Solutions by everydaycalculation.com
25 - 512 is -160.
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Related: 4/5-5/12 2/5-10/12 2/10-5/12 2/5-5/24 6/5-5/12 2/5-15/12 2/15-5/12 2/5-5/36 10/5-5/12 2/5-25/12 2/25-5/12 2/5-5/60 14/5-5/12 2/5-35/12 2/35-5/12 2/5-5/84
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