diff --git a/tex/latex/local/ntnu-math.sty b/tex/latex/local/ntnu-math.sty
index e394955..309f553 100644
--- a/tex/latex/local/ntnu-math.sty
+++ b/tex/latex/local/ntnu-math.sty
@@ -20,6 +20,8 @@
 \newcommand{\N}{\mathbb{N}}
 \newcommand{\Z}{\mathbb{Z}}
 
+\newcommand{\nCr}[2]{\,_{#1}C_{#2}}
+\newcommand{\nPr}[2]{\,_{#1}P_{#2}}
 
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