I think you should have posted this in an excel newsgroup.

Anyhoo, try the concatenate function which joins several text strings into
one text string.
Syntax

CONCATENATE (text1,text2,...)

Text1, text2, ...    are 1 to 30 text items to be joined into a single text
item. The text items can be text strings, numbers, or single-cell
references.

Remarks

The "&" operator can be used instead of CONCATENATE to join text items.

eg. =A1&" / "&A2

I have a 2 strings of characters in 2 spreadsheet cells and I want to
cobine them into 1 cell.

cell 1 = "Geometry"
cell 2 = "Algebra"

I want cell 3 = "Geometry / Algebra"

Can anyone help?