diff --git a/ws/Docbook/Extensions/Tdata/Components/exampleSlides.xml b/ws/Docbook/Extensions/Tdata/Components/exampleSlides.xml
index fc3cfaaf8c7ca00bc321869ee6db3d2d8704481a..05d1ed196fbb1b66751aaf3e7abeb2f40ca1dfe0 100644
--- a/ws/Docbook/Extensions/Tdata/Components/exampleSlides.xml
+++ b/ws/Docbook/Extensions/Tdata/Components/exampleSlides.xml
@@ -1,7 +1,9 @@
 <?xml version="1.0" encoding="UTF-8"?>
 <db:chapter version="5.0" xml:id="mixLectureSlides"
             xmlns:xlink="http://www.w3.org/1999/xlink"
+            xmlns:xila="http://www.w3.org/2001/XInclude/local-attributes"
             xmlns:xi="http://www.w3.org/2001/XInclude"
+            xmlns:trans="http://docbook.org/ns/transclusion"
             xmlns:svg="http://www.w3.org/2000/svg"
             xmlns:m="http://www.w3.org/1998/Math/MathML"
             xmlns:html="http://www.w3.org/1999/xhtml"
@@ -72,5 +74,63 @@
         </db:callout>
       </db:calloutlist>
     </db:section>
+
+    <db:section xml:id="MathML">
+      <db:title>Mathematical formulas</db:title>
+
+      <db:informalequation>
+        <m:math display="block">
+          <m:mrow>
+            <m:mrow>
+              <m:munderover>
+                <m:mo>∫</m:mo>
+
+                <m:mrow>
+                  <m:mo>-</m:mo>
+
+                  <m:mi mathvariant="normal">∞</m:mi>
+                </m:mrow>
+
+                <m:mrow>
+                  <m:mo>+</m:mo>
+
+                  <m:mi mathvariant="normal">∞</m:mi>
+                </m:mrow>
+              </m:munderover>
+
+              <m:mrow>
+                <m:msup>
+                  <m:mi>e</m:mi>
+
+                  <m:mrow>
+                    <m:mo>-</m:mo>
+
+                    <m:msup>
+                      <m:mi>x</m:mi>
+
+                      <m:mi>2</m:mi>
+                    </m:msup>
+                  </m:mrow>
+                </m:msup>
+
+                <m:mo>⁢</m:mo>
+
+                <m:mrow>
+                  <m:mo mathvariant="italic">d</m:mo>
+
+                  <m:mi>x</m:mi>
+                </m:mrow>
+              </m:mrow>
+            </m:mrow>
+
+            <m:mo>=</m:mo>
+
+            <m:msqrt>
+              <m:mi>π</m:mi>
+            </m:msqrt>
+          </m:mrow>
+        </m:math>
+      </db:informalequation>
+    </db:section>
   </db:section>
 </db:chapter>