Напишите письмо на английском I feel stressed out because of my school exams

Very often I'm nervous because of school exams. I am trying to learn and remember, but I'm not very good at it. Very hard for me with math. Very easy Russian language and history. I know how to write correctly and without errors. The story is a very interesting subject in which many dates and events. It is very easy for me. Very often I think that ill pass the exams. But then you realize that it's very easy, and the man in your life will be a lot of exams, maybe this one is the easiest. Do not be nervous, I will learn and pass on the fine.