Solutions by everydaycalculation.com
442 - 1242 is -421.
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Related: 8/42-12/42 4/42-24/42 4/84-12/42 4/42-12/84 12/42-12/42 4/42-36/42 20/42-12/42 4/42-60/42 28/42-12/42 4/42-84/42
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