Integrand size = 17, antiderivative size = 86 \[ \int \frac {x^6}{\left (-b+a x^4\right )^{3/4}} \, dx=\frac {x^3 \sqrt [4]{-b+a x^4}}{4 a}-\frac {3 b \arctan \left (\frac {\sqrt [4]{a} x}{\sqrt [4]{-b+a x^4}}\right )}{8 a^{7/4}}+\frac {3 b \text {arctanh}\left (\frac {\sqrt [4]{a} x}{\sqrt [4]{-b+a x^4}}\right )}{8 a^{7/4}} \]
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Time = 0.04 (sec) , antiderivative size = 86, normalized size of antiderivative = 1.00, number of steps used = 5, number of rules used = 5, \(\frac {\text {number of rules}}{\text {integrand size}}\) = 0.294, Rules used = {327, 338, 304, 209, 212} \[ \int \frac {x^6}{\left (-b+a x^4\right )^{3/4}} \, dx=-\frac {3 b \arctan \left (\frac {\sqrt [4]{a} x}{\sqrt [4]{a x^4-b}}\right )}{8 a^{7/4}}+\frac {3 b \text {arctanh}\left (\frac {\sqrt [4]{a} x}{\sqrt [4]{a x^4-b}}\right )}{8 a^{7/4}}+\frac {x^3 \sqrt [4]{a x^4-b}}{4 a} \]
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Rule 209
Rule 212
Rule 304
Rule 327
Rule 338
Rubi steps \begin{align*} \text {integral}& = \frac {x^3 \sqrt [4]{-b+a x^4}}{4 a}+\frac {(3 b) \int \frac {x^2}{\left (-b+a x^4\right )^{3/4}} \, dx}{4 a} \\ & = \frac {x^3 \sqrt [4]{-b+a x^4}}{4 a}+\frac {(3 b) \text {Subst}\left (\int \frac {x^2}{1-a x^4} \, dx,x,\frac {x}{\sqrt [4]{-b+a x^4}}\right )}{4 a} \\ & = \frac {x^3 \sqrt [4]{-b+a x^4}}{4 a}+\frac {(3 b) \text {Subst}\left (\int \frac {1}{1-\sqrt {a} x^2} \, dx,x,\frac {x}{\sqrt [4]{-b+a x^4}}\right )}{8 a^{3/2}}-\frac {(3 b) \text {Subst}\left (\int \frac {1}{1+\sqrt {a} x^2} \, dx,x,\frac {x}{\sqrt [4]{-b+a x^4}}\right )}{8 a^{3/2}} \\ & = \frac {x^3 \sqrt [4]{-b+a x^4}}{4 a}-\frac {3 b \arctan \left (\frac {\sqrt [4]{a} x}{\sqrt [4]{-b+a x^4}}\right )}{8 a^{7/4}}+\frac {3 b \text {arctanh}\left (\frac {\sqrt [4]{a} x}{\sqrt [4]{-b+a x^4}}\right )}{8 a^{7/4}} \\ \end{align*}
Time = 0.32 (sec) , antiderivative size = 81, normalized size of antiderivative = 0.94 \[ \int \frac {x^6}{\left (-b+a x^4\right )^{3/4}} \, dx=\frac {2 a^{3/4} x^3 \sqrt [4]{-b+a x^4}-3 b \arctan \left (\frac {\sqrt [4]{a} x}{\sqrt [4]{-b+a x^4}}\right )+3 b \text {arctanh}\left (\frac {\sqrt [4]{a} x}{\sqrt [4]{-b+a x^4}}\right )}{8 a^{7/4}} \]
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Time = 1.25 (sec) , antiderivative size = 94, normalized size of antiderivative = 1.09
method | result | size |
pseudoelliptic | \(\frac {4 x^{3} \left (a \,x^{4}-b \right )^{\frac {1}{4}} a^{\frac {3}{4}}+3 \ln \left (\frac {-a^{\frac {1}{4}} x -\left (a \,x^{4}-b \right )^{\frac {1}{4}}}{a^{\frac {1}{4}} x -\left (a \,x^{4}-b \right )^{\frac {1}{4}}}\right ) b +6 \arctan \left (\frac {\left (a \,x^{4}-b \right )^{\frac {1}{4}}}{a^{\frac {1}{4}} x}\right ) b}{16 a^{\frac {7}{4}}}\) | \(94\) |
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Result contains complex when optimal does not.
Time = 0.31 (sec) , antiderivative size = 211, normalized size of antiderivative = 2.45 \[ \int \frac {x^6}{\left (-b+a x^4\right )^{3/4}} \, dx=\frac {4 \, {\left (a x^{4} - b\right )}^{\frac {1}{4}} x^{3} + 3 \, a \left (\frac {b^{4}}{a^{7}}\right )^{\frac {1}{4}} \log \left (\frac {3 \, {\left (a^{2} x \left (\frac {b^{4}}{a^{7}}\right )^{\frac {1}{4}} + {\left (a x^{4} - b\right )}^{\frac {1}{4}} b\right )}}{x}\right ) - 3 \, a \left (\frac {b^{4}}{a^{7}}\right )^{\frac {1}{4}} \log \left (-\frac {3 \, {\left (a^{2} x \left (\frac {b^{4}}{a^{7}}\right )^{\frac {1}{4}} - {\left (a x^{4} - b\right )}^{\frac {1}{4}} b\right )}}{x}\right ) - 3 i \, a \left (\frac {b^{4}}{a^{7}}\right )^{\frac {1}{4}} \log \left (-\frac {3 \, {\left (i \, a^{2} x \left (\frac {b^{4}}{a^{7}}\right )^{\frac {1}{4}} - {\left (a x^{4} - b\right )}^{\frac {1}{4}} b\right )}}{x}\right ) + 3 i \, a \left (\frac {b^{4}}{a^{7}}\right )^{\frac {1}{4}} \log \left (-\frac {3 \, {\left (-i \, a^{2} x \left (\frac {b^{4}}{a^{7}}\right )^{\frac {1}{4}} - {\left (a x^{4} - b\right )}^{\frac {1}{4}} b\right )}}{x}\right )}{16 \, a} \]
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Result contains complex when optimal does not.
Time = 0.74 (sec) , antiderivative size = 41, normalized size of antiderivative = 0.48 \[ \int \frac {x^6}{\left (-b+a x^4\right )^{3/4}} \, dx=- \frac {x^{7} e^{\frac {i \pi }{4}} \Gamma \left (\frac {7}{4}\right ) {{}_{2}F_{1}\left (\begin {matrix} \frac {3}{4}, \frac {7}{4} \\ \frac {11}{4} \end {matrix}\middle | {\frac {a x^{4}}{b}} \right )}}{4 b^{\frac {3}{4}} \Gamma \left (\frac {11}{4}\right )} \]
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none
Time = 0.28 (sec) , antiderivative size = 120, normalized size of antiderivative = 1.40 \[ \int \frac {x^6}{\left (-b+a x^4\right )^{3/4}} \, dx=\frac {3 \, {\left (\frac {2 \, b \arctan \left (\frac {{\left (a x^{4} - b\right )}^{\frac {1}{4}}}{a^{\frac {1}{4}} x}\right )}{a^{\frac {3}{4}}} - \frac {b \log \left (-\frac {a^{\frac {1}{4}} - \frac {{\left (a x^{4} - b\right )}^{\frac {1}{4}}}{x}}{a^{\frac {1}{4}} + \frac {{\left (a x^{4} - b\right )}^{\frac {1}{4}}}{x}}\right )}{a^{\frac {3}{4}}}\right )}}{16 \, a} + \frac {{\left (a x^{4} - b\right )}^{\frac {1}{4}} b}{4 \, {\left (a^{2} - \frac {{\left (a x^{4} - b\right )} a}{x^{4}}\right )} x} \]
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\[ \int \frac {x^6}{\left (-b+a x^4\right )^{3/4}} \, dx=\int { \frac {x^{6}}{{\left (a x^{4} - b\right )}^{\frac {3}{4}}} \,d x } \]
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Timed out. \[ \int \frac {x^6}{\left (-b+a x^4\right )^{3/4}} \, dx=\int \frac {x^6}{{\left (a\,x^4-b\right )}^{3/4}} \,d x \]
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