Solutions by everydaycalculation.com
29 - 37 is -1363.
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Related: 4/9-3/7 2/9-6/7 2/18-3/7 2/9-3/14 6/9-3/7 2/9-9/7 2/27-3/7 2/9-3/21 10/9-3/7 2/9-15/7 2/45-3/7 2/9-3/35 14/9-3/7 2/9-21/7 2/63-3/7 2/9-3/49
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