Add math from gitlab help

README.md

+This math is inline $`a^2+b^2=c^2`$.
+
+This is on a separate line
+```math
+a^2+b^2=c^2
+```
+
+
 This repository consists of a collection of python examples intended as an
 introduction on the use of python in data analysis, especially for the
 advanced laboratories in physics at the University of Freiburg. In previous