This answer to How to include equations in-line with text within the cell of a table in Keynote? is quite helpful. I noticed that \text{} is interpreted as boldface, and I had to find something else to get "normal" looking text within an equation, whereas in MathJax that we use here in Stack Exchange \text{} produces "normal" text within an equation.
It seems that \mathtt{} and \tt{} produce "normal" looking text while \texttt{} and \text{}produce boldface font.
Question: When we start a recent version of Keynote or Pages, exactly what language is used to generate equations? Is it MathJax or Tex or LaTex or MathML or some mix? Is there a documentation page where I can find reliable information on how to format complicated equations with various features like matrices, aligned equal signs for several equations appearing in multiple lines, and other goodies?
Secondary question: Are there options for changing which language is used, or is it hard-coded?
Right now I only know Mathematics SE Meta's MathJax basic tutorial and quick reference and so far I've simply been lucky that most of what I do in MathJax seems to work in Notes and Pages.
