Union
$$A \cup B =$$
{ agent, forming, norming, other, performing, product, storming, truth }
Symmetric Difference
$$A \ominus B =$$
{ agent, forming, norming, other, performing, product, storming, truth }
Difference
$$A - B =$$
{ forming, norming, performing, storming }
Difference
$$B - A =$$
{ agent, other, product, truth }
Cartesian Product
$$A \times B =$$
{ (forming, agent),
(forming, other),
(forming, product),
(forming, truth),
(norming, agent),
(norming, other),
(norming, product),
(norming, truth),
(performing, agent),
(performing, other),
(performing, product),
(performing, truth),
(storming, agent),
(storming, other),
(storming, product),
(storming, truth) }