Primitive of Square of Hyperbolic Cotangent of a x

Theorem

 * $\ds \int \coth^2 a x \rd x = x - \frac {\coth a x} a + C$

Also see

 * Primitive of $\sinh^2 a x$
 * Primitive of $\cosh^2 a x$
 * Primitive of $\tanh^2 a x$
 * Primitive of $\sech^2 a x$
 * Primitive of $\csch^2 a x$