diff --git a/_layouts/default.html b/_layouts/default.html
index 92cae69..4250be8 100644
--- a/_layouts/default.html
+++ b/_layouts/default.html
@@ -18,6 +18,7 @@
     <meta name="theme-color" content="#ffffff">
 
 {% seo %}
+
     <link rel="stylesheet" href="{{ "/assets/css/style.css?v=" | relative_url }}">
     <!--[if lt IE 9]>
     <script src="https://cdnjs.cloudflare.com/ajax/libs/html5shiv/3.7.3/html5shiv.min.js"></script>
@@ -32,7 +33,7 @@
           <img src="{{site.logo | relative_url}}" alt="Logo" />
         {% endif %}
 
-        <p>{{ site.description_long | default: site.github.project_tagline }}</p>
+        <p>{{ site.description_long }}</p>
 
         {% if site.github.is_project_page %}
         <p class="view"><a href="{{ site.github.repository_url }}">Vis kilden på min private git <small>{{ site.github.repository_nwo }}</small></a></p>
@@ -73,5 +74,28 @@
       ga('send', 'pageview');
     </script>
     {% endif %}
+
+    {% if page.math  %}
+    <script>
+      MathJax = {
+        tex: {
+          packages: {
+            '[+]': ['mhchem', 'ams']
+          },
+          inlineMath: [              // start/end delimiter pairs for in-line math
+            ['$','$'],
+            ['\\(', '\\)']
+          ],
+          displayMath: [             // start/end delimiter pairs for display math
+            ['$$', '$$'],
+            ['\\[', '\\]']
+          ],
+          tags: 'ams',
+          processRefs: true,
+        }
+      };
+    </script>
+    <script id="MathJax-script" async src="https://cdn.jsdelivr.net/npm/mathjax@3/es5/tex-chtml.js"></script>
+    {% endif %}
   </body>
 </html>
diff --git a/_posts/2020-08-25-lecture-testing.md b/_posts/2020-08-25-lecture-testing.md
index ac1acce..b2f595a 100644
--- a/_posts/2020-08-25-lecture-testing.md
+++ b/_posts/2020-08-25-lecture-testing.md
@@ -3,6 +3,27 @@ layout: lecture
 title: "Testing of lecture notes"
 description: Filer for prosjekter og stæsj på NTNU.
 categories: ntnu lectures tdt4120
+math: true
 ---
 
-Lecture notes is fun
\ No newline at end of file
+Lecture notes is fun \eqref{test}.
+
+\begin{align}
+    E &= mc^2 \label{test} \\\\\
+      &= mv^s \nonumber
+\end{align}
+
+$\omega = 2 \pi f$
+
+In equation \eqref{eq:sample}, we find the value of an
+interesting integral:
+
+\begin{equation}
+  \int_0^\infty \frac{x^3}{e^x-1}\,dx = \frac{\pi^4}{15}
+  \label{eq:sample}
+\end{equation}
+
+\begin{bmatrix}
+  a & b \\\\\
+  c & c
+\end{bmatrix}
\ No newline at end of file
diff --git a/files/ntnu/ntnu.md b/files/ntnu/ntnu.md
index f6a74ab..fecb951 100644
--- a/files/ntnu/ntnu.md
+++ b/files/ntnu/ntnu.md
@@ -33,4 +33,3 @@ Vår 2019
 	- [Formelark](/files/ntnu/v19/tma4105/formelark.pdf)
 * TDT4102 - Prosedyre- og objektorientert programmering
 	- Øvinger på [git](https://git.glados.no/oyvindskaaden/TDT4102-Ovinger)
-