This is a challenge for typographers (which I am not). Can you tell apart our rendering (amateurish) from LuaLaTeX's?
I should move on to extensible operators (like brackets, overset arrows, etc) but I'm laaaazy
@abs And you are right.
@otini That's really quite good, but the size and alignment of the sub and superscripts still needs work. (Yours on the left, TeX on the right)
@otini spacing before the word "text"
@axiom Ah yes, I forgot to say: I don't yet work on integration of math into text. Once I have more math operators implemented I will tackle the issue (as well as line breaking inside math).
Now, save for the size of big operators in display style, I think they are almost identical.