Returns elements in the first list but not in any of the other lists.
Complement[e all, e1, e2, …]
Complement[{1, 2, 3, 4, 5}, {2, 4}]
→ {1, 3, 5}Complement[{a, b, c, d}, {b, d}]
→ {a, c}Complement[{1, 2, 3}, {1, 2, 3}]
→ {}Complement[{1, 2, 3, 4}, {2}, {4}]
→ {1, 3}