Thank you so much for the information. However, being new to this whole thing and the terminology, I'm afraid I'm not getting it to work.
I added three fields to my form to allow them to type in three different addresses. How do I put these in the fx so that they work? I get an error. Not knowing the language or how to put in the expression means I'm stuck or that this is impossible to occomplish. Can I put up to three addresses in there?