Hi Hilary, I assume you meant calculated value in the version of InfoPath I have? as I could not find expression box in it. If that is the case, the caculated value field does not honor the line breaks from the textbox.
I ended up using the Rich Text Box, although it does not work when I publish it as a web part in SharePoint, it actually works if I start off everything with a list form and as long as it is opened up in its own new newifs.aspx page...which is strange.