Union
$$A \cup B =$$
{ activist, analysis, collection, dissemination, feedback, pragmatist, processing, reflector, requirements, theorist }
Symmetric Difference
$$A \ominus B =$$
{ activist, analysis, collection, dissemination, feedback, pragmatist, processing, reflector, requirements, theorist }
Difference
$$B - A =$$
{ analysis, collection, dissemination, feedback, processing, requirements }
Cartesian Product
$$A \times B =$$
{ (activist, analysis),
(activist, collection),
(activist, dissemination),
(activist, feedback),
(activist, processing),
(activist, requirements),
(pragmatist, analysis),
(pragmatist, collection),
(pragmatist, dissemination),
(pragmatist, feedback),
(pragmatist, processing),
(pragmatist, requirements),
(reflector, analysis),
(reflector, collection),
(reflector, dissemination),
(reflector, feedback),
(reflector, processing),
(reflector, requirements),
(theorist, analysis),
(theorist, collection),
(theorist, dissemination),
(theorist, feedback),
(theorist, processing),
(theorist, requirements) }