Solutions by everydaycalculation.com
25 - 67 is -1635.
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Related: 4/5-6/7 2/5-12/7 2/10-6/7 2/5-6/14 6/5-6/7 2/5-18/7 2/15-6/7 2/5-6/21 10/5-6/7 2/5-30/7 2/25-6/7 2/5-6/35 14/5-6/7 2/5-42/7 2/35-6/7 2/5-6/49
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