Mathematics
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    1.84×30.34
    144.3/4.755
    100/1.005
    200/10.5/10.5
    0.4×5×100/10.5²
    1.51×5.47
    2.55×5.47
    5.5/1.005
    0.4×5×100/10.5²
    arccos0.5
    arccos0.5
    arccos0.5
    arccos0.5
    arccos0.5
    arccos0.58
    729.94/785.83=
    arccos0.58
    sinarccos0.58
    2*arccos0.58
    arccos0.58

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