Ответ:
Dear Emily,
Thank you for your letter. Sorri i haven't write earlier, but i was really busy with my school. I absolutely agree with you, because Maths is so difficult for me.
As for me, I don't like exact sciences, because i don't understand this subjects. In general, to improve my English, I prefer to watch movies in the original, also read books in English and learn new words. As for me, I want to start learning German, I think that this language is very beautiful and popular.
Well, i'd better go now, as i have to do my homework.
Write back soon.
Best wishes,
Your name