Mathematics
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    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
    72-(36+12)
    32+8/8
    15-6*2
    20-8+12
    88-(45-16)
    37+27/3
    28/7*6
    35+21/7

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