\[ \int \frac {\text {csch}(c+d x)}{a+b \tanh ^3(c+d x)} \, dx \]
Optimal antiderivative \[ i \mathit {Unintegrable} \left (-\frac {i \mathrm {csch}\left (d x +c \right )}{a +b \left (\tanh ^{3}\left (d x +c \right )\right )}, x\right ) \]
command
integrate(csch(d*x+c)/(a+b*tanh(d*x+c)^3),x, algorithm="fricas")
Fricas 1.3.8 (sbcl 2.2.11.debian) via sagemath 9.6 output
\[ \text {output too large to display} \]
Fricas 1.3.7 via sagemath 9.3 output \[ \text {Timed out} \]