Solutions by everydaycalculation.com
212 - 512 is -14.
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Related: 4/12-5/12 2/12-10/12 2/24-5/12 2/12-5/24 6/12-5/12 2/12-15/12 2/36-5/12 2/12-5/36 10/12-5/12 2/12-25/12 2/60-5/12 2/12-5/60 14/12-5/12 2/12-35/12 2/84-5/12 2/12-5/84
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