㏑1.2
    ㏑0.9
    ㏑¾
    1/3×100
    125:250
    62.5%
    2-√7
    lg8+3lg5
    21+235+66
    5154645×64846×64676+649
    0.1e^0.1
    0.1lne^0.1
    tan55*0.7
    tan55*70
    1.04∧-10
    1.04*-10
    （1+15.9％）^3
    4/3-1
    84/7+84/4+84/3=
    (-3/2)*ln(sqrt2/2)

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