Optimal. Leaf size=65 \[ -\frac {x}{4 a \left (b+a x^2\right )^2}+\frac {x}{8 a b \left (b+a x^2\right )}+\frac {\tan ^{-1}\left (\frac {\sqrt {a} x}{\sqrt {b}}\right )}{8 a^{3/2} b^{3/2}} \]
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Rubi [A]
time = 0.02, antiderivative size = 65, normalized size of antiderivative = 1.00, number of steps
used = 4, number of rules used = 4, integrand size = 13, \(\frac {\text {number of rules}}{\text {integrand size}}\) = 0.308, Rules used = {269, 294, 205,
211} \begin {gather*} \frac {\text {ArcTan}\left (\frac {\sqrt {a} x}{\sqrt {b}}\right )}{8 a^{3/2} b^{3/2}}+\frac {x}{8 a b \left (a x^2+b\right )}-\frac {x}{4 a \left (a x^2+b\right )^2} \end {gather*}
Antiderivative was successfully verified.
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Rule 205
Rule 211
Rule 269
Rule 294
Rubi steps
\begin {align*} \int \frac {1}{\left (a+\frac {b}{x^2}\right )^3 x^4} \, dx &=\int \frac {x^2}{\left (b+a x^2\right )^3} \, dx\\ &=-\frac {x}{4 a \left (b+a x^2\right )^2}+\frac {\int \frac {1}{\left (b+a x^2\right )^2} \, dx}{4 a}\\ &=-\frac {x}{4 a \left (b+a x^2\right )^2}+\frac {x}{8 a b \left (b+a x^2\right )}+\frac {\int \frac {1}{b+a x^2} \, dx}{8 a b}\\ &=-\frac {x}{4 a \left (b+a x^2\right )^2}+\frac {x}{8 a b \left (b+a x^2\right )}+\frac {\tan ^{-1}\left (\frac {\sqrt {a} x}{\sqrt {b}}\right )}{8 a^{3/2} b^{3/2}}\\ \end {align*}
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Mathematica [A]
time = 0.02, size = 58, normalized size = 0.89 \begin {gather*} \frac {\frac {\sqrt {a} \sqrt {b} x \left (-b+a x^2\right )}{\left (b+a x^2\right )^2}+\tan ^{-1}\left (\frac {\sqrt {a} x}{\sqrt {b}}\right )}{8 a^{3/2} b^{3/2}} \end {gather*}
Antiderivative was successfully verified.
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Maple [A]
time = 0.05, size = 49, normalized size = 0.75
method | result | size |
default | \(\frac {\frac {x^{3}}{8 b}-\frac {x}{8 a}}{\left (a \,x^{2}+b \right )^{2}}+\frac {\arctan \left (\frac {a x}{\sqrt {a b}}\right )}{8 b a \sqrt {a b}}\) | \(49\) |
risch | \(\frac {\frac {x^{3}}{8 b}-\frac {x}{8 a}}{\left (a \,x^{2}+b \right )^{2}}-\frac {\ln \left (a x +\sqrt {-a b}\right )}{16 \sqrt {-a b}\, b a}+\frac {\ln \left (-a x +\sqrt {-a b}\right )}{16 \sqrt {-a b}\, b a}\) | \(78\) |
Verification of antiderivative is not currently implemented for this CAS.
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Maxima [A]
time = 0.50, size = 62, normalized size = 0.95 \begin {gather*} \frac {a x^{3} - b x}{8 \, {\left (a^{3} b x^{4} + 2 \, a^{2} b^{2} x^{2} + a b^{3}\right )}} + \frac {\arctan \left (\frac {a x}{\sqrt {a b}}\right )}{8 \, \sqrt {a b} a b} \end {gather*}
Verification of antiderivative is not currently implemented for this CAS.
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Fricas [A]
time = 0.38, size = 190, normalized size = 2.92 \begin {gather*} \left [\frac {2 \, a^{2} b x^{3} - 2 \, a b^{2} x - {\left (a^{2} x^{4} + 2 \, a b x^{2} + b^{2}\right )} \sqrt {-a b} \log \left (\frac {a x^{2} - 2 \, \sqrt {-a b} x - b}{a x^{2} + b}\right )}{16 \, {\left (a^{4} b^{2} x^{4} + 2 \, a^{3} b^{3} x^{2} + a^{2} b^{4}\right )}}, \frac {a^{2} b x^{3} - a b^{2} x + {\left (a^{2} x^{4} + 2 \, a b x^{2} + b^{2}\right )} \sqrt {a b} \arctan \left (\frac {\sqrt {a b} x}{b}\right )}{8 \, {\left (a^{4} b^{2} x^{4} + 2 \, a^{3} b^{3} x^{2} + a^{2} b^{4}\right )}}\right ] \end {gather*}
Verification of antiderivative is not currently implemented for this CAS.
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Sympy [B] Leaf count of result is larger than twice the leaf count of optimal. 110 vs.
\(2 (51) = 102\).
time = 0.14, size = 110, normalized size = 1.69 \begin {gather*} - \frac {\sqrt {- \frac {1}{a^{3} b^{3}}} \log {\left (- a b^{2} \sqrt {- \frac {1}{a^{3} b^{3}}} + x \right )}}{16} + \frac {\sqrt {- \frac {1}{a^{3} b^{3}}} \log {\left (a b^{2} \sqrt {- \frac {1}{a^{3} b^{3}}} + x \right )}}{16} + \frac {a x^{3} - b x}{8 a^{3} b x^{4} + 16 a^{2} b^{2} x^{2} + 8 a b^{3}} \end {gather*}
Verification of antiderivative is not currently implemented for this CAS.
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Giac [A]
time = 0.90, size = 50, normalized size = 0.77 \begin {gather*} \frac {\arctan \left (\frac {a x}{\sqrt {a b}}\right )}{8 \, \sqrt {a b} a b} + \frac {a x^{3} - b x}{8 \, {\left (a x^{2} + b\right )}^{2} a b} \end {gather*}
Verification of antiderivative is not currently implemented for this CAS.
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Mupad [B]
time = 1.12, size = 55, normalized size = 0.85 \begin {gather*} \frac {\mathrm {atan}\left (\frac {\sqrt {a}\,x}{\sqrt {b}}\right )}{8\,a^{3/2}\,b^{3/2}}-\frac {\frac {x}{8\,a}-\frac {x^3}{8\,b}}{a^2\,x^4+2\,a\,b\,x^2+b^2} \end {gather*}
Verification of antiderivative is not currently implemented for this CAS.
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