Mathematics
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    arctan(-1.36)
    arctan((1256*0.1-1/1256*0.5*10^(-6))/200)
    arctan-2.725
    arctan-2.725
    arctan(0.628)
    sin47.07
    arctan0.734
    arctan1.075
    88+555-999
    arctan6.279992
    1255.9984/200
    1256-0.0016
    1/2*3.14*0.000005*200
    1/2*3.14*0.000005*200
    arctan6.28
    arctan6.28
    arctan6.28
    1255.999998/200
    1256-0.000002
    1/2*3.16*0.000001

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