$4 \operatorname{cosech} 2 x \tanh 2 x$

$4 \operatorname{sech} 2 x \operatorname{coth} 2 x$

$4 \operatorname{sech} 2 x \tanh 2 x$

$4 \cosh 2 x(\operatorname{cosech} 2 x)^2$

$\frac{336}{625}$

$-\frac{7}{25}$

$\frac{24}{25}$

$-\frac{336}{625}$

1

$\frac{1}{2}$

$\frac{1}{4}$

$\frac{1}{8}$

$\sqrt{10-2 \sqrt{5}}$

$\sqrt{10+2 \sqrt{5}}$

$\sqrt{5}-1$

$\sqrt{5}+1$