Solutions by everydaycalculation.com
35 - 57 is -435.
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Related: 6/5-5/7 3/5-10/7 3/10-5/7 3/5-5/14 9/5-5/7 3/5-15/7 3/15-5/7 3/5-5/21 15/5-5/7 3/5-25/7 3/25-5/7 3/5-5/35 21/5-5/7 3/5-35/7 3/35-5/7 3/5-5/49
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