Union
$$A \cup B =$$
{ committee, ecology, forming, hierarchy, matrix, norming, performing, storming }
Symmetric Difference
$$A \ominus B =$$
{ committee, ecology, forming, hierarchy, matrix, norming, performing, storming }
Difference
$$A - B =$$
{ committee, ecology, hierarchy, matrix }
Difference
$$B - A =$$
{ forming, norming, performing, storming }
Cartesian Product
$$A \times B =$$
{ (committee, forming),
(committee, norming),
(committee, performing),
(committee, storming),
(ecology, forming),
(ecology, norming),
(ecology, performing),
(ecology, storming),
(hierarchy, forming),
(hierarchy, norming),
(hierarchy, performing),
(hierarchy, storming),
(matrix, forming),
(matrix, norming),
(matrix, performing),
(matrix, storming) }