Solutions by everydaycalculation.com
58 - 56 is -524.
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Related: 10/8-5/6 5/8-10/6 5/16-5/6 5/8-5/12 15/8-5/6 5/8-15/6 5/24-5/6 5/8-5/18 25/8-5/6 5/8-25/6 5/40-5/6 5/8-5/30 35/8-5/6 5/8-35/6 5/56-5/6 5/8-5/42
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