You may want to review the rules for simplifying exponential expressions first.

Here's a list of the rules covered in those sections, all in one place:

An example is (1)3(a4)(−a6)0(−2b2)2. You need to break it up into pieces. First of all, (1)3 = 1. (This is just arithmetic.) Second, (−a6)0 is the same as (−1a6)0, which is (−1)0(a6)0, or 1a0. Since multiplying by 1 doesn't do anything, this is really the same thing as a0. Finally, (−2b2)2 simplifies to 4b4. (This is the problem in the last paragraph, only with b instead of x.) So altogether we have 1a4a0(4b4). Now, 1 * 4 = 4, and by the first rule a4a0 = a4, so our final answer is 4a4b4. (We can't combine a4 and b4, since a and b are different letters.)

There are two shortcuts you can use. First, anything raised to the 0 power is 1. Second, anything raised to the 1 power is itself.