[HELP] Goddamn levers.

[Fanskapi]

CompleteQuest("PerformLeverTaskCompleted", "levertask"));
PlaySoundAtEntity("", "quest_completed.snt", "Player", 0, false);

Notice the extra ) after "levertask", thats why it says that you need to put an ; there. You actually don't, just delete the ).
Download Notepad++ (or some similiar coding program), it will help you alot.