Solutions by everydaycalculation.com
221 - 89 is -5063.
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Related: 4/21-8/9 2/21-16/9 2/42-8/9 2/21-8/18 6/21-8/9 2/21-24/9 2/63-8/9 2/21-8/27 10/21-8/9 2/21-40/9 2/21-8/45 14/21-8/9 2/21-56/9 2/21-8/63
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