Is there a simpler way to do this?

I’m not sure I understand the question.

I’m going to guess that it’s about struggling to learn TeX syntax. AsciiMath (https://asciimath.org/) might be easier to learn (though it is less expressive); see also https://docs.mathjax.org/en/latest/basic/mathematics.html#asciimath-input.

There are also many tools out there that help with authoring formula content, most of which can export to one of the formats that MathJax can render (i.e., TeX, asciimath or MathML).

But such complex authoring tooling is out of scope for this plugin.