I give you very easy way for this:
If you want to add address in crystal report as a Add1, Add2, Add3.
You can take a three Text object as a txtAdd1, txtAdd2, txtAdd3.
you can manage this for your requirement. It's a very easy compare of formula. If you use formula it's so difficult to modify it's such as bold text, underline, alignment etc.
if you fill your address in differences three text object you can work easy ant its easy to mentaine if future uses.
After that desion wise you.
You can try different way and you desided which is easy to use.