# Laurent series and partial fractions

## Homework Statement

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

## 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

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