Solutions by everydaycalculation.com
18 - 56 is -1724.
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Related: 2/8-5/6 1/8-10/6 1/16-5/6 1/8-5/12 3/8-5/6 1/8-15/6 1/24-5/6 1/8-5/18 5/8-5/6 1/8-25/6 1/40-5/6 1/8-5/30 7/8-5/6 1/8-35/6 1/56-5/6 1/8-5/42
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