Составить 3 предложения про трудные школьные предметы и 3 про лёгкий

My favorite subjects at school are Russian, Russian literature, and physical education. They are my favorites because I know them well and understand them perfectly. That's why they are easy for me.

For me, very complex subjects are mathematics, physics, computer science. For me, they are very difficult because I do not understand them, and always drag on with homework. I try to understand these complex school subjects.