Solutions by everydaycalculation.com
37 - 89 is -2963.
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Related: 6/7-8/9 3/7-16/9 3/14-8/9 3/7-8/18 9/7-8/9 3/7-24/9 3/21-8/9 3/7-8/27 15/7-8/9 3/7-40/9 3/35-8/9 3/7-8/45 21/7-8/9 3/7-56/9 3/49-8/9 3/7-8/63
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