Mathematics
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    69×0.6×0.6=
    20/(4/5)
    20*(4/5)
    40*120%
    sin65
    2^31
    e3
    15.3×0.64×0.6=
    3:.1
    15.3×0.6×0.6=
    7.8×0.6×0.6=
    3*.1
    67/5
    0.0/0
    9999999999+9999999999999999999999
    arctan(0.69)
    arctan3/4
    arctan4/3
    tan0.8
    cos0.8

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