Solutions by everydaycalculation.com
15 - 49 is -1145.
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Related: 2/5-4/9 1/5-8/9 1/10-4/9 1/5-4/18 3/5-4/9 1/5-12/9 1/15-4/9 1/5-4/27 1/5-20/9 1/25-4/9 1/5-4/45 7/5-4/9 1/5-28/9 1/35-4/9 1/5-4/63
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