tex-math build warnings

Builds complain with the following errors. Can we:

1. Manually fix them
2. (Time-permitting) update the ingestion code to handle them better? (This is less important and I don't want it to be a blocker, but maybe some of these are easy)

```text
WARNING Unknown TeX-math command: \sim9k
WARNING Unknown TeX-math command: \cal
WARNING Unknown TeX-math command: \#Turki
WARNING Unknown TeX-math command: \Pr
WARNING Unknown TeX-math command: \rm{P}
WARNING Unknown TeX-math command: \rm{Y}
WARNING Unknown TeX-math command: \text{Petersen}
WARNING Unknown TeX-math command: \text{CAPTURE}
WARNING Unknown TeX-math command: \text{Schnabel}
```