Welcome to Planet Teamwork.
For this multi-cache you need to work with a teammate in São Paulo, Brazil to help one another find your respective final locations. Your posted coordinates will take you to a well hidden green test tube and clothes peg hidden in a juniper tree. Inside you will find some coordinates for a spot in São Paulo. Your teammate needs them to find their final location and you need the coordinates they will find.
The Brazilian geocache your teammate will be working through is GC8D0JF
Pocatello and São Paulo have a connection despite being so far from each other. Both cities have a river running through them that starts with a 'P'.
This is part of the challenge. Count the number of letters in the spelling of São Paulo's 'P' river and add it to the last two digits of the latitude and subtract from the last two of the longitude of the coordinates your teammate gave you. It doesn't matter if it is a single or double digit number of letters.
(Nxx°xx.xBB' + AA)
(Wxxx°xx.xBB' - AA)
Pocatello's final is hidden in near a road with a Portuguese name, so that limits it to Alturas court, Belva lane, Latah street, Mar vista drive, Nada lane, or Neva road.
To find your teammate, go to either this cache or its sister and under the 'log' option pick 'Write a note'. You can also look in the 'activity' section of either cache to see if someone else is trying to find a teammate. Once you're in touch you can privately message one another to finish the mission. The difficulty rating is high since establishing a teammate is difficult, especially across a language barrier.
Be careful not to post any clues or answers in the online log or it will have to be removed.
Make sure to return all the containers and clues to where you found them.
Housekeeping
The rules are clear on cooperative caches, this geocache can only be signed and logged by people who visit the final here in Pocatello. Similarly, the cache in São Paulo can only be signed and logged by people who visit the final in São Paulo. If you want to claim both then you'll need to go globe trotting.