Quote Originally Posted by translations.nm.ru
My version (which may or may not work, depending on the context):

Provided that an agreament is achieved regarding the financial terms, calculations will be made in the near future and the rest of agreed-upon variants/versions/possibilites will be described.

You should not use "would", since the Russian sounds very positive on that point. If an agreement is reached, the calculations will be made.
I'd probably go with this one as well (it's agreement though ); you can use either "reached" or "achieved" (personally, I'd use reached).
It also sounds better and more fluent to put the subphrase at the beginning of the sentence - not wrong to leave it where it was in the Russian version, just a bit less heavy .

So, my version:
Provided that an agreement is reached regarding the financial terms, calculations will be made in the near future and the rest of (the) agreed-upon variants/versions/possibilites will be described.