
10.8.8 Series with complex terms
Problem:
Expand \( f(z) \) into Laurent series (Taylor) into the given ring or neighborhood of the given point (in this case indicate the domain of convergence of the obtained series).
\[
f(z)=\frac{1}{(z+1)(z-3)^{2}}, \quad 1<|z|<3 .
\]