Q: Is it possible to export term sets from the term store in SharePoint 2013?

 

Without any add-ons, it is not possible to export term sets directly from the term store in any version of SharePoint.  
However, by using PowerShell, term sets can be exported.  This is valuable for migrating term sets between different SharePoint environments. Click here to read an MSDN article describing how to user PowerShell to export term sets from the term store.  
As a general best practice, once a taxonomy is imported into the term store, any day to day management of the taxonomy should be done in the term store.  you should not plan to export the taxonomy from the term store for purposes of making edits.