0.574)
    90+arctan(8.8*0.583)-arctan(2*0.583)-arctan(40*0.583)

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