m

$f(t)$

$\frac{1}{2}$

$-\sqrt{2}\cdot \frac{12-{(e^t-e^{-t})}^2}{{(e^t+e^{-t})}^4}$

$\frac{1}{3}$

$-\frac{2\sqrt{2}}{3}\cdot \frac{20-{(e^t-e^{-t})}^2}{{(e^t+e^{-t})}^4}$

$\frac{1}{4}$

$-\frac{2\sqrt{2}}{2}\cdot \frac{14-{(e^t-e^{-t})}^2}{{(e^t+e^{-t})}^4}$

$\frac{1}{5}$

$-\frac{2\sqrt{2}}{5}\cdot \frac{36-{(e^t-e^{-t})}^2}{{(e^t+e^{-t})}^4}$

$\frac{1}{6}$

$-\frac{\sqrt{2}}{3}\cdot \frac{44-{(e^t-e^{-t})}^2}{{(e^t+e^{-t})}^4}$

$\frac{1}{7}$

$-\frac{2\sqrt{2}}{7}\cdot \frac{52-{(e^t-e^{-t})}^2}{{(e^t+e^{-t})}^4}$

$\frac{1}{8}$

$-\frac{\sqrt{2}}{4}\cdot \frac{60-{(e^t-e^{-t})}^2}{{(e^t+e^{-t})}^4}$

$\frac{1}{9}$

$-\frac{2\sqrt{2}}{9}\cdot \frac{68-{(e^t-e^{-t})}^2}{{(e^t+e^{-t})}^4}$