It should be
\[ \frac{1}{z-1} - \frac{2}{z - 2} \]
so yes you're right... and now yes, you want to expand these two terms around those two points. For example, for |z|<1, we can rewrite that as
\[ \frac{-1}{1 - z} + \frac{1}{1 - z/2} = -\sum_{n=0}^\infty z^n+ \sum_{k=0}^\infty (\frac{z}{2})^k \]
you can simplify that if you'd like, bringing them both under the same summation sign and all that stuff, but that's the idea. Since |z|<1, these series converge. For |z-2|<1, they don't necessarily converge, so you have to expand them about the point z = 2 for the second part, but the same deal applies.