Mathematics
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    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
    1e3
    (1665+330*0.05-690.694444)*1.8*1.08*1.2*0.8

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