Need help translating this sentence

How do I say the following in Japanese?

Since I will be going to (place) next week, I will not be able to attend next week's class. Hence, I would like to know if you can keep a copy of the notes and the answer keys to the exercises this week?

Since I will be going to (place) next week,
(place)に行くので
(place)ni iku node

I will not be able to attend next week's class.
来週は授業に出られません。
raishu ha jugyo ni deraremasen.

Hence,
そこで、
soko de

I would like to know if you can keep a copy of the notes and the answer keys to the exercises this week?
その週のノートと練習問題の答えの大事なところをとっておいて、いただけないでしょうか。
sono shyu no no-to to renshyu mondai no kotae no daiji na tokoro wo totte oite itadakenaide shoka.

Thank you very much for the help. :D