Integrand size = 15, antiderivative size = 91 \[ \int \frac {\left (a+b x^4\right )^{5/4}}{x^5} \, dx=\frac {5}{4} b \sqrt [4]{a+b x^4}-\frac {\left (a+b x^4\right )^{5/4}}{4 x^4}-\frac {5}{8} \sqrt [4]{a} b \arctan \left (\frac {\sqrt [4]{a+b x^4}}{\sqrt [4]{a}}\right )-\frac {5}{8} \sqrt [4]{a} b \text {arctanh}\left (\frac {\sqrt [4]{a+b x^4}}{\sqrt [4]{a}}\right ) \]
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Time = 0.04 (sec) , antiderivative size = 91, normalized size of antiderivative = 1.00, number of steps used = 7, number of rules used = 7, \(\frac {\text {number of rules}}{\text {integrand size}}\) = 0.467, Rules used = {272, 43, 52, 65, 218, 212, 209} \[ \int \frac {\left (a+b x^4\right )^{5/4}}{x^5} \, dx=-\frac {5}{8} \sqrt [4]{a} b \arctan \left (\frac {\sqrt [4]{a+b x^4}}{\sqrt [4]{a}}\right )-\frac {5}{8} \sqrt [4]{a} b \text {arctanh}\left (\frac {\sqrt [4]{a+b x^4}}{\sqrt [4]{a}}\right )-\frac {\left (a+b x^4\right )^{5/4}}{4 x^4}+\frac {5}{4} b \sqrt [4]{a+b x^4} \]
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Rule 43
Rule 52
Rule 65
Rule 209
Rule 212
Rule 218
Rule 272
Rubi steps \begin{align*} \text {integral}& = \frac {1}{4} \text {Subst}\left (\int \frac {(a+b x)^{5/4}}{x^2} \, dx,x,x^4\right ) \\ & = -\frac {\left (a+b x^4\right )^{5/4}}{4 x^4}+\frac {1}{16} (5 b) \text {Subst}\left (\int \frac {\sqrt [4]{a+b x}}{x} \, dx,x,x^4\right ) \\ & = \frac {5}{4} b \sqrt [4]{a+b x^4}-\frac {\left (a+b x^4\right )^{5/4}}{4 x^4}+\frac {1}{16} (5 a b) \text {Subst}\left (\int \frac {1}{x (a+b x)^{3/4}} \, dx,x,x^4\right ) \\ & = \frac {5}{4} b \sqrt [4]{a+b x^4}-\frac {\left (a+b x^4\right )^{5/4}}{4 x^4}+\frac {1}{4} (5 a) \text {Subst}\left (\int \frac {1}{-\frac {a}{b}+\frac {x^4}{b}} \, dx,x,\sqrt [4]{a+b x^4}\right ) \\ & = \frac {5}{4} b \sqrt [4]{a+b x^4}-\frac {\left (a+b x^4\right )^{5/4}}{4 x^4}-\frac {1}{8} \left (5 \sqrt {a} b\right ) \text {Subst}\left (\int \frac {1}{\sqrt {a}-x^2} \, dx,x,\sqrt [4]{a+b x^4}\right )-\frac {1}{8} \left (5 \sqrt {a} b\right ) \text {Subst}\left (\int \frac {1}{\sqrt {a}+x^2} \, dx,x,\sqrt [4]{a+b x^4}\right ) \\ & = \frac {5}{4} b \sqrt [4]{a+b x^4}-\frac {\left (a+b x^4\right )^{5/4}}{4 x^4}-\frac {5}{8} \sqrt [4]{a} b \tan ^{-1}\left (\frac {\sqrt [4]{a+b x^4}}{\sqrt [4]{a}}\right )-\frac {5}{8} \sqrt [4]{a} b \tanh ^{-1}\left (\frac {\sqrt [4]{a+b x^4}}{\sqrt [4]{a}}\right ) \\ \end{align*}
Time = 0.20 (sec) , antiderivative size = 81, normalized size of antiderivative = 0.89 \[ \int \frac {\left (a+b x^4\right )^{5/4}}{x^5} \, dx=\frac {1}{8} \left (-\frac {2 \left (a-4 b x^4\right ) \sqrt [4]{a+b x^4}}{x^4}-5 \sqrt [4]{a} b \arctan \left (\frac {\sqrt [4]{a+b x^4}}{\sqrt [4]{a}}\right )-5 \sqrt [4]{a} b \text {arctanh}\left (\frac {\sqrt [4]{a+b x^4}}{\sqrt [4]{a}}\right )\right ) \]
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Time = 4.41 (sec) , antiderivative size = 88, normalized size of antiderivative = 0.97
method | result | size |
pseudoelliptic | \(\frac {-5 b \,x^{4} \left (\ln \left (\frac {-\left (b \,x^{4}+a \right )^{\frac {1}{4}}-a^{\frac {1}{4}}}{-\left (b \,x^{4}+a \right )^{\frac {1}{4}}+a^{\frac {1}{4}}}\right )+2 \arctan \left (\frac {\left (b \,x^{4}+a \right )^{\frac {1}{4}}}{a^{\frac {1}{4}}}\right )\right ) a^{\frac {1}{4}}-4 \left (b \,x^{4}+a \right )^{\frac {1}{4}} \left (-4 b \,x^{4}+a \right )}{16 x^{4}}\) | \(88\) |
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Result contains complex when optimal does not.
Time = 0.31 (sec) , antiderivative size = 167, normalized size of antiderivative = 1.84 \[ \int \frac {\left (a+b x^4\right )^{5/4}}{x^5} \, dx=-\frac {5 \, \left (a b^{4}\right )^{\frac {1}{4}} x^{4} \log \left (5 \, {\left (b x^{4} + a\right )}^{\frac {1}{4}} b + 5 \, \left (a b^{4}\right )^{\frac {1}{4}}\right ) + 5 i \, \left (a b^{4}\right )^{\frac {1}{4}} x^{4} \log \left (5 \, {\left (b x^{4} + a\right )}^{\frac {1}{4}} b + 5 i \, \left (a b^{4}\right )^{\frac {1}{4}}\right ) - 5 i \, \left (a b^{4}\right )^{\frac {1}{4}} x^{4} \log \left (5 \, {\left (b x^{4} + a\right )}^{\frac {1}{4}} b - 5 i \, \left (a b^{4}\right )^{\frac {1}{4}}\right ) - 5 \, \left (a b^{4}\right )^{\frac {1}{4}} x^{4} \log \left (5 \, {\left (b x^{4} + a\right )}^{\frac {1}{4}} b - 5 \, \left (a b^{4}\right )^{\frac {1}{4}}\right ) - 4 \, {\left (4 \, b x^{4} - a\right )} {\left (b x^{4} + a\right )}^{\frac {1}{4}}}{16 \, x^{4}} \]
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Result contains complex when optimal does not.
Time = 1.00 (sec) , antiderivative size = 42, normalized size of antiderivative = 0.46 \[ \int \frac {\left (a+b x^4\right )^{5/4}}{x^5} \, dx=- \frac {b^{\frac {5}{4}} x \Gamma \left (- \frac {1}{4}\right ) {{}_{2}F_{1}\left (\begin {matrix} - \frac {5}{4}, - \frac {1}{4} \\ \frac {3}{4} \end {matrix}\middle | {\frac {a e^{i \pi }}{b x^{4}}} \right )}}{4 \Gamma \left (\frac {3}{4}\right )} \]
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none
Time = 0.27 (sec) , antiderivative size = 89, normalized size of antiderivative = 0.98 \[ \int \frac {\left (a+b x^4\right )^{5/4}}{x^5} \, dx=-\frac {5}{16} \, {\left (\frac {2 \, b \arctan \left (\frac {{\left (b x^{4} + a\right )}^{\frac {1}{4}}}{a^{\frac {1}{4}}}\right )}{a^{\frac {3}{4}}} - \frac {b \log \left (\frac {{\left (b x^{4} + a\right )}^{\frac {1}{4}} - a^{\frac {1}{4}}}{{\left (b x^{4} + a\right )}^{\frac {1}{4}} + a^{\frac {1}{4}}}\right )}{a^{\frac {3}{4}}}\right )} a + {\left (b x^{4} + a\right )}^{\frac {1}{4}} b - \frac {{\left (b x^{4} + a\right )}^{\frac {1}{4}} a}{4 \, x^{4}} \]
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Leaf count of result is larger than twice the leaf count of optimal. 221 vs. \(2 (67) = 134\).
Time = 0.31 (sec) , antiderivative size = 221, normalized size of antiderivative = 2.43 \[ \int \frac {\left (a+b x^4\right )^{5/4}}{x^5} \, dx=-\frac {10 \, \sqrt {2} \left (-a\right )^{\frac {1}{4}} b^{2} \arctan \left (\frac {\sqrt {2} {\left (\sqrt {2} \left (-a\right )^{\frac {1}{4}} + 2 \, {\left (b x^{4} + a\right )}^{\frac {1}{4}}\right )}}{2 \, \left (-a\right )^{\frac {1}{4}}}\right ) + 10 \, \sqrt {2} \left (-a\right )^{\frac {1}{4}} b^{2} \arctan \left (-\frac {\sqrt {2} {\left (\sqrt {2} \left (-a\right )^{\frac {1}{4}} - 2 \, {\left (b x^{4} + a\right )}^{\frac {1}{4}}\right )}}{2 \, \left (-a\right )^{\frac {1}{4}}}\right ) + 5 \, \sqrt {2} \left (-a\right )^{\frac {1}{4}} b^{2} \log \left (\sqrt {2} {\left (b x^{4} + a\right )}^{\frac {1}{4}} \left (-a\right )^{\frac {1}{4}} + \sqrt {b x^{4} + a} + \sqrt {-a}\right ) - 5 \, \sqrt {2} \left (-a\right )^{\frac {1}{4}} b^{2} \log \left (-\sqrt {2} {\left (b x^{4} + a\right )}^{\frac {1}{4}} \left (-a\right )^{\frac {1}{4}} + \sqrt {b x^{4} + a} + \sqrt {-a}\right ) - 32 \, {\left (b x^{4} + a\right )}^{\frac {1}{4}} b^{2} + \frac {8 \, {\left (b x^{4} + a\right )}^{\frac {1}{4}} a b}{x^{4}}}{32 \, b} \]
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Time = 6.10 (sec) , antiderivative size = 70, normalized size of antiderivative = 0.77 \[ \int \frac {\left (a+b x^4\right )^{5/4}}{x^5} \, dx=b\,{\left (b\,x^4+a\right )}^{1/4}-\frac {a\,{\left (b\,x^4+a\right )}^{1/4}}{4\,x^4}-\frac {5\,a^{1/4}\,b\,\mathrm {atan}\left (\frac {{\left (b\,x^4+a\right )}^{1/4}}{a^{1/4}}\right )}{8}+\frac {a^{1/4}\,b\,\mathrm {atan}\left (\frac {{\left (b\,x^4+a\right )}^{1/4}\,1{}\mathrm {i}}{a^{1/4}}\right )\,5{}\mathrm {i}}{8} \]
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