Integrand size = 17, antiderivative size = 356 \[ \int \frac {x^3}{a+b (c+d x)^4} \, dx=\frac {3 c^2 \arctan \left (\frac {\sqrt {b} (c+d x)^2}{\sqrt {a}}\right )}{2 \sqrt {a} \sqrt {b} d^4}+\frac {c \left (3 \sqrt {a}+\sqrt {b} c^2\right ) \arctan \left (1-\frac {\sqrt {2} \sqrt [4]{b} (c+d x)}{\sqrt [4]{a}}\right )}{2 \sqrt {2} a^{3/4} b^{3/4} d^4}-\frac {c \left (3 \sqrt {a}+\sqrt {b} c^2\right ) \arctan \left (1+\frac {\sqrt {2} \sqrt [4]{b} (c+d x)}{\sqrt [4]{a}}\right )}{2 \sqrt {2} a^{3/4} b^{3/4} d^4}-\frac {c \left (3 \sqrt {a}-\sqrt {b} c^2\right ) \log \left (\sqrt {a}-\sqrt {2} \sqrt [4]{a} \sqrt [4]{b} (c+d x)+\sqrt {b} (c+d x)^2\right )}{4 \sqrt {2} a^{3/4} b^{3/4} d^4}+\frac {c \left (3 \sqrt {a}-\sqrt {b} c^2\right ) \log \left (\sqrt {a}+\sqrt {2} \sqrt [4]{a} \sqrt [4]{b} (c+d x)+\sqrt {b} (c+d x)^2\right )}{4 \sqrt {2} a^{3/4} b^{3/4} d^4}+\frac {\log \left (a+b (c+d x)^4\right )}{4 b d^4} \]
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Time = 0.30 (sec) , antiderivative size = 356, normalized size of antiderivative = 1.00, number of steps used = 16, number of rules used = 12, \(\frac {\text {number of rules}}{\text {integrand size}}\) = 0.706, Rules used = {378, 1890, 1262, 649, 211, 266, 1182, 1176, 631, 210, 1179, 642} \[ \int \frac {x^3}{a+b (c+d x)^4} \, dx=\frac {c \left (3 \sqrt {a}+\sqrt {b} c^2\right ) \arctan \left (1-\frac {\sqrt {2} \sqrt [4]{b} (c+d x)}{\sqrt [4]{a}}\right )}{2 \sqrt {2} a^{3/4} b^{3/4} d^4}-\frac {c \left (3 \sqrt {a}+\sqrt {b} c^2\right ) \arctan \left (\frac {\sqrt {2} \sqrt [4]{b} (c+d x)}{\sqrt [4]{a}}+1\right )}{2 \sqrt {2} a^{3/4} b^{3/4} d^4}-\frac {c \left (3 \sqrt {a}-\sqrt {b} c^2\right ) \log \left (-\sqrt {2} \sqrt [4]{a} \sqrt [4]{b} (c+d x)+\sqrt {a}+\sqrt {b} (c+d x)^2\right )}{4 \sqrt {2} a^{3/4} b^{3/4} d^4}+\frac {c \left (3 \sqrt {a}-\sqrt {b} c^2\right ) \log \left (\sqrt {2} \sqrt [4]{a} \sqrt [4]{b} (c+d x)+\sqrt {a}+\sqrt {b} (c+d x)^2\right )}{4 \sqrt {2} a^{3/4} b^{3/4} d^4}+\frac {3 c^2 \arctan \left (\frac {\sqrt {b} (c+d x)^2}{\sqrt {a}}\right )}{2 \sqrt {a} \sqrt {b} d^4}+\frac {\log \left (a+b (c+d x)^4\right )}{4 b d^4} \]
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Rule 210
Rule 211
Rule 266
Rule 378
Rule 631
Rule 642
Rule 649
Rule 1176
Rule 1179
Rule 1182
Rule 1262
Rule 1890
Rubi steps \begin{align*} \text {integral}& = \frac {\text {Subst}\left (\int \frac {(-c+x)^3}{a+b x^4} \, dx,x,c+d x\right )}{d^4} \\ & = \frac {\text {Subst}\left (\int \left (\frac {x \left (3 c^2+x^2\right )}{a+b x^4}+\frac {-c^3-3 c x^2}{a+b x^4}\right ) \, dx,x,c+d x\right )}{d^4} \\ & = \frac {\text {Subst}\left (\int \frac {x \left (3 c^2+x^2\right )}{a+b x^4} \, dx,x,c+d x\right )}{d^4}+\frac {\text {Subst}\left (\int \frac {-c^3-3 c x^2}{a+b x^4} \, dx,x,c+d x\right )}{d^4} \\ & = \frac {\text {Subst}\left (\int \frac {3 c^2+x}{a+b x^2} \, dx,x,(c+d x)^2\right )}{2 d^4}+\frac {\left (c \left (3-\frac {\sqrt {b} c^2}{\sqrt {a}}\right )\right ) \text {Subst}\left (\int \frac {\sqrt {a} \sqrt {b}-b x^2}{a+b x^4} \, dx,x,c+d x\right )}{2 b d^4}-\frac {\left (c \left (3+\frac {\sqrt {b} c^2}{\sqrt {a}}\right )\right ) \text {Subst}\left (\int \frac {\sqrt {a} \sqrt {b}+b x^2}{a+b x^4} \, dx,x,c+d x\right )}{2 b d^4} \\ & = \frac {\text {Subst}\left (\int \frac {x}{a+b x^2} \, dx,x,(c+d x)^2\right )}{2 d^4}+\frac {\left (3 c^2\right ) \text {Subst}\left (\int \frac {1}{a+b x^2} \, dx,x,(c+d x)^2\right )}{2 d^4}-\frac {\left (c \left (3 \sqrt {a}-\sqrt {b} c^2\right )\right ) \text {Subst}\left (\int \frac {\frac {\sqrt {2} \sqrt [4]{a}}{\sqrt [4]{b}}+2 x}{-\frac {\sqrt {a}}{\sqrt {b}}-\frac {\sqrt {2} \sqrt [4]{a} x}{\sqrt [4]{b}}-x^2} \, dx,x,c+d x\right )}{4 \sqrt {2} a^{3/4} b^{3/4} d^4}-\frac {\left (c \left (3 \sqrt {a}-\sqrt {b} c^2\right )\right ) \text {Subst}\left (\int \frac {\frac {\sqrt {2} \sqrt [4]{a}}{\sqrt [4]{b}}-2 x}{-\frac {\sqrt {a}}{\sqrt {b}}+\frac {\sqrt {2} \sqrt [4]{a} x}{\sqrt [4]{b}}-x^2} \, dx,x,c+d x\right )}{4 \sqrt {2} a^{3/4} b^{3/4} d^4}-\frac {\left (c \left (3+\frac {\sqrt {b} c^2}{\sqrt {a}}\right )\right ) \text {Subst}\left (\int \frac {1}{\frac {\sqrt {a}}{\sqrt {b}}-\frac {\sqrt {2} \sqrt [4]{a} x}{\sqrt [4]{b}}+x^2} \, dx,x,c+d x\right )}{4 b d^4}-\frac {\left (c \left (3+\frac {\sqrt {b} c^2}{\sqrt {a}}\right )\right ) \text {Subst}\left (\int \frac {1}{\frac {\sqrt {a}}{\sqrt {b}}+\frac {\sqrt {2} \sqrt [4]{a} x}{\sqrt [4]{b}}+x^2} \, dx,x,c+d x\right )}{4 b d^4} \\ & = \frac {3 c^2 \tan ^{-1}\left (\frac {\sqrt {b} (c+d x)^2}{\sqrt {a}}\right )}{2 \sqrt {a} \sqrt {b} d^4}-\frac {c \left (3 \sqrt {a}-\sqrt {b} c^2\right ) \log \left (\sqrt {a}-\sqrt {2} \sqrt [4]{a} \sqrt [4]{b} (c+d x)+\sqrt {b} (c+d x)^2\right )}{4 \sqrt {2} a^{3/4} b^{3/4} d^4}+\frac {c \left (3 \sqrt {a}-\sqrt {b} c^2\right ) \log \left (\sqrt {a}+\sqrt {2} \sqrt [4]{a} \sqrt [4]{b} (c+d x)+\sqrt {b} (c+d x)^2\right )}{4 \sqrt {2} a^{3/4} b^{3/4} d^4}+\frac {\log \left (a+b (c+d x)^4\right )}{4 b d^4}-\frac {\left (c \left (3 \sqrt {a}+\sqrt {b} c^2\right )\right ) \text {Subst}\left (\int \frac {1}{-1-x^2} \, dx,x,1-\frac {\sqrt {2} \sqrt [4]{b} (c+d x)}{\sqrt [4]{a}}\right )}{2 \sqrt {2} a^{3/4} b^{3/4} d^4}+\frac {\left (c \left (3 \sqrt {a}+\sqrt {b} c^2\right )\right ) \text {Subst}\left (\int \frac {1}{-1-x^2} \, dx,x,1+\frac {\sqrt {2} \sqrt [4]{b} (c+d x)}{\sqrt [4]{a}}\right )}{2 \sqrt {2} a^{3/4} b^{3/4} d^4} \\ & = \frac {3 c^2 \tan ^{-1}\left (\frac {\sqrt {b} (c+d x)^2}{\sqrt {a}}\right )}{2 \sqrt {a} \sqrt {b} d^4}+\frac {c \left (3 \sqrt {a}+\sqrt {b} c^2\right ) \tan ^{-1}\left (1-\frac {\sqrt {2} \sqrt [4]{b} (c+d x)}{\sqrt [4]{a}}\right )}{2 \sqrt {2} a^{3/4} b^{3/4} d^4}-\frac {c \left (3 \sqrt {a}+\sqrt {b} c^2\right ) \tan ^{-1}\left (1+\frac {\sqrt {2} \sqrt [4]{b} (c+d x)}{\sqrt [4]{a}}\right )}{2 \sqrt {2} a^{3/4} b^{3/4} d^4}-\frac {c \left (3 \sqrt {a}-\sqrt {b} c^2\right ) \log \left (\sqrt {a}-\sqrt {2} \sqrt [4]{a} \sqrt [4]{b} (c+d x)+\sqrt {b} (c+d x)^2\right )}{4 \sqrt {2} a^{3/4} b^{3/4} d^4}+\frac {c \left (3 \sqrt {a}-\sqrt {b} c^2\right ) \log \left (\sqrt {a}+\sqrt {2} \sqrt [4]{a} \sqrt [4]{b} (c+d x)+\sqrt {b} (c+d x)^2\right )}{4 \sqrt {2} a^{3/4} b^{3/4} d^4}+\frac {\log \left (a+b (c+d x)^4\right )}{4 b d^4} \\ \end{align*}
Result contains higher order function than in optimal. Order 9 vs. order 3 in optimal.
Time = 0.03 (sec) , antiderivative size = 106, normalized size of antiderivative = 0.30 \[ \int \frac {x^3}{a+b (c+d x)^4} \, dx=\frac {\text {RootSum}\left [a+b c^4+4 b c^3 d \text {$\#$1}+6 b c^2 d^2 \text {$\#$1}^2+4 b c d^3 \text {$\#$1}^3+b d^4 \text {$\#$1}^4\&,\frac {\log (x-\text {$\#$1}) \text {$\#$1}^3}{c^3+3 c^2 d \text {$\#$1}+3 c d^2 \text {$\#$1}^2+d^3 \text {$\#$1}^3}\&\right ]}{4 b d} \]
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Result contains higher order function than in optimal. Order 9 vs. order 3.
Time = 0.10 (sec) , antiderivative size = 97, normalized size of antiderivative = 0.27
method | result | size |
default | \(\frac {\munderset {\textit {\_R} =\operatorname {RootOf}\left (b \,d^{4} \textit {\_Z}^{4}+4 b c \,d^{3} \textit {\_Z}^{3}+6 b \,c^{2} d^{2} \textit {\_Z}^{2}+4 b \,c^{3} d \textit {\_Z} +b \,c^{4}+a \right )}{\sum }\frac {\textit {\_R}^{3} \ln \left (x -\textit {\_R} \right )}{d^{3} \textit {\_R}^{3}+3 c \,d^{2} \textit {\_R}^{2}+3 c^{2} d \textit {\_R} +c^{3}}}{4 b d}\) | \(97\) |
risch | \(\frac {\munderset {\textit {\_R} =\operatorname {RootOf}\left (b \,d^{4} \textit {\_Z}^{4}+4 b c \,d^{3} \textit {\_Z}^{3}+6 b \,c^{2} d^{2} \textit {\_Z}^{2}+4 b \,c^{3} d \textit {\_Z} +b \,c^{4}+a \right )}{\sum }\frac {\textit {\_R}^{3} \ln \left (x -\textit {\_R} \right )}{d^{3} \textit {\_R}^{3}+3 c \,d^{2} \textit {\_R}^{2}+3 c^{2} d \textit {\_R} +c^{3}}}{4 b d}\) | \(97\) |
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Timed out. \[ \int \frac {x^3}{a+b (c+d x)^4} \, dx=\text {Timed out} \]
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Time = 2.24 (sec) , antiderivative size = 374, normalized size of antiderivative = 1.05 \[ \int \frac {x^3}{a+b (c+d x)^4} \, dx=\operatorname {RootSum} {\left (256 t^{4} a^{3} b^{4} d^{16} - 256 t^{3} a^{3} b^{3} d^{12} + t^{2} \cdot \left (96 a^{3} b^{2} d^{8} + 480 a^{2} b^{3} c^{4} d^{8}\right ) + t \left (- 16 a^{3} b d^{4} + 192 a^{2} b^{2} c^{4} d^{4} - 48 a b^{3} c^{8} d^{4}\right ) + a^{3} + 3 a^{2} b c^{4} + 3 a b^{2} c^{8} + b^{3} c^{12}, \left ( t \mapsto t \log {\left (x + \frac {- 1728 t^{3} a^{4} b^{3} d^{12} - 960 t^{3} a^{3} b^{4} c^{4} d^{12} + 1296 t^{2} a^{4} b^{2} d^{8} + 2016 t^{2} a^{3} b^{3} c^{4} d^{8} - 48 t^{2} a^{2} b^{4} c^{8} d^{8} - 324 t a^{4} b d^{4} - 4716 t a^{3} b^{2} c^{4} d^{4} - 1452 t a^{2} b^{3} c^{8} d^{4} - 4 t a b^{4} c^{12} d^{4} + 27 a^{4} - 390 a^{3} b c^{4} - 444 a^{2} b^{2} c^{8} - 26 a b^{3} c^{12} + b^{4} c^{16}}{729 a^{3} b c^{3} d - 1053 a^{2} b^{2} c^{7} d - 117 a b^{3} c^{11} d + b^{4} c^{15} d} \right )} \right )\right )} \]
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\[ \int \frac {x^3}{a+b (c+d x)^4} \, dx=\int { \frac {x^{3}}{{\left (d x + c\right )}^{4} b + a} \,d x } \]
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\[ \int \frac {x^3}{a+b (c+d x)^4} \, dx=\int { \frac {x^{3}}{{\left (d x + c\right )}^{4} b + a} \,d x } \]
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Time = 9.62 (sec) , antiderivative size = 1003, normalized size of antiderivative = 2.82 \[ \int \frac {x^3}{a+b (c+d x)^4} \, dx=\sum _{k=1}^4\ln \left (b\,c^2\,d\,\left (2\,a\,c+2\,b\,c^5-3\,a\,d\,x+5\,b\,c^4\,d\,x-\mathrm {root}\left (256\,a^3\,b^4\,d^{16}\,z^4-256\,a^3\,b^3\,d^{12}\,z^3+480\,a^2\,b^3\,c^4\,d^8\,z^2+96\,a^3\,b^2\,d^8\,z^2+192\,a^2\,b^2\,c^4\,d^4\,z-48\,a\,b^3\,c^8\,d^4\,z-16\,a^3\,b\,d^4\,z+3\,a\,b^2\,c^8+3\,a^2\,b\,c^4+b^3\,c^{12}+a^3,z,k\right )\,b^2\,c^5\,d^4\,2+{\mathrm {root}\left (256\,a^3\,b^4\,d^{16}\,z^4-256\,a^3\,b^3\,d^{12}\,z^3+480\,a^2\,b^3\,c^4\,d^8\,z^2+96\,a^3\,b^2\,d^8\,z^2+192\,a^2\,b^2\,c^4\,d^4\,z-48\,a\,b^3\,c^8\,d^4\,z-16\,a^3\,b\,d^4\,z+3\,a\,b^2\,c^8+3\,a^2\,b\,c^4+b^3\,c^{12}+a^3,z,k\right )}^2\,a\,b^2\,c\,d^8\,32+{\mathrm {root}\left (256\,a^3\,b^4\,d^{16}\,z^4-256\,a^3\,b^3\,d^{12}\,z^3+480\,a^2\,b^3\,c^4\,d^8\,z^2+96\,a^3\,b^2\,d^8\,z^2+192\,a^2\,b^2\,c^4\,d^4\,z-48\,a\,b^3\,c^8\,d^4\,z-16\,a^3\,b\,d^4\,z+3\,a\,b^2\,c^8+3\,a^2\,b\,c^4+b^3\,c^{12}+a^3,z,k\right )}^2\,a\,b^2\,d^9\,x\,24-\mathrm {root}\left (256\,a^3\,b^4\,d^{16}\,z^4-256\,a^3\,b^3\,d^{12}\,z^3+480\,a^2\,b^3\,c^4\,d^8\,z^2+96\,a^3\,b^2\,d^8\,z^2+192\,a^2\,b^2\,c^4\,d^4\,z-48\,a\,b^3\,c^8\,d^4\,z-16\,a^3\,b\,d^4\,z+3\,a\,b^2\,c^8+3\,a^2\,b\,c^4+b^3\,c^{12}+a^3,z,k\right )\,b^2\,c^4\,d^5\,x\,2+\mathrm {root}\left (256\,a^3\,b^4\,d^{16}\,z^4-256\,a^3\,b^3\,d^{12}\,z^3+480\,a^2\,b^3\,c^4\,d^8\,z^2+96\,a^3\,b^2\,d^8\,z^2+192\,a^2\,b^2\,c^4\,d^4\,z-48\,a\,b^3\,c^8\,d^4\,z-16\,a^3\,b\,d^4\,z+3\,a\,b^2\,c^8+3\,a^2\,b\,c^4+b^3\,c^{12}+a^3,z,k\right )\,a\,b\,c\,d^4\,38+\mathrm {root}\left (256\,a^3\,b^4\,d^{16}\,z^4-256\,a^3\,b^3\,d^{12}\,z^3+480\,a^2\,b^3\,c^4\,d^8\,z^2+96\,a^3\,b^2\,d^8\,z^2+192\,a^2\,b^2\,c^4\,d^4\,z-48\,a\,b^3\,c^8\,d^4\,z-16\,a^3\,b\,d^4\,z+3\,a\,b^2\,c^8+3\,a^2\,b\,c^4+b^3\,c^{12}+a^3,z,k\right )\,a\,b\,d^5\,x\,6\right )\,2\right )\,\mathrm {root}\left (256\,a^3\,b^4\,d^{16}\,z^4-256\,a^3\,b^3\,d^{12}\,z^3+480\,a^2\,b^3\,c^4\,d^8\,z^2+96\,a^3\,b^2\,d^8\,z^2+192\,a^2\,b^2\,c^4\,d^4\,z-48\,a\,b^3\,c^8\,d^4\,z-16\,a^3\,b\,d^4\,z+3\,a\,b^2\,c^8+3\,a^2\,b\,c^4+b^3\,c^{12}+a^3,z,k\right ) \]
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