In set theory, the difference operation determines which elements from one set do not appear in the elements of another given set.

In set theory, the intersect operation determines which elements from a set intersect with elements from any given sets.

In set theory, the union operation is a enumerative combinatorial function that combines distinct elements found in any of the given sets.

The insertion sort is a simple sorting algorithm that sorts an array (or list) one item at a time.

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