Solutions by everydaycalculation.com
424 - 1424 is -512.
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Related: 8/24-14/24 4/24-28/24 4/48-14/24 4/24-14/48 12/24-14/24 4/24-42/24 4/72-14/24 4/24-14/72 20/24-14/24 4/24-70/24 28/24-14/24 4/24-98/24
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