Question:
May one pray to do well on his final exams even after the exams are over, as there is still some professorial leeway and subjectivity in grading? Or is this a vain prayer?
Answer:
It is still possible to daven for something like that since it is not dependant on something that physically already happened. In Shemona Esrei we daven for "chain" (favor), that we should find favor in other people’s eyes, This would be included in that since it depends on the marker's will.