Mathematics
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    2√2/2√2+1
    2√2/2√2+4
    arctan(-2)
    √0.2×8.9
    √0.795
    5*-0.4*6
    2^2
    1372.86*86506=
    1098.89*94206
    785.36*112406=
    log(3,27)
    cos78
    sin78
    cos78
    acos-0.20790308
    acos-0.20790308
    arccos(-0.2079)
    1+1
    80/3+20
    (8/36)*(18/12)

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