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(1)66 - 4 =
(2)71 - 9 =
(3)50 - 1 =
(4)60 - 9 =
(5)26 - 9 =
(6)24 - 8 =
(7)13 - 4 =
(8)32 - 1 =
(9)29 - 5 =
(10)30 - 1 =
(11)48 - 7 =
(12)36 - 1 =
(13)74 - 2 =
(14)34 - 1 =
(15)61 - 4 =
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