## Laurent Series for f(z)=(1+2z)/(z^2+z^3)

Would anyone be willing to check and comment on my work for finding the Laurent series of

$$f(z)=\frac{1+2z}{z^2+z^3}$$ ?

Page 1 - http://img23.imageshack.us/img23/7172/i0001.jpg

Page 2 - http://img5.imageshack.us/img5/2140/i0002.jpg

Page 3 - http://img15.imageshack.us/img15/2753/i0003.jpg

I also displayed the pages below.

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