Optimal. Leaf size=53 \[ \frac {1}{12} \sqrt {x^4+x} \left (2 a x^4+a x+4 b x\right )+\frac {1}{12} (4 b-a) \tanh ^{-1}\left (\frac {x^2}{\sqrt {x^4+x}}\right ) \]
________________________________________________________________________________________
Rubi [A] time = 0.11, antiderivative size = 86, normalized size of antiderivative = 1.62, number of steps used = 9, number of rules used = 6, integrand size = 17, \(\frac {\text {number of rules}}{\text {integrand size}}\) = 0.353, Rules used = {2053, 2004, 2029, 206, 2021, 2024} \begin {gather*} \frac {1}{6} a \sqrt {x^4+x} x^4+\frac {1}{12} a \sqrt {x^4+x} x-\frac {1}{12} a \tanh ^{-1}\left (\frac {x^2}{\sqrt {x^4+x}}\right )+\frac {1}{3} b \sqrt {x^4+x} x+\frac {1}{3} b \tanh ^{-1}\left (\frac {x^2}{\sqrt {x^4+x}}\right ) \end {gather*}
Antiderivative was successfully verified.
[In]
[Out]
Rule 206
Rule 2004
Rule 2021
Rule 2024
Rule 2029
Rule 2053
Rubi steps
\begin {align*} \int \left (b+a x^3\right ) \sqrt {x+x^4} \, dx &=\int \left (b \sqrt {x+x^4}+a x^3 \sqrt {x+x^4}\right ) \, dx\\ &=a \int x^3 \sqrt {x+x^4} \, dx+b \int \sqrt {x+x^4} \, dx\\ &=\frac {1}{3} b x \sqrt {x+x^4}+\frac {1}{6} a x^4 \sqrt {x+x^4}+\frac {1}{4} a \int \frac {x^4}{\sqrt {x+x^4}} \, dx+\frac {1}{2} b \int \frac {x}{\sqrt {x+x^4}} \, dx\\ &=\frac {1}{12} a x \sqrt {x+x^4}+\frac {1}{3} b x \sqrt {x+x^4}+\frac {1}{6} a x^4 \sqrt {x+x^4}-\frac {1}{8} a \int \frac {x}{\sqrt {x+x^4}} \, dx+\frac {1}{3} b \operatorname {Subst}\left (\int \frac {1}{1-x^2} \, dx,x,\frac {x^2}{\sqrt {x+x^4}}\right )\\ &=\frac {1}{12} a x \sqrt {x+x^4}+\frac {1}{3} b x \sqrt {x+x^4}+\frac {1}{6} a x^4 \sqrt {x+x^4}+\frac {1}{3} b \tanh ^{-1}\left (\frac {x^2}{\sqrt {x+x^4}}\right )-\frac {1}{12} a \operatorname {Subst}\left (\int \frac {1}{1-x^2} \, dx,x,\frac {x^2}{\sqrt {x+x^4}}\right )\\ &=\frac {1}{12} a x \sqrt {x+x^4}+\frac {1}{3} b x \sqrt {x+x^4}+\frac {1}{6} a x^4 \sqrt {x+x^4}-\frac {1}{12} a \tanh ^{-1}\left (\frac {x^2}{\sqrt {x+x^4}}\right )+\frac {1}{3} b \tanh ^{-1}\left (\frac {x^2}{\sqrt {x+x^4}}\right )\\ \end {align*}
________________________________________________________________________________________
Mathematica [A] time = 0.06, size = 58, normalized size = 1.09 \begin {gather*} \frac {\sqrt {x^4+x} \left (x^{3/2} \left (2 a x^3+a+4 b\right )-\frac {(a-4 b) \sinh ^{-1}\left (x^{3/2}\right )}{\sqrt {x^3+1}}\right )}{12 \sqrt {x}} \end {gather*}
Antiderivative was successfully verified.
[In]
[Out]
________________________________________________________________________________________
IntegrateAlgebraic [A] time = 0.49, size = 53, normalized size = 1.00 \begin {gather*} \frac {1}{12} \sqrt {x^4+x} \left (2 a x^4+a x+4 b x\right )+\frac {1}{12} (4 b-a) \tanh ^{-1}\left (\frac {x^2}{\sqrt {x^4+x}}\right ) \end {gather*}
Antiderivative was successfully verified.
[In]
[Out]
________________________________________________________________________________________
fricas [A] time = 0.45, size = 49, normalized size = 0.92 \begin {gather*} -\frac {1}{24} \, {\left (a - 4 \, b\right )} \log \left (-2 \, x^{3} - 2 \, \sqrt {x^{4} + x} x - 1\right ) + \frac {1}{12} \, {\left (2 \, a x^{4} + {\left (a + 4 \, b\right )} x\right )} \sqrt {x^{4} + x} \end {gather*}
Verification of antiderivative is not currently implemented for this CAS.
[In]
[Out]
________________________________________________________________________________________
giac [A] time = 0.28, size = 53, normalized size = 1.00 \begin {gather*} \frac {1}{12} \, {\left (2 \, a x^{3} + a + 4 \, b\right )} \sqrt {x^{4} + x} x - \frac {1}{24} \, {\left (a - 4 \, b\right )} {\left (\log \left (\sqrt {\frac {1}{x^{3}} + 1} + 1\right ) - \log \left ({\left | \sqrt {\frac {1}{x^{3}} + 1} - 1 \right |}\right )\right )} \end {gather*}
Verification of antiderivative is not currently implemented for this CAS.
[In]
[Out]
________________________________________________________________________________________
maple [C] time = 0.01, size = 618, normalized size = 11.66 \begin {gather*} a \left (\frac {x^{4} \sqrt {x^{4}+x}}{6}+\frac {x \sqrt {x^{4}+x}}{12}+\frac {\left (-\frac {1}{2}-\frac {i \sqrt {3}}{2}\right ) \sqrt {\frac {\left (\frac {3}{2}+\frac {i \sqrt {3}}{2}\right ) x}{\left (\frac {1}{2}+\frac {i \sqrt {3}}{2}\right ) \left (1+x \right )}}\, \left (1+x \right )^{2} \sqrt {-\frac {x -\frac {1}{2}+\frac {i \sqrt {3}}{2}}{\left (\frac {1}{2}-\frac {i \sqrt {3}}{2}\right ) \left (1+x \right )}}\, \sqrt {-\frac {x -\frac {1}{2}-\frac {i \sqrt {3}}{2}}{\left (\frac {1}{2}+\frac {i \sqrt {3}}{2}\right ) \left (1+x \right )}}\, \left (-\EllipticF \left (\sqrt {\frac {\left (\frac {3}{2}+\frac {i \sqrt {3}}{2}\right ) x}{\left (\frac {1}{2}+\frac {i \sqrt {3}}{2}\right ) \left (1+x \right )}}, \sqrt {\frac {\left (-\frac {3}{2}+\frac {i \sqrt {3}}{2}\right ) \left (-\frac {1}{2}-\frac {i \sqrt {3}}{2}\right )}{\left (-\frac {1}{2}+\frac {i \sqrt {3}}{2}\right ) \left (-\frac {3}{2}-\frac {i \sqrt {3}}{2}\right )}}\right )+\EllipticPi \left (\sqrt {\frac {\left (\frac {3}{2}+\frac {i \sqrt {3}}{2}\right ) x}{\left (\frac {1}{2}+\frac {i \sqrt {3}}{2}\right ) \left (1+x \right )}}, \frac {\frac {1}{2}+\frac {i \sqrt {3}}{2}}{\frac {3}{2}+\frac {i \sqrt {3}}{2}}, \sqrt {\frac {\left (-\frac {3}{2}+\frac {i \sqrt {3}}{2}\right ) \left (-\frac {1}{2}-\frac {i \sqrt {3}}{2}\right )}{\left (-\frac {1}{2}+\frac {i \sqrt {3}}{2}\right ) \left (-\frac {3}{2}-\frac {i \sqrt {3}}{2}\right )}}\right )\right )}{4 \left (\frac {3}{2}+\frac {i \sqrt {3}}{2}\right ) \sqrt {x \left (1+x \right ) \left (x -\frac {1}{2}+\frac {i \sqrt {3}}{2}\right ) \left (x -\frac {1}{2}-\frac {i \sqrt {3}}{2}\right )}}\right )+b \left (\frac {x \sqrt {x^{4}+x}}{3}-\frac {\left (-\frac {1}{2}-\frac {i \sqrt {3}}{2}\right ) \sqrt {\frac {\left (\frac {3}{2}+\frac {i \sqrt {3}}{2}\right ) x}{\left (\frac {1}{2}+\frac {i \sqrt {3}}{2}\right ) \left (1+x \right )}}\, \left (1+x \right )^{2} \sqrt {-\frac {x -\frac {1}{2}+\frac {i \sqrt {3}}{2}}{\left (\frac {1}{2}-\frac {i \sqrt {3}}{2}\right ) \left (1+x \right )}}\, \sqrt {-\frac {x -\frac {1}{2}-\frac {i \sqrt {3}}{2}}{\left (\frac {1}{2}+\frac {i \sqrt {3}}{2}\right ) \left (1+x \right )}}\, \left (-\EllipticF \left (\sqrt {\frac {\left (\frac {3}{2}+\frac {i \sqrt {3}}{2}\right ) x}{\left (\frac {1}{2}+\frac {i \sqrt {3}}{2}\right ) \left (1+x \right )}}, \sqrt {\frac {\left (-\frac {3}{2}+\frac {i \sqrt {3}}{2}\right ) \left (-\frac {1}{2}-\frac {i \sqrt {3}}{2}\right )}{\left (-\frac {1}{2}+\frac {i \sqrt {3}}{2}\right ) \left (-\frac {3}{2}-\frac {i \sqrt {3}}{2}\right )}}\right )+\EllipticPi \left (\sqrt {\frac {\left (\frac {3}{2}+\frac {i \sqrt {3}}{2}\right ) x}{\left (\frac {1}{2}+\frac {i \sqrt {3}}{2}\right ) \left (1+x \right )}}, \frac {\frac {1}{2}+\frac {i \sqrt {3}}{2}}{\frac {3}{2}+\frac {i \sqrt {3}}{2}}, \sqrt {\frac {\left (-\frac {3}{2}+\frac {i \sqrt {3}}{2}\right ) \left (-\frac {1}{2}-\frac {i \sqrt {3}}{2}\right )}{\left (-\frac {1}{2}+\frac {i \sqrt {3}}{2}\right ) \left (-\frac {3}{2}-\frac {i \sqrt {3}}{2}\right )}}\right )\right )}{\left (\frac {3}{2}+\frac {i \sqrt {3}}{2}\right ) \sqrt {x \left (1+x \right ) \left (x -\frac {1}{2}+\frac {i \sqrt {3}}{2}\right ) \left (x -\frac {1}{2}-\frac {i \sqrt {3}}{2}\right )}}\right ) \end {gather*}
Verification of antiderivative is not currently implemented for this CAS.
[In]
[Out]
________________________________________________________________________________________
maxima [F] time = 0.00, size = 0, normalized size = 0.00 \begin {gather*} \int {\left (a x^{3} + b\right )} \sqrt {x^{4} + x}\,{d x} \end {gather*}
Verification of antiderivative is not currently implemented for this CAS.
[In]
[Out]
________________________________________________________________________________________
mupad [F] time = 0.00, size = -1, normalized size = -0.02 \begin {gather*} \int \left (a\,x^3+b\right )\,\sqrt {x^4+x} \,d x \end {gather*}
Verification of antiderivative is not currently implemented for this CAS.
[In]
[Out]
________________________________________________________________________________________
sympy [F] time = 0.00, size = 0, normalized size = 0.00 \begin {gather*} \int \sqrt {x \left (x + 1\right ) \left (x^{2} - x + 1\right )} \left (a x^{3} + b\right )\, dx \end {gather*}
Verification of antiderivative is not currently implemented for this CAS.
[In]
[Out]
________________________________________________________________________________________