Solutions by everydaycalculation.com
342 - 642 is -114.
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Related: 6/42-6/42 3/42-12/42 3/84-6/42 3/42-6/84 9/42-6/42 3/42-18/42 15/42-6/42 3/42-30/42 21/42-6/42
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