Solutions by everydaycalculation.com
621 - 1621 is -1021.
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Related: 12/21-16/21 6/21-32/21 6/42-16/21 6/21-16/42 18/21-16/21 6/21-48/21 6/63-16/21 6/21-16/63 30/21-16/21 6/21-80/21 42/21-16/21
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