diff --git a/notes.md b/notes.md
index 02a1f05..db9f2d0 100644
--- a/notes.md
+++ b/notes.md
@@ -19,10 +19,11 @@
 | 1e-5  | 1e-5  | 499           |
 
 ##
-
+\[
 U = \frac{\Delta p L}{mu} \frac{9}{256} (\sqrt 2 - \frac{1}{1 - \alpha})^2
 L = 2 R_0
 R_0 = 1
 scale = 1e-5
 mu = 1e-3
 \Delta p = 1
+\]