This is an English forum. Please use correct English spellings. It's not
u. It's
you.
A. Both are incorrect. It's
after/when he was done with homework.
after and
when mean almost the same thing in this context.
B. Again, both mean about the same.
bring to is a very direct way of saying it. It can sound more urgent and more important.
bring by is a more casual and less urgent, almost suggesting
when you are in the vicinity.
bring to is more common in the neutral case, however.
Please bring it to my office sometime today.
Bring it to my office immediately. It has to go out as soon as possible.
No hurry. Bring it by my office when you get a spare moment.
CJ