Integrand size = 13, antiderivative size = 82 \[ \int \frac {\sinh ^3(x)}{a+b \sinh (x)} \, dx=\frac {\left (2 a^2-b^2\right ) x}{2 b^3}+\frac {2 a^3 \text {arctanh}\left (\frac {b-a \tanh \left (\frac {x}{2}\right )}{\sqrt {a^2+b^2}}\right )}{b^3 \sqrt {a^2+b^2}}-\frac {a \cosh (x)}{b^2}+\frac {\cosh (x) \sinh (x)}{2 b} \]
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Time = 0.13 (sec) , antiderivative size = 82, normalized size of antiderivative = 1.00, number of steps used = 6, number of rules used = 6, \(\frac {\text {number of rules}}{\text {integrand size}}\) = 0.462, Rules used = {2872, 3102, 2814, 2739, 632, 212} \[ \int \frac {\sinh ^3(x)}{a+b \sinh (x)} \, dx=\frac {x \left (2 a^2-b^2\right )}{2 b^3}+\frac {2 a^3 \text {arctanh}\left (\frac {b-a \tanh \left (\frac {x}{2}\right )}{\sqrt {a^2+b^2}}\right )}{b^3 \sqrt {a^2+b^2}}-\frac {a \cosh (x)}{b^2}+\frac {\sinh (x) \cosh (x)}{2 b} \]
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Rule 212
Rule 632
Rule 2739
Rule 2814
Rule 2872
Rule 3102
Rubi steps \begin{align*} \text {integral}& = \frac {\cosh (x) \sinh (x)}{2 b}-\frac {\int \frac {a+b \sinh (x)+2 a \sinh ^2(x)}{a+b \sinh (x)} \, dx}{2 b} \\ & = -\frac {a \cosh (x)}{b^2}+\frac {\cosh (x) \sinh (x)}{2 b}-\frac {i \int \frac {-i a b+i \left (2 a^2-b^2\right ) \sinh (x)}{a+b \sinh (x)} \, dx}{2 b^2} \\ & = \frac {\left (2 a^2-b^2\right ) x}{2 b^3}-\frac {a \cosh (x)}{b^2}+\frac {\cosh (x) \sinh (x)}{2 b}-\frac {a^3 \int \frac {1}{a+b \sinh (x)} \, dx}{b^3} \\ & = \frac {\left (2 a^2-b^2\right ) x}{2 b^3}-\frac {a \cosh (x)}{b^2}+\frac {\cosh (x) \sinh (x)}{2 b}-\frac {\left (2 a^3\right ) \text {Subst}\left (\int \frac {1}{a+2 b x-a x^2} \, dx,x,\tanh \left (\frac {x}{2}\right )\right )}{b^3} \\ & = \frac {\left (2 a^2-b^2\right ) x}{2 b^3}-\frac {a \cosh (x)}{b^2}+\frac {\cosh (x) \sinh (x)}{2 b}+\frac {\left (4 a^3\right ) \text {Subst}\left (\int \frac {1}{4 \left (a^2+b^2\right )-x^2} \, dx,x,2 b-2 a \tanh \left (\frac {x}{2}\right )\right )}{b^3} \\ & = \frac {\left (2 a^2-b^2\right ) x}{2 b^3}+\frac {2 a^3 \text {arctanh}\left (\frac {b-a \tanh \left (\frac {x}{2}\right )}{\sqrt {a^2+b^2}}\right )}{b^3 \sqrt {a^2+b^2}}-\frac {a \cosh (x)}{b^2}+\frac {\cosh (x) \sinh (x)}{2 b} \\ \end{align*}
Time = 0.93 (sec) , antiderivative size = 82, normalized size of antiderivative = 1.00 \[ \int \frac {\sinh ^3(x)}{a+b \sinh (x)} \, dx=\frac {4 a^2 x-2 b^2 x-\frac {8 a^3 \arctan \left (\frac {b-a \tanh \left (\frac {x}{2}\right )}{\sqrt {-a^2-b^2}}\right )}{\sqrt {-a^2-b^2}}-4 a b \cosh (x)+b^2 \sinh (2 x)}{4 b^3} \]
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Leaf count of result is larger than twice the leaf count of optimal. \(151\) vs. \(2(72)=144\).
Time = 0.58 (sec) , antiderivative size = 152, normalized size of antiderivative = 1.85
method | result | size |
default | \(-\frac {1}{2 b \left (\tanh \left (\frac {x}{2}\right )+1\right )^{2}}-\frac {-b +2 a}{2 b^{2} \left (\tanh \left (\frac {x}{2}\right )+1\right )}+\frac {\left (2 a^{2}-b^{2}\right ) \ln \left (\tanh \left (\frac {x}{2}\right )+1\right )}{2 b^{3}}+\frac {1}{2 b \left (\tanh \left (\frac {x}{2}\right )-1\right )^{2}}-\frac {-b -2 a}{2 b^{2} \left (\tanh \left (\frac {x}{2}\right )-1\right )}+\frac {\left (-2 a^{2}+b^{2}\right ) \ln \left (\tanh \left (\frac {x}{2}\right )-1\right )}{2 b^{3}}-\frac {2 a^{3} \operatorname {arctanh}\left (\frac {2 a \tanh \left (\frac {x}{2}\right )-2 b}{2 \sqrt {a^{2}+b^{2}}}\right )}{b^{3} \sqrt {a^{2}+b^{2}}}\) | \(152\) |
risch | \(\frac {x \,a^{2}}{b^{3}}-\frac {x}{2 b}+\frac {{\mathrm e}^{2 x}}{8 b}-\frac {a \,{\mathrm e}^{x}}{2 b^{2}}-\frac {a \,{\mathrm e}^{-x}}{2 b^{2}}-\frac {{\mathrm e}^{-2 x}}{8 b}+\frac {a^{3} \ln \left ({\mathrm e}^{x}+\frac {a \sqrt {a^{2}+b^{2}}+a^{2}+b^{2}}{\sqrt {a^{2}+b^{2}}\, b}\right )}{\sqrt {a^{2}+b^{2}}\, b^{3}}-\frac {a^{3} \ln \left ({\mathrm e}^{x}+\frac {a \sqrt {a^{2}+b^{2}}-a^{2}-b^{2}}{\sqrt {a^{2}+b^{2}}\, b}\right )}{\sqrt {a^{2}+b^{2}}\, b^{3}}\) | \(159\) |
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Leaf count of result is larger than twice the leaf count of optimal. 459 vs. \(2 (74) = 148\).
Time = 0.30 (sec) , antiderivative size = 459, normalized size of antiderivative = 5.60 \[ \int \frac {\sinh ^3(x)}{a+b \sinh (x)} \, dx=\frac {{\left (a^{2} b^{2} + b^{4}\right )} \cosh \left (x\right )^{4} + {\left (a^{2} b^{2} + b^{4}\right )} \sinh \left (x\right )^{4} - a^{2} b^{2} - b^{4} + 4 \, {\left (2 \, a^{4} + a^{2} b^{2} - b^{4}\right )} x \cosh \left (x\right )^{2} - 4 \, {\left (a^{3} b + a b^{3}\right )} \cosh \left (x\right )^{3} - 4 \, {\left (a^{3} b + a b^{3} - {\left (a^{2} b^{2} + b^{4}\right )} \cosh \left (x\right )\right )} \sinh \left (x\right )^{3} + 2 \, {\left (3 \, {\left (a^{2} b^{2} + b^{4}\right )} \cosh \left (x\right )^{2} + 2 \, {\left (2 \, a^{4} + a^{2} b^{2} - b^{4}\right )} x - 6 \, {\left (a^{3} b + a b^{3}\right )} \cosh \left (x\right )\right )} \sinh \left (x\right )^{2} + 8 \, {\left (a^{3} \cosh \left (x\right )^{2} + 2 \, a^{3} \cosh \left (x\right ) \sinh \left (x\right ) + a^{3} \sinh \left (x\right )^{2}\right )} \sqrt {a^{2} + b^{2}} \log \left (\frac {b^{2} \cosh \left (x\right )^{2} + b^{2} \sinh \left (x\right )^{2} + 2 \, a b \cosh \left (x\right ) + 2 \, a^{2} + b^{2} + 2 \, {\left (b^{2} \cosh \left (x\right ) + a b\right )} \sinh \left (x\right ) + 2 \, \sqrt {a^{2} + b^{2}} {\left (b \cosh \left (x\right ) + b \sinh \left (x\right ) + a\right )}}{b \cosh \left (x\right )^{2} + b \sinh \left (x\right )^{2} + 2 \, a \cosh \left (x\right ) + 2 \, {\left (b \cosh \left (x\right ) + a\right )} \sinh \left (x\right ) - b}\right ) - 4 \, {\left (a^{3} b + a b^{3}\right )} \cosh \left (x\right ) - 4 \, {\left (a^{3} b + a b^{3} - {\left (a^{2} b^{2} + b^{4}\right )} \cosh \left (x\right )^{3} - 2 \, {\left (2 \, a^{4} + a^{2} b^{2} - b^{4}\right )} x \cosh \left (x\right ) + 3 \, {\left (a^{3} b + a b^{3}\right )} \cosh \left (x\right )^{2}\right )} \sinh \left (x\right )}{8 \, {\left ({\left (a^{2} b^{3} + b^{5}\right )} \cosh \left (x\right )^{2} + 2 \, {\left (a^{2} b^{3} + b^{5}\right )} \cosh \left (x\right ) \sinh \left (x\right ) + {\left (a^{2} b^{3} + b^{5}\right )} \sinh \left (x\right )^{2}\right )}} \]
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Timed out. \[ \int \frac {\sinh ^3(x)}{a+b \sinh (x)} \, dx=\text {Timed out} \]
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Time = 0.27 (sec) , antiderivative size = 118, normalized size of antiderivative = 1.44 \[ \int \frac {\sinh ^3(x)}{a+b \sinh (x)} \, dx=-\frac {a^{3} \log \left (\frac {b e^{\left (-x\right )} - a - \sqrt {a^{2} + b^{2}}}{b e^{\left (-x\right )} - a + \sqrt {a^{2} + b^{2}}}\right )}{\sqrt {a^{2} + b^{2}} b^{3}} - \frac {{\left (4 \, a e^{\left (-x\right )} - b\right )} e^{\left (2 \, x\right )}}{8 \, b^{2}} - \frac {4 \, a e^{\left (-x\right )} + b e^{\left (-2 \, x\right )}}{8 \, b^{2}} + \frac {{\left (2 \, a^{2} - b^{2}\right )} x}{2 \, b^{3}} \]
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Time = 0.27 (sec) , antiderivative size = 117, normalized size of antiderivative = 1.43 \[ \int \frac {\sinh ^3(x)}{a+b \sinh (x)} \, dx=-\frac {a^{3} \log \left (\frac {{\left | 2 \, b e^{x} + 2 \, a - 2 \, \sqrt {a^{2} + b^{2}} \right |}}{{\left | 2 \, b e^{x} + 2 \, a + 2 \, \sqrt {a^{2} + b^{2}} \right |}}\right )}{\sqrt {a^{2} + b^{2}} b^{3}} + \frac {b e^{\left (2 \, x\right )} - 4 \, a e^{x}}{8 \, b^{2}} + \frac {{\left (2 \, a^{2} - b^{2}\right )} x}{2 \, b^{3}} - \frac {{\left (4 \, a b e^{x} + b^{2}\right )} e^{\left (-2 \, x\right )}}{8 \, b^{3}} \]
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Time = 1.35 (sec) , antiderivative size = 159, normalized size of antiderivative = 1.94 \[ \int \frac {\sinh ^3(x)}{a+b \sinh (x)} \, dx=\frac {{\mathrm {e}}^{2\,x}}{8\,b}-\frac {{\mathrm {e}}^{-2\,x}}{8\,b}+\frac {x\,\left (2\,a^2-b^2\right )}{2\,b^3}-\frac {a\,{\mathrm {e}}^x}{2\,b^2}-\frac {a\,{\mathrm {e}}^{-x}}{2\,b^2}-\frac {a^3\,\ln \left (\frac {2\,a^3\,{\mathrm {e}}^x}{b^4}-\frac {2\,a^3\,\left (b-a\,{\mathrm {e}}^x\right )}{b^4\,\sqrt {a^2+b^2}}\right )}{b^3\,\sqrt {a^2+b^2}}+\frac {a^3\,\ln \left (\frac {2\,a^3\,{\mathrm {e}}^x}{b^4}+\frac {2\,a^3\,\left (b-a\,{\mathrm {e}}^x\right )}{b^4\,\sqrt {a^2+b^2}}\right )}{b^3\,\sqrt {a^2+b^2}} \]
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