[jcagalawan]

It's the same one as implemented in MS Word (and PowerPoint, OneNote), this standard was written by an engineer who is on the Math in Office team and maintains a blog [1]. It's the best WYSIWYG equation editor I've used so far. LaTeX has its place, but it's hard to convince non-coders to use it and I'm glad it has the editor. I stumbled into this specification trying to format a constrained optimization problem and found the equation array format to be fairly straightforward similar to the bmatrix environment in LaTeX and thought it was neat that Unicode could represent so much math.

[1] https://blogs.msdn.microsoft.com/murrays/

[ygra]

It should also be noted that Murray Sargent didn't just do whatever he thought of. He has done at least one math layout engine before, consulted with Donald Knuth regarding TeX and some choices that were made back then and a lot of the differences between this and TeX have a fairly sensible reason.

For me, I'm able to use both LaTeX and this, but the main points that make this more convenient to me is that it relies less on characters that are present in awkward locations in many keyboard layouts (such as {}) and the equivalent formula is often much shorter due to somewhat more advanced tokenizing (of course, specific to math input, as the format doesn't have the same constraints as a general-purpose programming and markup language), e.g. x^12 works for x to the power of 12 instead of resulting in x^1 2.