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Omni-MATH / Four distinct integers a,b,c, and d are chosen from the set 1,2,3,4,5,6,7,8,9,10. What is the greatest possible value of ac+bd−ad−bc? · Discussion

Discussing Four distinct integers a,b,c, and d are chosen from the set {1,2,3,4,5,6,7,8,9,10}. What is the greatest possible value of ac+bd−ad−bc? · Omni-MATH

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