Integrand size = 26, antiderivative size = 134 \[ \int \frac {x^4 \sqrt [4]{b x^3+a x^4}}{b+a x} \, dx=\frac {\sqrt [4]{b x^3+a x^4} \left (7315 b^4-4180 a b^3 x+3040 a^2 b^2 x^2-2432 a^3 b x^3+2048 a^4 x^4\right )}{10240 a^5}+\frac {4389 b^5 \arctan \left (\frac {\sqrt [4]{a} x}{\sqrt [4]{b x^3+a x^4}}\right )}{4096 a^{23/4}}-\frac {4389 b^5 \text {arctanh}\left (\frac {\sqrt [4]{a} x}{\sqrt [4]{b x^3+a x^4}}\right )}{4096 a^{23/4}} \]
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Time = 0.17 (sec) , antiderivative size = 255, normalized size of antiderivative = 1.90, number of steps used = 11, number of rules used = 7, \(\frac {\text {number of rules}}{\text {integrand size}}\) = 0.269, Rules used = {2081, 52, 65, 338, 304, 209, 212} \[ \int \frac {x^4 \sqrt [4]{b x^3+a x^4}}{b+a x} \, dx=\frac {4389 b^5 \sqrt [4]{a x^4+b x^3} \arctan \left (\frac {\sqrt [4]{a} \sqrt [4]{x}}{\sqrt [4]{a x+b}}\right )}{4096 a^{23/4} x^{3/4} \sqrt [4]{a x+b}}-\frac {4389 b^5 \sqrt [4]{a x^4+b x^3} \text {arctanh}\left (\frac {\sqrt [4]{a} \sqrt [4]{x}}{\sqrt [4]{a x+b}}\right )}{4096 a^{23/4} x^{3/4} \sqrt [4]{a x+b}}+\frac {1463 b^4 \sqrt [4]{a x^4+b x^3}}{2048 a^5}-\frac {209 b^3 x \sqrt [4]{a x^4+b x^3}}{512 a^4}+\frac {19 b^2 x^2 \sqrt [4]{a x^4+b x^3}}{64 a^3}-\frac {19 b x^3 \sqrt [4]{a x^4+b x^3}}{80 a^2}+\frac {x^4 \sqrt [4]{a x^4+b x^3}}{5 a} \]
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Rule 52
Rule 65
Rule 209
Rule 212
Rule 304
Rule 338
Rule 2081
Rubi steps \begin{align*} \text {integral}& = \frac {\sqrt [4]{b x^3+a x^4} \int \frac {x^{19/4}}{(b+a x)^{3/4}} \, dx}{x^{3/4} \sqrt [4]{b+a x}} \\ & = \frac {x^4 \sqrt [4]{b x^3+a x^4}}{5 a}-\frac {\left (19 b \sqrt [4]{b x^3+a x^4}\right ) \int \frac {x^{15/4}}{(b+a x)^{3/4}} \, dx}{20 a x^{3/4} \sqrt [4]{b+a x}} \\ & = -\frac {19 b x^3 \sqrt [4]{b x^3+a x^4}}{80 a^2}+\frac {x^4 \sqrt [4]{b x^3+a x^4}}{5 a}+\frac {\left (57 b^2 \sqrt [4]{b x^3+a x^4}\right ) \int \frac {x^{11/4}}{(b+a x)^{3/4}} \, dx}{64 a^2 x^{3/4} \sqrt [4]{b+a x}} \\ & = \frac {19 b^2 x^2 \sqrt [4]{b x^3+a x^4}}{64 a^3}-\frac {19 b x^3 \sqrt [4]{b x^3+a x^4}}{80 a^2}+\frac {x^4 \sqrt [4]{b x^3+a x^4}}{5 a}-\frac {\left (209 b^3 \sqrt [4]{b x^3+a x^4}\right ) \int \frac {x^{7/4}}{(b+a x)^{3/4}} \, dx}{256 a^3 x^{3/4} \sqrt [4]{b+a x}} \\ & = -\frac {209 b^3 x \sqrt [4]{b x^3+a x^4}}{512 a^4}+\frac {19 b^2 x^2 \sqrt [4]{b x^3+a x^4}}{64 a^3}-\frac {19 b x^3 \sqrt [4]{b x^3+a x^4}}{80 a^2}+\frac {x^4 \sqrt [4]{b x^3+a x^4}}{5 a}+\frac {\left (1463 b^4 \sqrt [4]{b x^3+a x^4}\right ) \int \frac {x^{3/4}}{(b+a x)^{3/4}} \, dx}{2048 a^4 x^{3/4} \sqrt [4]{b+a x}} \\ & = \frac {1463 b^4 \sqrt [4]{b x^3+a x^4}}{2048 a^5}-\frac {209 b^3 x \sqrt [4]{b x^3+a x^4}}{512 a^4}+\frac {19 b^2 x^2 \sqrt [4]{b x^3+a x^4}}{64 a^3}-\frac {19 b x^3 \sqrt [4]{b x^3+a x^4}}{80 a^2}+\frac {x^4 \sqrt [4]{b x^3+a x^4}}{5 a}-\frac {\left (4389 b^5 \sqrt [4]{b x^3+a x^4}\right ) \int \frac {1}{\sqrt [4]{x} (b+a x)^{3/4}} \, dx}{8192 a^5 x^{3/4} \sqrt [4]{b+a x}} \\ & = \frac {1463 b^4 \sqrt [4]{b x^3+a x^4}}{2048 a^5}-\frac {209 b^3 x \sqrt [4]{b x^3+a x^4}}{512 a^4}+\frac {19 b^2 x^2 \sqrt [4]{b x^3+a x^4}}{64 a^3}-\frac {19 b x^3 \sqrt [4]{b x^3+a x^4}}{80 a^2}+\frac {x^4 \sqrt [4]{b x^3+a x^4}}{5 a}-\frac {\left (4389 b^5 \sqrt [4]{b x^3+a x^4}\right ) \text {Subst}\left (\int \frac {x^2}{\left (b+a x^4\right )^{3/4}} \, dx,x,\sqrt [4]{x}\right )}{2048 a^5 x^{3/4} \sqrt [4]{b+a x}} \\ & = \frac {1463 b^4 \sqrt [4]{b x^3+a x^4}}{2048 a^5}-\frac {209 b^3 x \sqrt [4]{b x^3+a x^4}}{512 a^4}+\frac {19 b^2 x^2 \sqrt [4]{b x^3+a x^4}}{64 a^3}-\frac {19 b x^3 \sqrt [4]{b x^3+a x^4}}{80 a^2}+\frac {x^4 \sqrt [4]{b x^3+a x^4}}{5 a}-\frac {\left (4389 b^5 \sqrt [4]{b x^3+a x^4}\right ) \text {Subst}\left (\int \frac {x^2}{1-a x^4} \, dx,x,\frac {\sqrt [4]{x}}{\sqrt [4]{b+a x}}\right )}{2048 a^5 x^{3/4} \sqrt [4]{b+a x}} \\ & = \frac {1463 b^4 \sqrt [4]{b x^3+a x^4}}{2048 a^5}-\frac {209 b^3 x \sqrt [4]{b x^3+a x^4}}{512 a^4}+\frac {19 b^2 x^2 \sqrt [4]{b x^3+a x^4}}{64 a^3}-\frac {19 b x^3 \sqrt [4]{b x^3+a x^4}}{80 a^2}+\frac {x^4 \sqrt [4]{b x^3+a x^4}}{5 a}-\frac {\left (4389 b^5 \sqrt [4]{b x^3+a x^4}\right ) \text {Subst}\left (\int \frac {1}{1-\sqrt {a} x^2} \, dx,x,\frac {\sqrt [4]{x}}{\sqrt [4]{b+a x}}\right )}{4096 a^{11/2} x^{3/4} \sqrt [4]{b+a x}}+\frac {\left (4389 b^5 \sqrt [4]{b x^3+a x^4}\right ) \text {Subst}\left (\int \frac {1}{1+\sqrt {a} x^2} \, dx,x,\frac {\sqrt [4]{x}}{\sqrt [4]{b+a x}}\right )}{4096 a^{11/2} x^{3/4} \sqrt [4]{b+a x}} \\ & = \frac {1463 b^4 \sqrt [4]{b x^3+a x^4}}{2048 a^5}-\frac {209 b^3 x \sqrt [4]{b x^3+a x^4}}{512 a^4}+\frac {19 b^2 x^2 \sqrt [4]{b x^3+a x^4}}{64 a^3}-\frac {19 b x^3 \sqrt [4]{b x^3+a x^4}}{80 a^2}+\frac {x^4 \sqrt [4]{b x^3+a x^4}}{5 a}+\frac {4389 b^5 \sqrt [4]{b x^3+a x^4} \arctan \left (\frac {\sqrt [4]{a} \sqrt [4]{x}}{\sqrt [4]{b+a x}}\right )}{4096 a^{23/4} x^{3/4} \sqrt [4]{b+a x}}-\frac {4389 b^5 \sqrt [4]{b x^3+a x^4} \text {arctanh}\left (\frac {\sqrt [4]{a} \sqrt [4]{x}}{\sqrt [4]{b+a x}}\right )}{4096 a^{23/4} x^{3/4} \sqrt [4]{b+a x}} \\ \end{align*}
Time = 0.30 (sec) , antiderivative size = 162, normalized size of antiderivative = 1.21 \[ \int \frac {x^4 \sqrt [4]{b x^3+a x^4}}{b+a x} \, dx=\frac {x^{9/4} \left (2 a^{3/4} x^{3/4} \left (7315 b^5+3135 a b^4 x-1140 a^2 b^3 x^2+608 a^3 b^2 x^3-384 a^4 b x^4+2048 a^5 x^5\right )-21945 b^5 (b+a x)^{3/4} \arctan \left (\frac {\sqrt [4]{b+a x}}{\sqrt [4]{a} \sqrt [4]{x}}\right )-21945 b^5 (b+a x)^{3/4} \text {arctanh}\left (\frac {\sqrt [4]{b+a x}}{\sqrt [4]{a} \sqrt [4]{x}}\right )\right )}{20480 a^{23/4} \left (x^3 (b+a x)\right )^{3/4}} \]
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Time = 0.41 (sec) , antiderivative size = 132, normalized size of antiderivative = 0.99
method | result | size |
pseudoelliptic | \(-\frac {19 \left (\frac {1155 \ln \left (\frac {a^{\frac {1}{4}} x +\left (x^{3} \left (a x +b \right )\right )^{\frac {1}{4}}}{-a^{\frac {1}{4}} x +\left (x^{3} \left (a x +b \right )\right )^{\frac {1}{4}}}\right ) b^{5}}{512}+\frac {1155 \arctan \left (\frac {\left (x^{3} \left (a x +b \right )\right )^{\frac {1}{4}}}{a^{\frac {1}{4}} x}\right ) b^{5}}{256}+\left (x^{3} \left (a x +b \right )\right )^{\frac {1}{4}} \left (a^{\frac {15}{4}} b \,x^{3}-\frac {16 a^{\frac {19}{4}} x^{4}}{19}-\frac {385 a^{\frac {3}{4}} b^{4}}{128}+\frac {55 a^{\frac {7}{4}} b^{3} x}{32}-\frac {5 a^{\frac {11}{4}} b^{2} x^{2}}{4}\right )\right )}{80 a^{\frac {23}{4}}}\) | \(132\) |
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Result contains complex when optimal does not.
Time = 0.27 (sec) , antiderivative size = 275, normalized size of antiderivative = 2.05 \[ \int \frac {x^4 \sqrt [4]{b x^3+a x^4}}{b+a x} \, dx=-\frac {21945 \, a^{5} \left (\frac {b^{20}}{a^{23}}\right )^{\frac {1}{4}} \log \left (\frac {4389 \, {\left (a^{6} x \left (\frac {b^{20}}{a^{23}}\right )^{\frac {1}{4}} + {\left (a x^{4} + b x^{3}\right )}^{\frac {1}{4}} b^{5}\right )}}{x}\right ) - 21945 \, a^{5} \left (\frac {b^{20}}{a^{23}}\right )^{\frac {1}{4}} \log \left (-\frac {4389 \, {\left (a^{6} x \left (\frac {b^{20}}{a^{23}}\right )^{\frac {1}{4}} - {\left (a x^{4} + b x^{3}\right )}^{\frac {1}{4}} b^{5}\right )}}{x}\right ) - 21945 i \, a^{5} \left (\frac {b^{20}}{a^{23}}\right )^{\frac {1}{4}} \log \left (-\frac {4389 \, {\left (i \, a^{6} x \left (\frac {b^{20}}{a^{23}}\right )^{\frac {1}{4}} - {\left (a x^{4} + b x^{3}\right )}^{\frac {1}{4}} b^{5}\right )}}{x}\right ) + 21945 i \, a^{5} \left (\frac {b^{20}}{a^{23}}\right )^{\frac {1}{4}} \log \left (-\frac {4389 \, {\left (-i \, a^{6} x \left (\frac {b^{20}}{a^{23}}\right )^{\frac {1}{4}} - {\left (a x^{4} + b x^{3}\right )}^{\frac {1}{4}} b^{5}\right )}}{x}\right ) - 4 \, {\left (2048 \, a^{4} x^{4} - 2432 \, a^{3} b x^{3} + 3040 \, a^{2} b^{2} x^{2} - 4180 \, a b^{3} x + 7315 \, b^{4}\right )} {\left (a x^{4} + b x^{3}\right )}^{\frac {1}{4}}}{40960 \, a^{5}} \]
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\[ \int \frac {x^4 \sqrt [4]{b x^3+a x^4}}{b+a x} \, dx=\int \frac {x^{4} \sqrt [4]{x^{3} \left (a x + b\right )}}{a x + b}\, dx \]
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\[ \int \frac {x^4 \sqrt [4]{b x^3+a x^4}}{b+a x} \, dx=\int { \frac {{\left (a x^{4} + b x^{3}\right )}^{\frac {1}{4}} x^{4}}{a x + b} \,d x } \]
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Leaf count of result is larger than twice the leaf count of optimal. 295 vs. \(2 (114) = 228\).
Time = 0.29 (sec) , antiderivative size = 295, normalized size of antiderivative = 2.20 \[ \int \frac {x^4 \sqrt [4]{b x^3+a x^4}}{b+a x} \, dx=-\frac {\frac {43890 \, \sqrt {2} \left (-a\right )^{\frac {1}{4}} b^{6} \arctan \left (\frac {\sqrt {2} {\left (\sqrt {2} \left (-a\right )^{\frac {1}{4}} + 2 \, {\left (a + \frac {b}{x}\right )}^{\frac {1}{4}}\right )}}{2 \, \left (-a\right )^{\frac {1}{4}}}\right )}{a^{6}} + \frac {43890 \, \sqrt {2} \left (-a\right )^{\frac {1}{4}} b^{6} \arctan \left (-\frac {\sqrt {2} {\left (\sqrt {2} \left (-a\right )^{\frac {1}{4}} - 2 \, {\left (a + \frac {b}{x}\right )}^{\frac {1}{4}}\right )}}{2 \, \left (-a\right )^{\frac {1}{4}}}\right )}{a^{6}} + \frac {21945 \, \sqrt {2} \left (-a\right )^{\frac {1}{4}} b^{6} \log \left (\sqrt {2} \left (-a\right )^{\frac {1}{4}} {\left (a + \frac {b}{x}\right )}^{\frac {1}{4}} + \sqrt {-a} + \sqrt {a + \frac {b}{x}}\right )}{a^{6}} + \frac {21945 \, \sqrt {2} b^{6} \log \left (-\sqrt {2} \left (-a\right )^{\frac {1}{4}} {\left (a + \frac {b}{x}\right )}^{\frac {1}{4}} + \sqrt {-a} + \sqrt {a + \frac {b}{x}}\right )}{\left (-a\right )^{\frac {3}{4}} a^{5}} - \frac {8 \, {\left (7315 \, {\left (a + \frac {b}{x}\right )}^{\frac {17}{4}} b^{6} - 33440 \, {\left (a + \frac {b}{x}\right )}^{\frac {13}{4}} a b^{6} + 59470 \, {\left (a + \frac {b}{x}\right )}^{\frac {9}{4}} a^{2} b^{6} - 50312 \, {\left (a + \frac {b}{x}\right )}^{\frac {5}{4}} a^{3} b^{6} + 19015 \, {\left (a + \frac {b}{x}\right )}^{\frac {1}{4}} a^{4} b^{6}\right )} x^{5}}{a^{5} b^{5}}}{81920 \, b} \]
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Timed out. \[ \int \frac {x^4 \sqrt [4]{b x^3+a x^4}}{b+a x} \, dx=\int \frac {x^4\,{\left (a\,x^4+b\,x^3\right )}^{1/4}}{b+a\,x} \,d x \]
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