One of my students tried to post this:

"@@@lim(((x^2+1)/(5-x)),x,5)=@@@no limit"

While not technically good notation, it doesn't seem that it should produce a syntax error in the filter. But here's what I get:

@@lim(((x^2+1)/(5-x)),x,5)=@@no limit

Any ideas?

--Rudy