Mathematics
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    7/23÷3/26+7/13
    (10+7.5/2)(500-40*7.5/2)
    2*(7.5/2)^2-5*(7.5/2)-25
    80e2-100+e
    1/arctan√8
    arctan√8
    log(2,1000)
    log(2,50001)
    lg50001/lg2
    lg50001
    lg50000
    1008/2.8
    100/23
    (1.618034)^8+(1/(1.618034)^8)
    (-0.618034)^8+(1/(-0.618034)^8)
    log(1099511627776)
    10*lg{1/8*[8*10^(0.1*78]}
    10*lg{1/8*[6*10^(0.1*78]}
    5+3*9+2
    2900÷26×19.5-(1050÷22×(22-19.5))-410

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