Mathematics
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    (40-8)/4
    18/(6/2)
    18/6*2
    24/(3*2)
    24/(3*2)
    24/3/2
    24/3/2
    75-(39+21)
    75-39-21
    6-(25+7)
    (23+25)/8
    18+24/6
    28+3*6
    45/(9-4)
    8*3+54
    6+21/3
    (88-56)/8
    81-8+15
    76+67
    7+68

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