21.31 Problem number 250

\[ \int \frac {\sqrt {x} \left (A+B x^2\right )}{\sqrt {b x^2+c x^4}} \, dx \]

Optimal antiderivative \[ \frac {2 B \sqrt {c \,x^{4}+b \,x^{2}}}{3 c \sqrt {x}}-\frac {\left (-3 A c +b B \right ) x \sqrt {\frac {\cos \left (4 \arctan \left (\frac {c^{\frac {1}{4}} \sqrt {x}}{b^{\frac {1}{4}}}\right )\right )}{2}+\frac {1}{2}}\, \EllipticF \left (\sin \left (2 \arctan \left (\frac {c^{\frac {1}{4}} \sqrt {x}}{b^{\frac {1}{4}}}\right )\right ), \frac {\sqrt {2}}{2}\right ) \left (\sqrt {b}+x \sqrt {c}\right ) \sqrt {\frac {c \,x^{2}+b}{\left (\sqrt {b}+x \sqrt {c}\right )^{2}}}}{3 \cos \left (2 \arctan \left (\frac {c^{\frac {1}{4}} \sqrt {x}}{b^{\frac {1}{4}}}\right )\right ) b^{\frac {1}{4}} c^{\frac {5}{4}} \sqrt {c \,x^{4}+b \,x^{2}}} \]

command

integrate((B*x^2+A)*x^(1/2)/(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

\[ -\frac {2 \, {\left ({\left (B b - 3 \, A c\right )} \sqrt {c} x {\rm weierstrassPInverse}\left (-\frac {4 \, b}{c}, 0, x\right ) - \sqrt {c x^{4} + b x^{2}} B c \sqrt {x}\right )}}{3 \, c^{2} x} \]

Fricas 1.3.7 via sagemath 9.3 output

\[ {\rm integral}\left (\frac {{\left (B x^{2} + A\right )} \sqrt {x}}{\sqrt {c x^{4} + b x^{2}}}, x\right ) \]