Uhh no one really knows so yeh. 2006 was ridiculously easy, so they had to resort to stuff like taking marks off for parabolas which weren't quite aesthetically pleasing enough, or intercepts which weren't labelled in coordinate form. Meanwhile 2007 was supposedly quite difficult (overly difficult actually?) so my assumption is that they'll probably opt for difficult exams again (although I doubt more difficult than 2007) to prevent a repeat of '06 since that did no one any favours really, and a larger spread makes things easier for VCAA when allocating study scores. So yes, somewhere in between '06 and '07 in terms of difficulty. Just go try those yourself I guess since I can't recall every single one of those companies