Mathematics
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    1.6666666×6
    1.66666666666666666666×6
    3+2-1×5÷9
    1÷6×6
    1÷3×3
    1÷7×7
    250+250*52%
    21×3
    2×30
    2×3
    4*4
    110-51
    100-59
    10-9
    3^2
    9^9
    1+2*9=
    1+2*9
    (1+2)*2
    1+1

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