Solutions by everydaycalculation.com
14 - 57 is -1328.
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Related: 2/4-5/7 1/4-10/7 1/8-5/7 1/4-5/14 3/4-5/7 1/4-15/7 1/12-5/7 1/4-5/21 5/4-5/7 1/4-25/7 1/20-5/7 1/4-5/35 7/4-5/7 1/4-35/7 1/28-5/7 1/4-5/49
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