According to the information on this page I was going to add Analysis Services to our instance of SQL Server 2012 Express Advanced:
http://msdn.microsoft.com/en-us/library/ms144275.aspx
We ran the SQL Server installer and selected "Add features to an existing instance of SQL Server". On the Feature Selection screen we only noticed the following:
Instance Features
Database Engine Services
SQL Server Replication
Full Text.....
Reporting Services
Shared Features
SQL Server Data Tools
Documentation Components
Management Tools - Basic
SQL Client Connectivity SDK
Redistributable Features
The Analysis Services feature was not in this list of choices.
All help will be appreciated.