\[ \int \frac {x^{13/2}}{\sqrt {b x^2+c x^4}} \, dx \]
Optimal antiderivative \[ -\frac {18 b \,x^{\frac {3}{2}} \sqrt {c \,x^{4}+b \,x^{2}}}{77 c^{2}}+\frac {2 x^{\frac {7}{2}} \sqrt {c \,x^{4}+b \,x^{2}}}{11 c}+\frac {30 b^{2} \sqrt {c \,x^{4}+b \,x^{2}}}{77 c^{3} \sqrt {x}}-\frac {15 b^{\frac {11}{4}} x \sqrt {\frac {\cos \left (4 \arctan \left (\frac {c^{\frac {1}{4}} \sqrt {x}}{b^{\frac {1}{4}}}\right )\right )}{2}+\frac {1}{2}}\, \EllipticF \left (\sin \left (2 \arctan \left (\frac {c^{\frac {1}{4}} \sqrt {x}}{b^{\frac {1}{4}}}\right )\right ), \frac {\sqrt {2}}{2}\right ) \left (\sqrt {b}+x \sqrt {c}\right ) \sqrt {\frac {c \,x^{2}+b}{\left (\sqrt {b}+x \sqrt {c}\right )^{2}}}}{77 \cos \left (2 \arctan \left (\frac {c^{\frac {1}{4}} \sqrt {x}}{b^{\frac {1}{4}}}\right )\right ) c^{\frac {13}{4}} \sqrt {c \,x^{4}+b \,x^{2}}} \]
command
integrate(x^(13/2)/(c*x^4+b*x^2)^(1/2),x, algorithm="fricas")
Fricas 1.3.8 (sbcl 2.2.11.debian) via sagemath 9.6 output
\[ -\frac {2 \, {\left (15 \, b^{3} \sqrt {c} x {\rm weierstrassPInverse}\left (-\frac {4 \, b}{c}, 0, x\right ) - {\left (7 \, c^{3} x^{4} - 9 \, b c^{2} x^{2} + 15 \, b^{2} c\right )} \sqrt {c x^{4} + b x^{2}} \sqrt {x}\right )}}{77 \, c^{4} x} \]
Fricas 1.3.7 via sagemath 9.3 output
\[ {\rm integral}\left (\frac {\sqrt {c x^{4} + b x^{2}} x^{\frac {9}{2}}}{c x^{2} + b}, x\right ) \]