Solutions by everydaycalculation.com
142 - 642 is -542.
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Related: 2/42-6/42 1/42-12/42 1/84-6/42 1/42-6/84 3/42-6/42 1/42-18/42 5/42-6/42 1/42-30/42 7/42-6/42
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