diff --git a/slides/chapter-09.de.md b/slides/chapter-09.de.md
index 1b72247..6a14fc5 100644
--- a/slides/chapter-09.de.md
+++ b/slides/chapter-09.de.md
@@ -57,6 +57,10 @@ Einige Beispiele
     <td>`12 \leq 4 x^2 + 13`</td>
     <td>$12 \leq 4 x^2 + 13$</td>
   </tr>
+  <tr class="fragment">
+    <td>`{n \choose k}`</td>
+    <td>${n \choose k}$</td>
+  </tr>
 </table>
 
 ++ Durch `^{…}` und `_{…}` werden die Inhalte in den Klammern hoch- oder tiefgestellt.
diff --git a/slides/chapter-09.en.md b/slides/chapter-09.en.md
index 1456986..51479c0 100644
--- a/slides/chapter-09.en.md
+++ b/slides/chapter-09.en.md
@@ -59,6 +59,10 @@ Examples
     <td>`12 \leq 4 x^2 + 13`</td>
     <td>$12 \leq 4 x^2 + 13$</td>
   </tr>
+  <tr class="fragment">
+    <td>`{n \choose k}`</td>
+    <td>${n \choose k}$</td>
+  </tr>
 </table>
 
 ++ `^{…}` and `_{…}` make the content between the braces appear as sub- or superscripted.