$$z^{3}eos(\frac{1}{z+2})$$
$\frac{eosz^{3}}{z+2}$
$$\frac{z^{3}}{z+2}eos$$
$$\frac{z^{3}e}{z+2}os$$
$$\frac{z^{3}eo}{z+2}s$$
$$\frac{z^{3}eos}{z+2}$$
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$2e\times \left(\frac{z}{z+2}\right)^{2}os\left(z+3\right)$
