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78 - 23 is 524.
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Related: 14/8-2/3 7/8-4/3 7/16-2/3 7/8-2/6 21/8-2/3 7/8-6/3 7/24-2/3 7/8-2/9 35/8-2/3 7/8-10/3 7/40-2/3 7/8-2/15 49/8-2/3 7/8-14/3 7/56-2/3 7/8-2/21
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