Question

Find the derivative of the functions

${z}^{2} - 1 \div {z + 1}^{2}$
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Answer 1

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$\frac{ {z}^{2} - 1}{z + {1}^{2} } \\ \\ \frac{ {z}^{2} - {1}^{2} }{z + 1} \\ \\ \frac{(z + 1)(z - 1)}{z + 1} \\ \\ z - 1$

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