Solutions by everydaycalculation.com
18 - 47 is -2556.
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Related: 2/8-4/7 1/8-8/7 1/16-4/7 1/8-4/14 3/8-4/7 1/8-12/7 1/24-4/7 1/8-4/21 5/8-4/7 1/8-20/7 1/40-4/7 1/8-4/35 7/8-4/7 1/8-28/7 1/56-4/7 1/8-4/49
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