diff --git a/src/presentation/main.md b/src/presentation/main.md
index c58bbe2..d172d44 100644
--- a/src/presentation/main.md
+++ b/src/presentation/main.md
@@ -6,6 +6,10 @@
---
### Die harmonische Schwingung
+
+$$ F = -D * s $$
+$$ \frac{d v}{dt} = \frac{F}{m} $$
+
diff --git a/src/presentation/main.md b/src/presentation/main.md
index c58bbe2..d172d44 100644
--- a/src/presentation/main.md
+++ b/src/presentation/main.md
@@ -6,6 +6,10 @@
---
### Die harmonische Schwingung
+
+$$ F = -D * s $$
+$$ \frac{d v}{dt} = \frac{F}{m} $$
+
diff --git a/src/template_presentation.html b/src/template_presentation.html
index d0352b0..f178ca6 100644
--- a/src/template_presentation.html
+++ b/src/template_presentation.html
@@ -9,6 +9,16 @@
+
+
+
+
+