Solutions by everydaycalculation.com
26 - 68 is -512.
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Related: 4/6-6/8 2/6-12/8 2/12-6/8 2/6-6/16 2/6-18/8 2/18-6/8 2/6-6/24 10/6-6/8 2/6-30/8 2/30-6/8 2/6-6/40 14/6-6/8 2/6-42/8 2/42-6/8 2/6-6/56
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