(adsbygoogle = window.adsbygoogle || []).push({}); 1. The problem statement, all variables and given/known data

[tex] \frac{d^2}{dz^2} [ (z^2) \(\frac{-(z-\frac{1}{z})^2}{20+8(z+\frac{1}{z})} \frac{1}{iz}] [/tex]

2. Relevant equations

3. The attempt at a solution

I have to do this by hand no calculators, CAS, or tables. I started by just expanding things and using the quotient rule, but it got real messy real fast. Any ideas?

1. The problem statement, all variables and given/known data

2. Relevant equations

3. The attempt at a solution

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# Homework Help: Find the derivative by hand.

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