67.5 Problem number 5

\[ \int \frac {1}{\left (b \tan ^2(e+f x)\right )^{3/2}} \, dx \]

Optimal antiderivative \[ -\frac {\cot \left (f x +e \right )}{2 b f \sqrt {b \left (\tan ^{2}\left (f x +e \right )\right )}}-\frac {\ln \left (\sin \left (f x +e \right )\right ) \tan \left (f x +e \right )}{b f \sqrt {b \left (\tan ^{2}\left (f x +e \right )\right )}} \]

command

integrate(1/(b*tan(f*x+e)^2)^(3/2),x, algorithm="giac")

Giac 1.9.0-11 via sagemath 9.6 output

\[ -\frac {\frac {4 \, \log \left (\frac {{\left | -\cos \left (f x + e\right ) + 1 \right |}}{{\left | \cos \left (f x + e\right ) + 1 \right |}}\right )}{\sqrt {b} \mathrm {sgn}\left (\tan \left (f x + e\right )\right )} - \frac {8 \, \log \left ({\left | -\frac {\cos \left (f x + e\right ) - 1}{\cos \left (f x + e\right ) + 1} + 1 \right |}\right )}{\sqrt {b} \mathrm {sgn}\left (\tan \left (f x + e\right )\right )} - \frac {{\left (\sqrt {b} + \frac {4 \, \sqrt {b} {\left (\cos \left (f x + e\right ) - 1\right )}}{\cos \left (f x + e\right ) + 1}\right )} {\left (\cos \left (f x + e\right ) + 1\right )}}{b {\left (\cos \left (f x + e\right ) - 1\right )} \mathrm {sgn}\left (\tan \left (f x + e\right )\right )} - \frac {\cos \left (f x + e\right ) - 1}{\sqrt {b} {\left (\cos \left (f x + e\right ) + 1\right )} \mathrm {sgn}\left (\tan \left (f x + e\right )\right )}}{8 \, b f} \]

Giac 1.7.0 via sagemath 9.3 output

\[ \text {Exception raised: NotImplementedError} \]________________________________________________________________________________________