Question: How to add nonitalic functions?

How do I add my own functions to the nonitalic list like sin, ln etc? I want eg. Col(A) and span{...} to not be in italic automatically.

I've seen in the typesetting rules, and tried adding them to dependency suppresion, but that doesn't accomplish anything :p

And #2: When I write {....}, I always get "Error, unable to match delimiters" on the last "}" -- how do I remove that message?

 

Thanks!

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