Maybe because it's not yet a problem. You have posted an expression. What do you want to do with it?
Proofread you question before posting, pleeze.
I do npot understand how to do this problem, please help:
4y/y^2-y/y-3
2 answers
Add and simplify
4y/y^2-9 + y/y-3
4y/y^2-9 + y/y-3