-3/8 . 2/13 + 3/-8 . 2 11/13 + 9 3/8 5 1/2 - 14 3/7 : 9/13 - 3 4/7 : 9/13 ( 7/8 - 3/4 ) . 1 1/3 - 2/7 . ( 3,5) ^ 2

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