like those used in MS word Equation editor:

superscript and subscript


other mathematical notations

Wrote

like those used in MS word Equation editor:
superscript and subscript

What are you missing wrt Smath ? ... Examples.
MS Word is a freak for publishing useless papers,
that aren't executable by any CAS.
A good example of freak representation is the Dirac ket & bra
You have to be more than Grand Savant to make it work Fourier !

Yes, I keep running into roadblocks in writing SMath versions of common engineering calcs because many, many engineering references use a wide variety of variable formatting not supported by SMath. Just today, I ran into problems replicating a seismic design formula from ASCE 7-22 here in the US, which uses a tilde over different letters and an overline or macron over different letters. Some work in SMath, like Ṽ and a̅, but not W̃ and W̅. I can replace the impossible notation with something SMath can generate, but then I have to explain what it is since it's not the notation in our national design standard here. See example screenshot below.
(In the screenshot, I say that the combining tilde works, but it worked with the letter V, but not other letters.) More options in variable name formatting like what netsonicyxf requested would be really nice, particularly if the intent for SMath is for it to someday be a real competitor with Mathcad.

Greetings,

Wrote

Some work in SMath, like Ṽ and a̅, but not W̃ and W̅.

I do not have this issue as I changed the default font of the SMath math from Courier to Arial. This has its own set of issues though (i.e., Arial is not monospace).

You will note that the macron does not like the letter "W" in ｢Courier New｣, but behaves better for ｢Courier Std｣ (i.e., half over), while it behaves as expected for other fonts (e.g. Arial). The file to edit would be 'settings.prop' located in ｢...[installfolder]...\SMath Studio\representation\｣. This is the file that controls the size/color/font for math objects. It is saved locally to your cpu, so take note if you plan on sharing a SMath sheet to others as it will reformat to local math settings.

As an option, you don't have to change all of your math formatting just to accommodate these special mathematical name; take advantage of the special Absolute Variable, it has its own formatting; Change this to a font family that supports accents (I added "Arial" below to illustrate how):

May this be of Good Help;
⚜ Kenny Lemens, P.E. ᵂᴵ

That's good to know, Kenny. I didn't think about some of these symbols working better in some fonts versus others, even different between 2 versions of the same font like Courier.
Thanks!
Jason