Solutions by everydaycalculation.com
742 - 1442 is -16.
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Related: 14/42-14/42 7/42-28/42 7/84-14/42 7/42-14/84 21/42-14/42 35/42-14/42 7/42-70/42 49/42-14/42 7/42-98/42
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