\[ \int \frac {\sqrt {b x^2+c x^4}}{x^{13/2}} \, dx \]
Optimal antiderivative \[ -\frac {4 c^{\frac {5}{2}} x^{\frac {3}{2}} \left (c \,x^{2}+b \right )}{15 b^{2} \left (\sqrt {b}+x \sqrt {c}\right ) \sqrt {c \,x^{4}+b \,x^{2}}}-\frac {2 \sqrt {c \,x^{4}+b \,x^{2}}}{9 x^{\frac {11}{2}}}-\frac {4 c \sqrt {c \,x^{4}+b \,x^{2}}}{45 b \,x^{\frac {7}{2}}}+\frac {4 c^{2} \sqrt {c \,x^{4}+b \,x^{2}}}{15 b^{2} x^{\frac {3}{2}}}+\frac {4 c^{\frac {9}{4}} x \sqrt {\frac {\cos \left (4 \arctan \left (\frac {c^{\frac {1}{4}} \sqrt {x}}{b^{\frac {1}{4}}}\right )\right )}{2}+\frac {1}{2}}\, \EllipticE \left (\sin \left (2 \arctan \left (\frac {c^{\frac {1}{4}} \sqrt {x}}{b^{\frac {1}{4}}}\right )\right ), \frac {\sqrt {2}}{2}\right ) \left (\sqrt {b}+x \sqrt {c}\right ) \sqrt {\frac {c \,x^{2}+b}{\left (\sqrt {b}+x \sqrt {c}\right )^{2}}}}{15 \cos \left (2 \arctan \left (\frac {c^{\frac {1}{4}} \sqrt {x}}{b^{\frac {1}{4}}}\right )\right ) b^{\frac {7}{4}} \sqrt {c \,x^{4}+b \,x^{2}}}-\frac {2 c^{\frac {9}{4}} x \sqrt {\frac {\cos \left (4 \arctan \left (\frac {c^{\frac {1}{4}} \sqrt {x}}{b^{\frac {1}{4}}}\right )\right )}{2}+\frac {1}{2}}\, \EllipticF \left (\sin \left (2 \arctan \left (\frac {c^{\frac {1}{4}} \sqrt {x}}{b^{\frac {1}{4}}}\right )\right ), \frac {\sqrt {2}}{2}\right ) \left (\sqrt {b}+x \sqrt {c}\right ) \sqrt {\frac {c \,x^{2}+b}{\left (\sqrt {b}+x \sqrt {c}\right )^{2}}}}{15 \cos \left (2 \arctan \left (\frac {c^{\frac {1}{4}} \sqrt {x}}{b^{\frac {1}{4}}}\right )\right ) b^{\frac {7}{4}} \sqrt {c \,x^{4}+b \,x^{2}}} \]
command
integrate((c*x^4+b*x^2)^(1/2)/x^(13/2),x, algorithm="fricas")
Fricas 1.3.8 (sbcl 2.2.11.debian) via sagemath 9.6 output
\[ \frac {2 \, {\left (6 \, c^{\frac {5}{2}} x^{6} {\rm weierstrassZeta}\left (-\frac {4 \, b}{c}, 0, {\rm weierstrassPInverse}\left (-\frac {4 \, b}{c}, 0, x\right )\right ) + {\left (6 \, c^{2} x^{4} - 2 \, b c x^{2} - 5 \, b^{2}\right )} \sqrt {c x^{4} + b x^{2}} \sqrt {x}\right )}}{45 \, b^{2} x^{6}} \]
Fricas 1.3.7 via sagemath 9.3 output
\[ {\rm integral}\left (\frac {\sqrt {c x^{4} + b x^{2}}}{x^{\frac {13}{2}}}, x\right ) \]