Integrand size = 14, antiderivative size = 152 \[ \int \frac {e^x}{(a-\tanh (2 x))^2} \, dx=\frac {e^x}{(1-a)^2}+\frac {e^x}{(1-a)^2 (1+a) \left (1+a+(-1+a) e^{4 x}\right )}-\frac {(1+4 a) \arctan \left (\frac {\sqrt [4]{1-a} e^x}{\sqrt [4]{1+a}}\right )}{2 (1-a)^2 (1+a)^{3/2} \sqrt [4]{1-a^2}}-\frac {(1+4 a) \text {arctanh}\left (\frac {\sqrt [4]{1-a} e^x}{\sqrt [4]{1+a}}\right )}{2 (1-a)^2 (1+a)^{3/2} \sqrt [4]{1-a^2}} \]
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Time = 0.14 (sec) , antiderivative size = 152, normalized size of antiderivative = 1.00, number of steps used = 7, number of rules used = 6, \(\frac {\text {number of rules}}{\text {integrand size}}\) = 0.429, Rules used = {2320, 398, 393, 218, 214, 211} \[ \int \frac {e^x}{(a-\tanh (2 x))^2} \, dx=-\frac {(4 a+1) \arctan \left (\frac {\sqrt [4]{1-a} e^x}{\sqrt [4]{a+1}}\right )}{2 (1-a)^2 (a+1)^{3/2} \sqrt [4]{1-a^2}}-\frac {(4 a+1) \text {arctanh}\left (\frac {\sqrt [4]{1-a} e^x}{\sqrt [4]{a+1}}\right )}{2 (1-a)^2 (a+1)^{3/2} \sqrt [4]{1-a^2}}+\frac {e^x}{(1-a)^2}+\frac {e^x}{(1-a)^2 (a+1) \left ((a-1) e^{4 x}+a+1\right )} \]
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Rule 211
Rule 214
Rule 218
Rule 393
Rule 398
Rule 2320
Rubi steps \begin{align*} \text {integral}& = \text {Subst}\left (\int \frac {\left (1+x^4\right )^2}{\left (1+a-(1-a) x^4\right )^2} \, dx,x,e^x\right ) \\ & = \text {Subst}\left (\int \left (\frac {1}{(-1+a)^2}-\frac {4 \left (a-(1-a) x^4\right )}{(-1+a)^2 \left (1+a+(-1+a) x^4\right )^2}\right ) \, dx,x,e^x\right ) \\ & = \frac {e^x}{(1-a)^2}-\frac {4 \text {Subst}\left (\int \frac {a-(1-a) x^4}{\left (1+a+(-1+a) x^4\right )^2} \, dx,x,e^x\right )}{(1-a)^2} \\ & = \frac {e^x}{(1-a)^2}+\frac {e^x}{(1-a)^2 (1+a) \left (1+a-(1-a) e^{4 x}\right )}-\frac {(1+4 a) \text {Subst}\left (\int \frac {1}{1+a+(-1+a) x^4} \, dx,x,e^x\right )}{(1-a)^2 (1+a)} \\ & = \frac {e^x}{(1-a)^2}+\frac {e^x}{(1-a)^2 (1+a) \left (1+a-(1-a) e^{4 x}\right )}-\frac {(1+4 a) \text {Subst}\left (\int \frac {1}{\sqrt {1+a}-\sqrt {1-a} x^2} \, dx,x,e^x\right )}{2 (1-a)^2 (1+a)^{3/2}}-\frac {(1+4 a) \text {Subst}\left (\int \frac {1}{\sqrt {1+a}+\sqrt {1-a} x^2} \, dx,x,e^x\right )}{2 (1-a)^2 (1+a)^{3/2}} \\ & = \frac {e^x}{(1-a)^2}+\frac {e^x}{(1-a)^2 (1+a) \left (1+a-(1-a) e^{4 x}\right )}-\frac {(1+4 a) \arctan \left (\frac {\sqrt [4]{1-a} e^x}{\sqrt [4]{1+a}}\right )}{2 (1-a)^2 (1+a)^{3/2} \sqrt [4]{1-a^2}}-\frac {(1+4 a) \text {arctanh}\left (\frac {\sqrt [4]{1-a} e^x}{\sqrt [4]{1+a}}\right )}{2 (1-a)^2 (1+a)^{3/2} \sqrt [4]{1-a^2}} \\ \end{align*}
Result contains higher order function than in optimal. Order 9 vs. order 3 in optimal.
Time = 0.20 (sec) , antiderivative size = 107, normalized size of antiderivative = 0.70 \[ \int \frac {e^x}{(a-\tanh (2 x))^2} \, dx=\frac {\frac {4 (-1+a) e^x \left (2+2 a-e^{4 x}+a^2 \left (1+e^{4 x}\right )\right )}{1+a-e^{4 x}+a e^{4 x}}+(1+4 a) \text {RootSum}\left [1+a-\text {$\#$1}^4+a \text {$\#$1}^4\&,\frac {x-\log \left (e^x-\text {$\#$1}\right )}{\text {$\#$1}^3}\&\right ]}{4 (-1+a)^3 (1+a)} \]
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Result contains higher order function than in optimal. Order 9 vs. order 3.
Time = 0.40 (sec) , antiderivative size = 191, normalized size of antiderivative = 1.26
method | result | size |
default | \(-\frac {2}{\left (-1+a \right )^{2} \left (\tanh \left (\frac {x}{2}\right )-1\right )}-\frac {2 \left (\frac {-\frac {\left (a -2\right ) \tanh \left (\frac {x}{2}\right )^{3}}{2 a \left (a +1\right )}-\frac {3 \tanh \left (\frac {x}{2}\right )^{2}}{2 \left (a +1\right )}+\frac {\left (a +2\right ) \tanh \left (\frac {x}{2}\right )}{2 a \left (a +1\right )}-\frac {1}{2 \left (a +1\right )}}{\tanh \left (\frac {x}{2}\right )^{4} a +6 \tanh \left (\frac {x}{2}\right )^{2} a -4 \tanh \left (\frac {x}{2}\right )^{3}+a -4 \tanh \left (\frac {x}{2}\right )}+\frac {\left (1+4 a \right ) \left (\munderset {\textit {\_R} =\operatorname {RootOf}\left (a \,\textit {\_Z}^{4}-4 \textit {\_Z}^{3}+6 a \,\textit {\_Z}^{2}-4 \textit {\_Z} +a \right )}{\sum }\frac {\left (\textit {\_R}^{2}-2 \textit {\_R} +1\right ) \ln \left (\tanh \left (\frac {x}{2}\right )-\textit {\_R} \right )}{\textit {\_R}^{3} a -3 \textit {\_R}^{2}+3 \textit {\_R} a -1}\right )}{8 a +8}\right )}{\left (-1+a \right )^{2}}\) | \(191\) |
risch | \(\frac {{\mathrm e}^{x}}{a^{2}-2 a +1}+\frac {{\mathrm e}^{x}}{\left (a +1\right ) \left (a^{2}-2 a +1\right ) \left (a \,{\mathrm e}^{4 x}-{\mathrm e}^{4 x}+a +1\right )}+\left (\munderset {\textit {\_R} =\operatorname {RootOf}\left (\left (256 a^{16}-512 a^{15}-1536 a^{14}+3584 a^{13}+3584 a^{12}-10752 a^{11}-3584 a^{10}+17920 a^{9}-17920 a^{7}+3584 a^{6}+10752 a^{5}-3584 a^{4}-3584 a^{3}+1536 a^{2}+512 a -256\right ) \textit {\_Z}^{4}+256 a^{4}+256 a^{3}+96 a^{2}+16 a +1\right )}{\sum }\textit {\_R} \ln \left ({\mathrm e}^{x}+\frac {\left (-\frac {4 a^{4}}{1+4 a}+\frac {8 a^{2}}{1+4 a}-\frac {4}{1+4 a}\right ) \textit {\_R}}{\frac {4 a}{1+4 a}+\frac {1}{1+4 a}}\right )\right )\) | \(215\) |
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Result contains complex when optimal does not.
Time = 0.28 (sec) , antiderivative size = 1604, normalized size of antiderivative = 10.55 \[ \int \frac {e^x}{(a-\tanh (2 x))^2} \, dx=\text {Too large to display} \]
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\[ \int \frac {e^x}{(a-\tanh (2 x))^2} \, dx=\int \frac {e^{x}}{\left (a - \tanh {\left (2 x \right )}\right )^{2}}\, dx \]
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Exception generated. \[ \int \frac {e^x}{(a-\tanh (2 x))^2} \, dx=\text {Exception raised: ValueError} \]
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Leaf count of result is larger than twice the leaf count of optimal. 456 vs. \(2 (119) = 238\).
Time = 0.27 (sec) , antiderivative size = 456, normalized size of antiderivative = 3.00 \[ \int \frac {e^x}{(a-\tanh (2 x))^2} \, dx=-\frac {{\left (a^{4} - 2 \, a^{3} + 2 \, a - 1\right )}^{\frac {1}{4}} {\left (4 \, a + 1\right )} \arctan \left (\frac {\sqrt {2} {\left (\sqrt {2} \left (\frac {a + 1}{a - 1}\right )^{\frac {1}{4}} + 2 \, e^{x}\right )}}{2 \, \left (\frac {a + 1}{a - 1}\right )^{\frac {1}{4}}}\right )}{2 \, {\left (\sqrt {2} a^{5} - \sqrt {2} a^{4} - 2 \, \sqrt {2} a^{3} + 2 \, \sqrt {2} a^{2} + \sqrt {2} a - \sqrt {2}\right )}} - \frac {{\left (a^{4} - 2 \, a^{3} + 2 \, a - 1\right )}^{\frac {1}{4}} {\left (4 \, a + 1\right )} \arctan \left (-\frac {\sqrt {2} {\left (\sqrt {2} \left (\frac {a + 1}{a - 1}\right )^{\frac {1}{4}} - 2 \, e^{x}\right )}}{2 \, \left (\frac {a + 1}{a - 1}\right )^{\frac {1}{4}}}\right )}{2 \, {\left (\sqrt {2} a^{5} - \sqrt {2} a^{4} - 2 \, \sqrt {2} a^{3} + 2 \, \sqrt {2} a^{2} + \sqrt {2} a - \sqrt {2}\right )}} - \frac {{\left (a^{4} - 2 \, a^{3} + 2 \, a - 1\right )}^{\frac {1}{4}} {\left (4 \, a + 1\right )} \log \left (\sqrt {2} \left (\frac {a + 1}{a - 1}\right )^{\frac {1}{4}} e^{x} + \sqrt {\frac {a + 1}{a - 1}} + e^{\left (2 \, x\right )}\right )}{4 \, {\left (\sqrt {2} a^{5} - \sqrt {2} a^{4} - 2 \, \sqrt {2} a^{3} + 2 \, \sqrt {2} a^{2} + \sqrt {2} a - \sqrt {2}\right )}} + \frac {{\left (a^{4} - 2 \, a^{3} + 2 \, a - 1\right )}^{\frac {1}{4}} {\left (4 \, a + 1\right )} \log \left (-\sqrt {2} \left (\frac {a + 1}{a - 1}\right )^{\frac {1}{4}} e^{x} + \sqrt {\frac {a + 1}{a - 1}} + e^{\left (2 \, x\right )}\right )}{4 \, {\left (\sqrt {2} a^{5} - \sqrt {2} a^{4} - 2 \, \sqrt {2} a^{3} + 2 \, \sqrt {2} a^{2} + \sqrt {2} a - \sqrt {2}\right )}} + \frac {e^{x}}{a^{2} - 2 \, a + 1} + \frac {e^{x}}{{\left (a^{3} - a^{2} - a + 1\right )} {\left (a e^{\left (4 \, x\right )} + a - e^{\left (4 \, x\right )} + 1\right )}} \]
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Time = 23.13 (sec) , antiderivative size = 280, normalized size of antiderivative = 1.84 \[ \int \frac {e^x}{(a-\tanh (2 x))^2} \, dx=\frac {{\mathrm {e}}^x}{{\left (a-1\right )}^2}+\frac {\ln \left (\frac {4\,a+1}{{\left (a-1\right )}^{13/4}\,{\left (-a-1\right )}^{3/4}}+\frac {{\mathrm {e}}^x\,\left (4\,a+1\right )}{a^4-2\,a^3+2\,a-1}\right )\,\left (4\,a+1\right )}{4\,{\left (a-1\right )}^{9/4}\,{\left (-a-1\right )}^{7/4}}-\frac {\ln \left (\frac {{\mathrm {e}}^x\,\left (4\,a+1\right )}{a^4-2\,a^3+2\,a-1}-\frac {4\,a+1}{{\left (a-1\right )}^{13/4}\,{\left (-a-1\right )}^{3/4}}\right )\,\left (4\,a+1\right )}{4\,{\left (a-1\right )}^{9/4}\,{\left (-a-1\right )}^{7/4}}+\frac {{\mathrm {e}}^x}{{\left (a-1\right )}^2\,\left (a+1\right )\,\left (a+{\mathrm {e}}^{4\,x}\,\left (a-1\right )+1\right )}-\frac {\ln \left (\frac {{\mathrm {e}}^x\,\left (4\,a+1\right )}{{\left (a-1\right )}^3\,\left (a+1\right )}-\frac {\left (4\,a+1\right )\,1{}\mathrm {i}}{{\left (a-1\right )}^{13/4}\,{\left (-a-1\right )}^{3/4}}\right )\,\left (4\,a+1\right )\,1{}\mathrm {i}}{4\,{\left (a-1\right )}^{9/4}\,{\left (-a-1\right )}^{7/4}}+\frac {\ln \left (\frac {{\mathrm {e}}^x\,\left (4\,a+1\right )}{{\left (a-1\right )}^3\,\left (a+1\right )}+\frac {\left (4\,a+1\right )\,1{}\mathrm {i}}{{\left (a-1\right )}^{13/4}\,{\left (-a-1\right )}^{3/4}}\right )\,\left (4\,a+1\right )\,1{}\mathrm {i}}{4\,{\left (a-1\right )}^{9/4}\,{\left (-a-1\right )}^{7/4}} \]
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