Mathematics
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    sqrt(9)
    arctane-arctan1
    !(5)
    sin30
    sin30
    arcsin1
    arcsin1
    5/(5+4sin4.71)
    5/(5+4sin1.57)
    5/(5+4sin5.11)
    tan(√6/2)
    tan(√6/2)
    arctan0.4203753448526208799186873820241033831857
    arctan1.5065620998719590268886043533930857874519
    -arctan0.05
    12/100*12
    2.3×1.4×1.83
    sin0/0
    sin0.0001/0.0001
    sin0.001/0.001

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