Need link that explains raising exponent to powers and exponents in fractions ect.

I am taking a placement test tomorrow, and it's been years since I did any math. I forgot what you do with exponents.


for example... do you add or multiply for (x^6)^3 would it be 6+3 or 6 times 3.

and I seem to remember that you subtract when dividing/using fractins that have exponents. please explain the various rules or link me :3 thank you.

Here are few links which can explain this to you:
1) http://www.saskschools.ca/curr_content/m…
2) http://www.slideshare.net/Josephil/laws-…
3) http://www.algebra.com/algebra/homework/…

Hope this helped! :)