3 APL (Dyalog Unicode) [APL (Dyalog Unicode)](https://www.dyalog.com/), 17 [bytes](https://codegolf.meta.stackexchange.com/a/9429/43319 "When can APL characters be counted as 1 byte each?")^SBCS^
2 W [W](https://github.com/A-ee/w) [`d`](https://codegolf.meta.stackexchange.com/questions/14337/command-line-flags-on-front-ends/14339#14339), 11 [bytes](https://github.com/A-ee/w/wiki/Code-Page)
2 Stax [Stax](https://github.com/tomtheisen/stax), 9 [bytes](https://github.com/tomtheisen/stax/blob/master/docs/packed.md#packed-stax)
MathJax or KaTeX? 11 3
4 I had a look at KaTeX and I'm convinced that it is *plenty* powerful for our needs. The improved rendering speed is nice too.