exact (something) from (one)
To obtain something from someone through authority, force, or some other means of coercion. I doubt you'll be able to exact the entire amount from her because she doesn't make enough money to pay you back right now.
to be (more) exact
To be more accurate; to provide better or more correct details. You'll need to pay nearly $500 for various entry visas to get into the country—$485, to be exact. It seems like the political party is finally starting to gain some amount of clout in parliament, or, to be more exact, they have become less marginalized and disliked.