YOU SAID:

no one cars about what I am doing as long as i get good grades

INTO JAPANESE

良い成績が得られる限り、私は何をしているのか誰にもわかりません。

BACK INTO ENGLISH

As long as you get good grades, no one knows what I am doing.

INTO JAPANESE

あなたが良い成績を得る限り、だれも私がしていることを知りません。

BACK INTO ENGLISH

As long as you get good grades, no one knows what I am doing.