Solutions by everydaycalculation.com
1221 - 1415 is -38105.
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Related: 24/21-14/15 12/21-28/15 12/42-14/15 12/21-14/30 36/21-14/15 12/21-42/15 12/63-14/15 12/21-14/45 60/21-14/15 12/21-70/15 12/21-14/75 84/21-14/15 12/21-98/15
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