I was only going to bring calculators in the exam. However, while I was doing HSC past papers, I noticed that some questions required a protractor.. So, maybe it's a good idea to bring one just in case.
So far, no need for set squares and compass set.
Just because you drop out of school, doesn't mean you're going to be a billionaire, there's no guarantee.
Taking HSC, going to University.. I think.. It just gives you a better chance at getting jobs (and not failing in life)? ('Cause you have qualifications etc)
From what I know, 2U doesn't have a formula sheet..
But General Mathematics does > http://www.boardofstudies.nsw.edu.au/syllabus_hsc/pdf_doc/maths_gen_formulae.pdf