Primitive of x by Hyperbolic Cosecant of a x

Theorem
where $B_{2 n}$ denotes the $2 n$th Bernoulli number.

Also see

 * Primitive of $x \sinh a x$
 * Primitive of $x \cosh a x$
 * Primitive of $x \tanh a x$
 * Primitive of $x \coth a x$
 * Primitive of $x \sech a x$