Solutions by everydaycalculation.com
18 - 49 is -2372.
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Related: 2/8-4/9 1/8-8/9 1/16-4/9 1/8-4/18 3/8-4/9 1/8-12/9 1/24-4/9 1/8-4/27 5/8-4/9 1/8-20/9 1/40-4/9 1/8-4/45 7/8-4/9 1/8-28/9 1/56-4/9 1/8-4/63
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