Elementary problem 11 - mathematical notation rendering is messed up under Google Chrome

![2023-11-04_11-23](https://github.com/adrianN/adrianN.github.io/assets/76531574/dcccf40b-953a-45ba-a196-477c6a3f7a4b)

This is happenning under the latest version of Chrome under Linux. Firefox seems unaffected.