Solutions by everydaycalculation.com
828 - 712 is -2584.
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Related: 16/28-7/12 8/28-14/12 8/56-7/12 8/28-7/24 24/28-7/12 8/28-21/12 8/84-7/12 8/28-7/36 40/28-7/12 8/28-35/12 8/28-7/60 56/28-7/12 8/28-49/12 8/28-7/84
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