Hi,
I am a very beginner to smath, as I wanted to try an example with atan I didn't success after googling hardly I found an example which loaded (mwall) atan.
It's not well indicated in tutorials the way to do it because they say to find the function which doesn't exist in new smath I downloaded.
Thanks smath studio is really excellent, pity I don't know yet how to use it properly...
Kind regards
Henri

Please attach a .sm file where you indicate what you tried and what result you expect.