list of expressions in derivation table on webpage not listed in order

[bhpayne]

Derivation webpages like https://allofphysics.com/review_derivation/374317/?referrer=github_issue have an HTML table of expressions, with "index" being the left-most column. The index isn't sorted by default, so the naive reader is more likely to be confused by the table.

Figure out how to have the table sorted by index from low-to-high by default.