Solutions by everydaycalculation.com
78 - 57 is 956.
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Related: 14/8-5/7 7/8-10/7 7/16-5/7 7/8-5/14 21/8-5/7 7/8-15/7 7/24-5/7 7/8-5/21 35/8-5/7 7/8-25/7 7/40-5/7 7/8-5/35 49/8-5/7 7/8-35/7 7/56-5/7 7/8-5/49
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