Solutions by everydaycalculation.com
1221 - 56 is -1142.
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Related: 24/21-5/6 12/21-10/6 12/42-5/6 12/21-5/12 36/21-5/6 12/21-15/6 12/63-5/6 12/21-5/18 60/21-5/6 12/21-25/6 12/21-5/30 84/21-5/6 12/21-35/6 12/21-5/42
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