Solutions by everydaycalculation.com
742 - 842 is -142.
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Related: 14/42-8/42 7/42-16/42 7/84-8/42 7/42-8/84 21/42-8/42 7/42-24/42 35/42-8/42 7/42-40/42 49/42-8/42 7/42-56/42
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