\[ \int \frac {\sqrt {a+b x^2} \left (A+B x^2\right )}{x^{11}} \, dx \]
Optimal antiderivative \[ -\frac {A \left (b \,x^{2}+a \right )^{\frac {3}{2}}}{10 a \,x^{10}}-\frac {b^{4} \left (7 A b -10 B a \right ) \arctanh \left (\frac {\sqrt {b \,x^{2}+a}}{\sqrt {a}}\right )}{256 a^{\frac {9}{2}}}+\frac {\left (7 A b -10 B a \right ) \sqrt {b \,x^{2}+a}}{80 a \,x^{8}}+\frac {b \left (7 A b -10 B a \right ) \sqrt {b \,x^{2}+a}}{480 a^{2} x^{6}}-\frac {b^{2} \left (7 A b -10 B a \right ) \sqrt {b \,x^{2}+a}}{384 a^{3} x^{4}}+\frac {b^{3} \left (7 A b -10 B a \right ) \sqrt {b \,x^{2}+a}}{256 a^{4} x^{2}} \]
command
integrate((B*x**2+A)*(b*x**2+a)**(1/2)/x**11,x)
Sympy 1.10.1 under Python 3.10.4 output
\[ - \frac {A a}{10 \sqrt {b} x^{11} \sqrt {\frac {a}{b x^{2}} + 1}} - \frac {9 A \sqrt {b}}{80 x^{9} \sqrt {\frac {a}{b x^{2}} + 1}} + \frac {A b^{\frac {3}{2}}}{480 a x^{7} \sqrt {\frac {a}{b x^{2}} + 1}} - \frac {7 A b^{\frac {5}{2}}}{1920 a^{2} x^{5} \sqrt {\frac {a}{b x^{2}} + 1}} + \frac {7 A b^{\frac {7}{2}}}{768 a^{3} x^{3} \sqrt {\frac {a}{b x^{2}} + 1}} + \frac {7 A b^{\frac {9}{2}}}{256 a^{4} x \sqrt {\frac {a}{b x^{2}} + 1}} - \frac {7 A b^{5} \operatorname {asinh}{\left (\frac {\sqrt {a}}{\sqrt {b} x} \right )}}{256 a^{\frac {9}{2}}} - \frac {B a}{8 \sqrt {b} x^{9} \sqrt {\frac {a}{b x^{2}} + 1}} - \frac {7 B \sqrt {b}}{48 x^{7} \sqrt {\frac {a}{b x^{2}} + 1}} + \frac {B b^{\frac {3}{2}}}{192 a x^{5} \sqrt {\frac {a}{b x^{2}} + 1}} - \frac {5 B b^{\frac {5}{2}}}{384 a^{2} x^{3} \sqrt {\frac {a}{b x^{2}} + 1}} - \frac {5 B b^{\frac {7}{2}}}{128 a^{3} x \sqrt {\frac {a}{b x^{2}} + 1}} + \frac {5 B b^{4} \operatorname {asinh}{\left (\frac {\sqrt {a}}{\sqrt {b} x} \right )}}{128 a^{\frac {7}{2}}} \]
Sympy 1.8 under Python 3.8.8 output
\[ \text {Timed out} \]________________________________________________________________________________________