% Needed for \mathbb.
\usepackage{amsfonts}
+% Needed for \bigtimes.
+\usepackage{mathtools}
+
% Place the argument in matching left/right parntheses.
\providecommand*{\of}[1]{ \left({#1}\right) }
{ {#1}_{#2}^{#3}{#4} }
}
-\providecommand*{\intersectmany}[3]{ \binopmany{\cap}{#1}{#2}{#3} }
-\providecommand*{\cartprodmany}[3]{ \binopmany{\times}{#1}{#2}{#3} }
-\providecommand*{\directsummany}[3]{ \binopmany{\oplus}{#1}{#2}{#3} }
-\providecommand*{\unionmany}[3]{ \binopmany{\cup}{#1}{#2}{#3} }
+\providecommand*{\intersectmany}[3]{ \binopmany{\bigcap}{#1}{#2}{#3} }
+\providecommand*{\cartprodmany}[3]{ \binopmany{\bigtimes}{#1}{#2}{#3} }
+\providecommand*{\directsummany}[3]{ \binopmany{\bigoplus}{#1}{#2}{#3} }
+\providecommand*{\unionmany}[3]{ \binopmany{\bigcup}{#1}{#2}{#3} }