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diff --git a/mjo-common.tex b/mjo-common.tex
index e746484..27c4c7b 100644
--- a/mjo-common.tex
+++ b/mjo-common.tex
@@ -37,6 +37,18 @@
 % A triple of things.
 \newcommand*{\triple}[3]{ \left({#1},{#2},{#3}\right) }
 
+% A four-tuple of things.
+\newcommand*{\quadruple}[4]{ \left({#1},{#2},{#3},{#4}\right) }
+
+% A five-tuple of things.
+\newcommand*{\quintuple}[5]{ \left({#1},{#2},{#3},{#4},{#5}\right) }
+
+% A six-tuple of things.
+\newcommand*{\sextuple}[6]{ \left({#1},{#2},{#3},{#4},{#5},{#6}\right) }
+
+% A seven-tuple of things.
+\newcommand*{\septuple}[7]{ \left({#1},{#2},{#3},{#4},{#5},{#6},{#7}\right) }
+
 % The Cartesian product of two things.
 \newcommand*{\cartprod}[2]{ {#1}\times{#2} }