I have a list of functions which looks like this:

RR:={F[l, m-2, n-1], F[l, m+2, n], F[l, m+2, n-1], F[l-1, m+1, n-2], ...}

I wish to remove the first and second arguments from the functions, so only leaving the third argument containing the n's. I then wish to group these remaining terms together to shorten the list. i.e.

RR:={F[n-1], F[n], F[n-2]}

I have used the 'subsop' command with 1 and 2 specified as NULL in a loop, but I was wondering if there is a better way to do it? I like to avoid loops where possible and use some inbuilt Maple magic to make it tidier and (usually) more efficient.

-Yeti