I will do the first, you do the second.

The first step is to write this thing out as a single fraction:

The next step is to work out the parenthesis. There is only one set of parenthesis, in the denominator:

Now write the denominator as negative powers of the numerator:

Now combine powers of like bases:

Now go to work on the constants. You are expected to know (or somehow figure out) that and :

Now put negative exponents in a denominator:

And simplify:

You do the second one and post your solution. We'll check it.

-Dan