Mathematics
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    283.2÷0.8
    tan(arccos0.8 )
    377.6×0.75
    0.8×(230+150+44+3+11+34)
    78/√3/220
    62.4/0.8
    62.4×0.75
    tan(arccos0.8 )
    0.8×(8+20+50)
    23.23×1.73
    46.47×0.5
    2*30*√(60% )
    tan(arccos0.5)
    tan(arccos(0.5) )
    30e-6
    1.26e-09
    9e-6
    1998/(1998/1999)
    √((12cosπ/3)^^3)
    (3000000*(0.0033+0.003))*1.2*0.68

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