Integrand size = 21, antiderivative size = 156 \[ \int \frac {1}{(c+d x)^3 \left (a+b (c+d x)^3\right )} \, dx=-\frac {1}{2 a d (c+d x)^2}+\frac {b^{2/3} \arctan \left (\frac {\sqrt [3]{a}-2 \sqrt [3]{b} (c+d x)}{\sqrt {3} \sqrt [3]{a}}\right )}{\sqrt {3} a^{5/3} d}-\frac {b^{2/3} \log \left (\sqrt [3]{a}+\sqrt [3]{b} (c+d x)\right )}{3 a^{5/3} d}+\frac {b^{2/3} \log \left (a^{2/3}-\sqrt [3]{a} \sqrt [3]{b} (c+d x)+b^{2/3} (c+d x)^2\right )}{6 a^{5/3} d} \]
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Time = 0.10 (sec) , antiderivative size = 156, normalized size of antiderivative = 1.00, number of steps used = 8, number of rules used = 8, \(\frac {\text {number of rules}}{\text {integrand size}}\) = 0.381, Rules used = {379, 331, 206, 31, 648, 631, 210, 642} \[ \int \frac {1}{(c+d x)^3 \left (a+b (c+d x)^3\right )} \, dx=\frac {b^{2/3} \arctan \left (\frac {\sqrt [3]{a}-2 \sqrt [3]{b} (c+d x)}{\sqrt {3} \sqrt [3]{a}}\right )}{\sqrt {3} a^{5/3} d}-\frac {b^{2/3} \log \left (\sqrt [3]{a}+\sqrt [3]{b} (c+d x)\right )}{3 a^{5/3} d}+\frac {b^{2/3} \log \left (a^{2/3}-\sqrt [3]{a} \sqrt [3]{b} (c+d x)+b^{2/3} (c+d x)^2\right )}{6 a^{5/3} d}-\frac {1}{2 a d (c+d x)^2} \]
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Rule 31
Rule 206
Rule 210
Rule 331
Rule 379
Rule 631
Rule 642
Rule 648
Rubi steps \begin{align*} \text {integral}& = \frac {\text {Subst}\left (\int \frac {1}{x^3 \left (a+b x^3\right )} \, dx,x,c+d x\right )}{d} \\ & = -\frac {1}{2 a d (c+d x)^2}-\frac {b \text {Subst}\left (\int \frac {1}{a+b x^3} \, dx,x,c+d x\right )}{a d} \\ & = -\frac {1}{2 a d (c+d x)^2}-\frac {b \text {Subst}\left (\int \frac {1}{\sqrt [3]{a}+\sqrt [3]{b} x} \, dx,x,c+d x\right )}{3 a^{5/3} d}-\frac {b \text {Subst}\left (\int \frac {2 \sqrt [3]{a}-\sqrt [3]{b} x}{a^{2/3}-\sqrt [3]{a} \sqrt [3]{b} x+b^{2/3} x^2} \, dx,x,c+d x\right )}{3 a^{5/3} d} \\ & = -\frac {1}{2 a d (c+d x)^2}-\frac {b^{2/3} \log \left (\sqrt [3]{a}+\sqrt [3]{b} (c+d x)\right )}{3 a^{5/3} d}+\frac {b^{2/3} \text {Subst}\left (\int \frac {-\sqrt [3]{a} \sqrt [3]{b}+2 b^{2/3} x}{a^{2/3}-\sqrt [3]{a} \sqrt [3]{b} x+b^{2/3} x^2} \, dx,x,c+d x\right )}{6 a^{5/3} d}-\frac {b \text {Subst}\left (\int \frac {1}{a^{2/3}-\sqrt [3]{a} \sqrt [3]{b} x+b^{2/3} x^2} \, dx,x,c+d x\right )}{2 a^{4/3} d} \\ & = -\frac {1}{2 a d (c+d x)^2}-\frac {b^{2/3} \log \left (\sqrt [3]{a}+\sqrt [3]{b} (c+d x)\right )}{3 a^{5/3} d}+\frac {b^{2/3} \log \left (a^{2/3}-\sqrt [3]{a} \sqrt [3]{b} (c+d x)+b^{2/3} (c+d x)^2\right )}{6 a^{5/3} d}-\frac {b^{2/3} \text {Subst}\left (\int \frac {1}{-3-x^2} \, dx,x,1-\frac {2 \sqrt [3]{b} (c+d x)}{\sqrt [3]{a}}\right )}{a^{5/3} d} \\ & = -\frac {1}{2 a d (c+d x)^2}+\frac {b^{2/3} \tan ^{-1}\left (\frac {1-\frac {2 \sqrt [3]{b} (c+d x)}{\sqrt [3]{a}}}{\sqrt {3}}\right )}{\sqrt {3} a^{5/3} d}-\frac {b^{2/3} \log \left (\sqrt [3]{a}+\sqrt [3]{b} (c+d x)\right )}{3 a^{5/3} d}+\frac {b^{2/3} \log \left (a^{2/3}-\sqrt [3]{a} \sqrt [3]{b} (c+d x)+b^{2/3} (c+d x)^2\right )}{6 a^{5/3} d} \\ \end{align*}
Time = 0.04 (sec) , antiderivative size = 139, normalized size of antiderivative = 0.89 \[ \int \frac {1}{(c+d x)^3 \left (a+b (c+d x)^3\right )} \, dx=\frac {-\frac {3 a^{2/3}}{(c+d x)^2}-2 \sqrt {3} b^{2/3} \arctan \left (\frac {-\sqrt [3]{a}+2 \sqrt [3]{b} (c+d x)}{\sqrt {3} \sqrt [3]{a}}\right )-2 b^{2/3} \log \left (\sqrt [3]{a}+\sqrt [3]{b} (c+d x)\right )+b^{2/3} \log \left (a^{2/3}-\sqrt [3]{a} \sqrt [3]{b} (c+d x)+b^{2/3} (c+d x)^2\right )}{6 a^{5/3} d} \]
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Result contains higher order function than in optimal. Order 9 vs. order 3.
Time = 3.96 (sec) , antiderivative size = 87, normalized size of antiderivative = 0.56
method | result | size |
default | \(-\frac {1}{2 a d \left (d x +c \right )^{2}}-\frac {\munderset {\textit {\_R} =\operatorname {RootOf}\left (b \,d^{3} \textit {\_Z}^{3}+3 b c \,d^{2} \textit {\_Z}^{2}+3 b \,c^{2} d \textit {\_Z} +c^{3} b +a \right )}{\sum }\frac {\ln \left (x -\textit {\_R} \right )}{d^{2} \textit {\_R}^{2}+2 c d \textit {\_R} +c^{2}}}{3 d a}\) | \(87\) |
risch | \(-\frac {1}{2 a d \left (d x +c \right )^{2}}+\frac {\left (\munderset {\textit {\_R} =\operatorname {RootOf}\left (a^{5} d^{3} \textit {\_Z}^{3}+b^{2}\right )}{\sum }\textit {\_R} \ln \left (\left (-4 a^{5} d^{4} \textit {\_R}^{3}-3 b^{2} d \right ) x -4 a^{5} c \,d^{3} \textit {\_R}^{3}-a^{2} b d \textit {\_R} -3 b^{2} c \right )\right )}{3}\) | \(87\) |
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Time = 0.27 (sec) , antiderivative size = 236, normalized size of antiderivative = 1.51 \[ \int \frac {1}{(c+d x)^3 \left (a+b (c+d x)^3\right )} \, dx=\frac {2 \, \sqrt {3} {\left (d^{2} x^{2} + 2 \, c d x + c^{2}\right )} \left (-\frac {b^{2}}{a^{2}}\right )^{\frac {1}{3}} \arctan \left (\frac {2 \, \sqrt {3} {\left (a d x + a c\right )} \left (-\frac {b^{2}}{a^{2}}\right )^{\frac {2}{3}} - \sqrt {3} b}{3 \, b}\right ) - {\left (d^{2} x^{2} + 2 \, c d x + c^{2}\right )} \left (-\frac {b^{2}}{a^{2}}\right )^{\frac {1}{3}} \log \left (b^{2} d^{2} x^{2} + 2 \, b^{2} c d x + b^{2} c^{2} + a^{2} \left (-\frac {b^{2}}{a^{2}}\right )^{\frac {2}{3}} + {\left (a b d x + a b c\right )} \left (-\frac {b^{2}}{a^{2}}\right )^{\frac {1}{3}}\right ) + 2 \, {\left (d^{2} x^{2} + 2 \, c d x + c^{2}\right )} \left (-\frac {b^{2}}{a^{2}}\right )^{\frac {1}{3}} \log \left (b d x + b c - a \left (-\frac {b^{2}}{a^{2}}\right )^{\frac {1}{3}}\right ) - 3}{6 \, {\left (a d^{3} x^{2} + 2 \, a c d^{2} x + a c^{2} d\right )}} \]
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Time = 0.42 (sec) , antiderivative size = 61, normalized size of antiderivative = 0.39 \[ \int \frac {1}{(c+d x)^3 \left (a+b (c+d x)^3\right )} \, dx=- \frac {1}{2 a c^{2} d + 4 a c d^{2} x + 2 a d^{3} x^{2}} + \frac {\operatorname {RootSum} {\left (27 t^{3} a^{5} + b^{2}, \left ( t \mapsto t \log {\left (x + \frac {- 3 t a^{2} + b c}{b d} \right )} \right )\right )}}{d} \]
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\[ \int \frac {1}{(c+d x)^3 \left (a+b (c+d x)^3\right )} \, dx=\int { \frac {1}{{\left ({\left (d x + c\right )}^{3} b + a\right )} {\left (d x + c\right )}^{3}} \,d x } \]
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Time = 0.30 (sec) , antiderivative size = 193, normalized size of antiderivative = 1.24 \[ \int \frac {1}{(c+d x)^3 \left (a+b (c+d x)^3\right )} \, dx=\frac {2 \, \sqrt {3} \left (-\frac {b^{2}}{a^{2} d^{3}}\right )^{\frac {1}{3}} \arctan \left (-\frac {b d x + b c - \left (-a b^{2}\right )^{\frac {1}{3}}}{\sqrt {3} b d x + \sqrt {3} b c + \sqrt {3} \left (-a b^{2}\right )^{\frac {1}{3}}}\right ) - \left (-\frac {b^{2}}{a^{2} d^{3}}\right )^{\frac {1}{3}} \log \left (4 \, {\left (\sqrt {3} b d x + \sqrt {3} b c + \sqrt {3} \left (-a b^{2}\right )^{\frac {1}{3}}\right )}^{2} + 4 \, {\left (b d x + b c - \left (-a b^{2}\right )^{\frac {1}{3}}\right )}^{2}\right ) + 2 \, \left (-\frac {b^{2}}{a^{2} d^{3}}\right )^{\frac {1}{3}} \log \left ({\left | -b d x - b c + \left (-a b^{2}\right )^{\frac {1}{3}} \right |}\right )}{6 \, a} - \frac {1}{2 \, {\left (d x + c\right )}^{2} a d} \]
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Time = 0.34 (sec) , antiderivative size = 201, normalized size of antiderivative = 1.29 \[ \int \frac {1}{(c+d x)^3 \left (a+b (c+d x)^3\right )} \, dx=\frac {b^{2/3}\,\ln \left (a^2\,b^{1/3}\,c-{\left (-a\right )}^{7/3}+a^2\,b^{1/3}\,d\,x\right )}{3\,{\left (-a\right )}^{5/3}\,d}-\frac {1}{2\,a\,d\,\left (c^2+2\,c\,d\,x+d^2\,x^2\right )}-\frac {b^{2/3}\,\ln \left (3\,a^2\,b^3\,c\,d^5+3\,a^2\,b^3\,d^6\,x+3\,{\left (-a\right )}^{7/3}\,b^{8/3}\,d^5\,\left (\frac {1}{2}+\frac {\sqrt {3}\,1{}\mathrm {i}}{2}\right )\right )\,\left (\frac {1}{2}+\frac {\sqrt {3}\,1{}\mathrm {i}}{2}\right )}{3\,{\left (-a\right )}^{5/3}\,d}+\frac {b^{2/3}\,\ln \left (3\,a^2\,b^3\,c\,d^5+3\,a^2\,b^3\,d^6\,x-9\,{\left (-a\right )}^{7/3}\,b^{8/3}\,d^5\,\left (-\frac {1}{6}+\frac {\sqrt {3}\,1{}\mathrm {i}}{6}\right )\right )\,\left (-\frac {1}{6}+\frac {\sqrt {3}\,1{}\mathrm {i}}{6}\right )}{{\left (-a\right )}^{5/3}\,d} \]
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