In column A I have a load of name that look like this
[John Smith]
I still want them in A but the [] removed...
If [John Smith] is in cell A1, then use this formula to do what you want:
=SUBSTITUTE(SUBSTITUTE(A1, "[", ""), "]", "")
The inner SUBSTITUTE replaces all instances of "[" with "" and returns a new string, then the other SUBSTITUTE replaces all instances of "]" with "" and returns the final result.
Replace [ with nothing, then ] with nothing.
Another option:
=MID(A1,2,LEN(A1)-2)
Or this (for fun):
=RIGHT(LEFT(A1,LEN(A1)-1),LEN(LEFT(A1,LEN(A1)-1))-1)
来源：https://stackoverflow.com/questions/17652349/how-to-delete-certain-characters-in-a-excel-2010-cell