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