Solutions by everydaycalculation.com
928 - 1428 is -528.
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Related: 18/28-14/28 9/56-14/28 9/28-14/56 27/28-14/28 9/28-42/28 9/84-14/28 9/28-14/84 45/28-14/28 9/28-70/28 63/28-14/28 9/28-98/28
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