Solutions by everydaycalculation.com
18 - 26 is -524.
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Related: 2/8-2/6 1/8-4/6 1/16-2/6 1/8-2/12 3/8-2/6 1/24-2/6 1/8-2/18 5/8-2/6 1/8-10/6 1/40-2/6 1/8-2/30 7/8-2/6 1/8-14/6 1/56-2/6 1/8-2/42
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