You could store your dates in a text field with returns separating each entry, but chances are that you'll be much happier with your data base if you store this data in a related table where each entry makes up one record. You can then display this data in a portal to show all the entries for a given contract.
Given your example:
Album 1 1/1/2010 Contract 1
Album 2 1/1/2010 Contract 1
Album 3 3/2/2010 Contract 2
Album 4 4/1/2011 Contract 2
Album 5 5/1/2013 Contract 2
I'd put at least three fields in this table: Album ID, ExpDate and Contract ID
You'll even be able to link your album records to this new table by AlbumID and your contract records to this table by ContractID.