What you are actually after is a
MID() function that optionally allows two arguments, resulting in returning the text from the position of the supplied second argument, through to the end of the string.
MID() function doesn't allow for that. So a substitute formula needs to be crafted.
Assuming the text is in
A1, the simplest formula is:
The other way of creating a substitute formula is by using
RIGHT(), like cybernetic.nomad did in this answer. However, the best way to do so is the following:
Whilst, technically speaking the second formula is the more "accurate" one (it calculates and returns precisely the correct number of rightmost characters, as opposed to the first formula that tries to grab more characters than what actually exist), the first formula contains two less operaters (yeah, faster!) and is shorter (gotta save on those expensive harddisk/SD bytes ;))