Which includes most of the cuts. In many areas, the coke going around is cut to hell and back - sometimes leading people to choose crack because it's comparatively purer (because it's somewhat harder to convincingly cut, and the cuts tend to get removed in the preparation process - of course, it doesn't remove all cuts, and can introduce salt/baking soda).
I would imagine you are right and there are several methods you could use to convert cocaine into it's freebase form but I definitely do not want to see any details of drug synthesis in this thread
Infact seeing as the initial question was a simple one which has been answered, I'm going to close this. Pm me if you have any queries