Mathematics
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    13.8×1600×82.06÷330
    10+10=
    834413.48*(1+5%)
    31758800*(1+5%)
    5000000*(1+3%)
    3.2*(1+20%)/(1+2.2%)
    arctan(2/3)
    arcsin0.5728
    sin21
    sin21
    arcsin(5/8)
    arcsin5/8
    sin30
    sin30
    1/9*5.4
    12/44*8.8
    sin(arctan4+arctan0.25)=
    (sin1)(sin1)-2sin1
    sin1
    lg(1.0*10^3/2.8/10^-8)

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