What will replace math exams in 2020/21 given covid-19?
Here are some examples of how it is done at the University of Copenhagen for the two courses that I have exams in next week.

One course has a written exam: We are given a problem sheet that we write up a solution to and submit to an online portal after a time limit of four hours. We are allowed to use the internet and any other aids we wish, except that we are not allowed to communicate with other people.

Another course has a verbal exam: A verbal exam is performed using Zoom. There is no preparation time.

Both courses were intended to be verbal exams pre-covid-19.