Laurent series and partial fractions

[physicsnewb7]

Homework Statement

find the laurent series of sin(2z)/(z^3) in [z]>0

Homework Equations

The Attempt at a Solution

I am completely confused. I can understand some of the examples given on laurent series, like using partial fractions and then finding geometric series. Do I rewrite the denominator as 1-(z^3+1)? This one I'm totally confused on. Please help

 

[Sethric]

You don't need partial fractions here. Think of a way to write the sine function as a series.

 

[Amok]

Always remember that a Laurent series is unique, so if you can find a way to express a function as a power series, then it is the Laurent series.