Solutions by everydaycalculation.com
19 - 49 is -13.
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Related: 2/9-4/9 1/9-8/9 1/18-4/9 1/9-4/18 3/9-4/9 1/9-12/9 1/27-4/9 1/9-4/27 5/9-4/9 1/9-20/9 1/45-4/9 1/9-4/45 7/9-4/9 1/9-28/9 1/63-4/9 1/9-4/63
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