@WeiZhong: It seems that at most two math keywords can be entered, is that correct?

@MartinR yes, above 2 is too expensive and inefficient at this stage.

@WeiZhong Actually it is currently impossible to add any math expression containing a comma. $\max(a, b)$ is a simple example demonstrating the problem. Is there any way to avoid the auto-transformation?

When I try searching for \max(a;b), the results include posts with commas. But this is a rather cumbersome workaround. (I'd guess that other things could be used instead of semicolon, too.)

@MartinR @MartinSleziak Thanks for reporting this issue. Indeed it is a newly introduced bug, I have just fixed it. Please refresh your browser page and test it again.

The comma issue is exactly the same bug you mentioned earlier (the thin space issue).

@WeiZhong Looks good!

Great! This is the first time i edit my code directly and fix a bug online... my workstation is not available at this point..

the next a few days i will take a flight and get busy traveling and may not response promptly. but do leave message here if anything goes wrong.