$$\frac{5}{5}\times\frac{21}{51}\times\frac{2\pi}{2\epsilon}$$
$\frac{7\pi }{17ϵ}$
$$1\times \frac{21}{51}\times \frac{2\pi }{2ϵ}$$
$$1\times \frac{7}{17}\times \frac{2\pi }{2ϵ}$$
$$\frac{7}{17}\times \frac{2\pi }{2ϵ}$$
$$\frac{7}{17}\times \frac{\pi }{ϵ}$$
$$\frac{7\pi }{17ϵ}$$
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$-\frac{7\pi }{17ϵ^{2}}$
