What is the solution to the problem of being unable to study before exams, accompanied by feelings of fear and an inability to answer questions despite a good understanding of the material?

Languor and boredom with studying may be due to self-exertion. One should be moderate in diligence and perseverance, and set a study schedule that includes a break. If the cause is the evil eye or sorcery, one can seek help through legitimate ruqyah, while being cautious of charlatans and soothsayers.