Your use of Stack Overflow’s Products and Services, including the Stack Overflow Network, is subject to these policies and terms.
Click on the Diplomacy icon (top right) then on the Diplomacy Overview button - it should show on here (on left hand side) if you have any Research Agreements in place.
I dont think there is any way to see other civs Research Agreements, only your own.
The diplomacy overview should have it. Unfortunately, it lists things in a non-intuitive manner (it lists the turn the agreement started on, I believe?) so once you know the start date, you have to calculate the intervening years (and thus the end date) on your own.