Extend edits question

Hi All, is there a way (and if so is there a shortcut) to extend edit a selection of clips (in this case audio) on either side by 'X' amount of frames. My thought process is if I can extend all of these with a shortcut and then use a toggle audio fades shortcut I have it will speed dragging them out a few frames up so damn much! Thanks.

Select the edit point.
Type in + or - depending on which direction you're trimming in, followed by number of frames to trim (or seconds, minutes).
Hit enter, done.

Not sure there is a command to trim head and tail simultaneously.

Once targets selected...
Maybe
+ number of frames to extend duration one way , reverse clips , do it again x number of frame for the other way , reverse again ... done each way

Almost...
Select clips -> CTRL D -> + or - then frame number needed followed by your own audio fade toggle shortcut.