If A=1,2,3A = \\{1, 2, 3\\}A=1,2,3 and B=3,4,5B = \\{3, 4, 5\\}B=3,4,5, what is AcupBA \\cup BAcupB?
3\\{3\\}3
1,2,3,4,5\\{1, 2, 3, 4, 5\\}1,2,3,4,5
1,2,4,5\\{1, 2, 4, 5\\}1,2,4,5
1,2,3,3,4,5\\{1, 2, 3, 3, 4, 5\\}1,2,3,3,4,5