Simplify each exponent. 'Write the answer in standard form and exponent form.

12^2

(2^8)*(2^-3)

2^15/2^8

4^5+4^2

(3^-3)^2

((2)^4*(2)^5)/(2)^6

4^2-2^3

help....i forget how to do these.
thanks,