Integrand size = 19, antiderivative size = 270 \[ \int \frac {\cosh (c+d x)}{x^3 \left (a+b x^2\right )} \, dx=-\frac {\cosh (c+d x)}{2 a x^2}-\frac {b \cosh (c) \text {Chi}(d x)}{a^2}+\frac {d^2 \cosh (c) \text {Chi}(d x)}{2 a}+\frac {b \cosh \left (c+\frac {\sqrt {-a} d}{\sqrt {b}}\right ) \text {Chi}\left (\frac {\sqrt {-a} d}{\sqrt {b}}-d x\right )}{2 a^2}+\frac {b \cosh \left (c-\frac {\sqrt {-a} d}{\sqrt {b}}\right ) \text {Chi}\left (\frac {\sqrt {-a} d}{\sqrt {b}}+d x\right )}{2 a^2}-\frac {d \sinh (c+d x)}{2 a x}-\frac {b \sinh (c) \text {Shi}(d x)}{a^2}+\frac {d^2 \sinh (c) \text {Shi}(d x)}{2 a}-\frac {b \sinh \left (c+\frac {\sqrt {-a} d}{\sqrt {b}}\right ) \text {Shi}\left (\frac {\sqrt {-a} d}{\sqrt {b}}-d x\right )}{2 a^2}+\frac {b \sinh \left (c-\frac {\sqrt {-a} d}{\sqrt {b}}\right ) \text {Shi}\left (\frac {\sqrt {-a} d}{\sqrt {b}}+d x\right )}{2 a^2} \]
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Time = 0.40 (sec) , antiderivative size = 270, normalized size of antiderivative = 1.00, number of steps used = 18, number of rules used = 5, \(\frac {\text {number of rules}}{\text {integrand size}}\) = 0.263, Rules used = {5401, 3378, 3384, 3379, 3382} \[ \int \frac {\cosh (c+d x)}{x^3 \left (a+b x^2\right )} \, dx=-\frac {b \cosh (c) \text {Chi}(d x)}{a^2}+\frac {b \cosh \left (\frac {\sqrt {-a} d}{\sqrt {b}}+c\right ) \text {Chi}\left (\frac {\sqrt {-a} d}{\sqrt {b}}-d x\right )}{2 a^2}+\frac {b \cosh \left (c-\frac {\sqrt {-a} d}{\sqrt {b}}\right ) \text {Chi}\left (x d+\frac {\sqrt {-a} d}{\sqrt {b}}\right )}{2 a^2}-\frac {b \sinh (c) \text {Shi}(d x)}{a^2}-\frac {b \sinh \left (\frac {\sqrt {-a} d}{\sqrt {b}}+c\right ) \text {Shi}\left (\frac {\sqrt {-a} d}{\sqrt {b}}-d x\right )}{2 a^2}+\frac {b \sinh \left (c-\frac {\sqrt {-a} d}{\sqrt {b}}\right ) \text {Shi}\left (x d+\frac {\sqrt {-a} d}{\sqrt {b}}\right )}{2 a^2}+\frac {d^2 \cosh (c) \text {Chi}(d x)}{2 a}+\frac {d^2 \sinh (c) \text {Shi}(d x)}{2 a}-\frac {\cosh (c+d x)}{2 a x^2}-\frac {d \sinh (c+d x)}{2 a x} \]
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Rule 3378
Rule 3379
Rule 3382
Rule 3384
Rule 5401
Rubi steps \begin{align*} \text {integral}& = \int \left (\frac {\cosh (c+d x)}{a x^3}-\frac {b \cosh (c+d x)}{a^2 x}+\frac {b^2 x \cosh (c+d x)}{a^2 \left (a+b x^2\right )}\right ) \, dx \\ & = \frac {\int \frac {\cosh (c+d x)}{x^3} \, dx}{a}-\frac {b \int \frac {\cosh (c+d x)}{x} \, dx}{a^2}+\frac {b^2 \int \frac {x \cosh (c+d x)}{a+b x^2} \, dx}{a^2} \\ & = -\frac {\cosh (c+d x)}{2 a x^2}+\frac {b^2 \int \left (-\frac {\cosh (c+d x)}{2 \sqrt {b} \left (\sqrt {-a}-\sqrt {b} x\right )}+\frac {\cosh (c+d x)}{2 \sqrt {b} \left (\sqrt {-a}+\sqrt {b} x\right )}\right ) \, dx}{a^2}+\frac {d \int \frac {\sinh (c+d x)}{x^2} \, dx}{2 a}-\frac {(b \cosh (c)) \int \frac {\cosh (d x)}{x} \, dx}{a^2}-\frac {(b \sinh (c)) \int \frac {\sinh (d x)}{x} \, dx}{a^2} \\ & = -\frac {\cosh (c+d x)}{2 a x^2}-\frac {b \cosh (c) \text {Chi}(d x)}{a^2}-\frac {d \sinh (c+d x)}{2 a x}-\frac {b \sinh (c) \text {Shi}(d x)}{a^2}-\frac {b^{3/2} \int \frac {\cosh (c+d x)}{\sqrt {-a}-\sqrt {b} x} \, dx}{2 a^2}+\frac {b^{3/2} \int \frac {\cosh (c+d x)}{\sqrt {-a}+\sqrt {b} x} \, dx}{2 a^2}+\frac {d^2 \int \frac {\cosh (c+d x)}{x} \, dx}{2 a} \\ & = -\frac {\cosh (c+d x)}{2 a x^2}-\frac {b \cosh (c) \text {Chi}(d x)}{a^2}-\frac {d \sinh (c+d x)}{2 a x}-\frac {b \sinh (c) \text {Shi}(d x)}{a^2}+\frac {\left (d^2 \cosh (c)\right ) \int \frac {\cosh (d x)}{x} \, dx}{2 a}+\frac {\left (b^{3/2} \cosh \left (c-\frac {\sqrt {-a} d}{\sqrt {b}}\right )\right ) \int \frac {\cosh \left (\frac {\sqrt {-a} d}{\sqrt {b}}+d x\right )}{\sqrt {-a}+\sqrt {b} x} \, dx}{2 a^2}-\frac {\left (b^{3/2} \cosh \left (c+\frac {\sqrt {-a} d}{\sqrt {b}}\right )\right ) \int \frac {\cosh \left (\frac {\sqrt {-a} d}{\sqrt {b}}-d x\right )}{\sqrt {-a}-\sqrt {b} x} \, dx}{2 a^2}+\frac {\left (d^2 \sinh (c)\right ) \int \frac {\sinh (d x)}{x} \, dx}{2 a}+\frac {\left (b^{3/2} \sinh \left (c-\frac {\sqrt {-a} d}{\sqrt {b}}\right )\right ) \int \frac {\sinh \left (\frac {\sqrt {-a} d}{\sqrt {b}}+d x\right )}{\sqrt {-a}+\sqrt {b} x} \, dx}{2 a^2}+\frac {\left (b^{3/2} \sinh \left (c+\frac {\sqrt {-a} d}{\sqrt {b}}\right )\right ) \int \frac {\sinh \left (\frac {\sqrt {-a} d}{\sqrt {b}}-d x\right )}{\sqrt {-a}-\sqrt {b} x} \, dx}{2 a^2} \\ & = -\frac {\cosh (c+d x)}{2 a x^2}-\frac {b \cosh (c) \text {Chi}(d x)}{a^2}+\frac {d^2 \cosh (c) \text {Chi}(d x)}{2 a}+\frac {b \cosh \left (c+\frac {\sqrt {-a} d}{\sqrt {b}}\right ) \text {Chi}\left (\frac {\sqrt {-a} d}{\sqrt {b}}-d x\right )}{2 a^2}+\frac {b \cosh \left (c-\frac {\sqrt {-a} d}{\sqrt {b}}\right ) \text {Chi}\left (\frac {\sqrt {-a} d}{\sqrt {b}}+d x\right )}{2 a^2}-\frac {d \sinh (c+d x)}{2 a x}-\frac {b \sinh (c) \text {Shi}(d x)}{a^2}+\frac {d^2 \sinh (c) \text {Shi}(d x)}{2 a}-\frac {b \sinh \left (c+\frac {\sqrt {-a} d}{\sqrt {b}}\right ) \text {Shi}\left (\frac {\sqrt {-a} d}{\sqrt {b}}-d x\right )}{2 a^2}+\frac {b \sinh \left (c-\frac {\sqrt {-a} d}{\sqrt {b}}\right ) \text {Shi}\left (\frac {\sqrt {-a} d}{\sqrt {b}}+d x\right )}{2 a^2} \\ \end{align*}
Result contains complex when optimal does not.
Time = 0.80 (sec) , antiderivative size = 232, normalized size of antiderivative = 0.86 \[ \int \frac {\cosh (c+d x)}{x^3 \left (a+b x^2\right )} \, dx=\frac {b e^{c-\frac {i \sqrt {a} d}{\sqrt {b}}} \left (e^{\frac {2 i \sqrt {a} d}{\sqrt {b}}} \operatorname {ExpIntegralEi}\left (d \left (-\frac {i \sqrt {a}}{\sqrt {b}}+x\right )\right )+\operatorname {ExpIntegralEi}\left (d \left (\frac {i \sqrt {a}}{\sqrt {b}}+x\right )\right )\right )+b e^{-c-\frac {i \sqrt {a} d}{\sqrt {b}}} \left (e^{\frac {2 i \sqrt {a} d}{\sqrt {b}}} \operatorname {ExpIntegralEi}\left (-\frac {i \sqrt {a} d}{\sqrt {b}}-d x\right )+\operatorname {ExpIntegralEi}\left (\frac {i \sqrt {a} d}{\sqrt {b}}-d x\right )\right )-\frac {2 a \cosh (d x) (\cosh (c)+d x \sinh (c))}{x^2}-\frac {2 a (d x \cosh (c)+\sinh (c)) \sinh (d x)}{x^2}+2 \left (-2 b+a d^2\right ) (\cosh (c) \text {Chi}(d x)+\sinh (c) \text {Shi}(d x))}{4 a^2} \]
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Time = 0.28 (sec) , antiderivative size = 330, normalized size of antiderivative = 1.22
method | result | size |
risch | \(\frac {d \,{\mathrm e}^{-d x -c}}{4 a x}-\frac {{\mathrm e}^{-d x -c}}{4 a \,x^{2}}-\frac {b \,{\mathrm e}^{-\frac {d \sqrt {-a b}+c b}{b}} \operatorname {Ei}_{1}\left (-\frac {d \sqrt {-a b}-\left (d x +c \right ) b +c b}{b}\right )}{4 a^{2}}-\frac {b \,{\mathrm e}^{-\frac {-d \sqrt {-a b}+c b}{b}} \operatorname {Ei}_{1}\left (\frac {d \sqrt {-a b}+\left (d x +c \right ) b -c b}{b}\right )}{4 a^{2}}-\frac {d^{2} {\mathrm e}^{-c} \operatorname {Ei}_{1}\left (d x \right )}{4 a}+\frac {{\mathrm e}^{-c} \operatorname {Ei}_{1}\left (d x \right ) b}{2 a^{2}}-\frac {d \,{\mathrm e}^{d x +c}}{4 a x}-\frac {{\mathrm e}^{d x +c}}{4 a \,x^{2}}-\frac {b \,{\mathrm e}^{\frac {d \sqrt {-a b}+c b}{b}} \operatorname {Ei}_{1}\left (\frac {d \sqrt {-a b}-\left (d x +c \right ) b +c b}{b}\right )}{4 a^{2}}-\frac {b \,{\mathrm e}^{\frac {-d \sqrt {-a b}+c b}{b}} \operatorname {Ei}_{1}\left (-\frac {d \sqrt {-a b}+\left (d x +c \right ) b -c b}{b}\right )}{4 a^{2}}-\frac {d^{2} {\mathrm e}^{c} \operatorname {Ei}_{1}\left (-d x \right )}{4 a}+\frac {{\mathrm e}^{c} \operatorname {Ei}_{1}\left (-d x \right ) b}{2 a^{2}}\) | \(330\) |
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Leaf count of result is larger than twice the leaf count of optimal. 583 vs. \(2 (222) = 444\).
Time = 0.28 (sec) , antiderivative size = 583, normalized size of antiderivative = 2.16 \[ \int \frac {\cosh (c+d x)}{x^3 \left (a+b x^2\right )} \, dx=-\frac {2 \, a d x \sinh \left (d x + c\right ) + 2 \, a \cosh \left (d x + c\right ) - {\left ({\left (b x^{2} \cosh \left (d x + c\right )^{2} - b x^{2} \sinh \left (d x + c\right )^{2}\right )} {\rm Ei}\left (d x - \sqrt {-\frac {a d^{2}}{b}}\right ) + {\left (b x^{2} \cosh \left (d x + c\right )^{2} - b x^{2} \sinh \left (d x + c\right )^{2}\right )} {\rm Ei}\left (-d x + \sqrt {-\frac {a d^{2}}{b}}\right )\right )} \cosh \left (c + \sqrt {-\frac {a d^{2}}{b}}\right ) - {\left ({\left (a d^{2} - 2 \, b\right )} x^{2} {\rm Ei}\left (d x\right ) + {\left (a d^{2} - 2 \, b\right )} x^{2} {\rm Ei}\left (-d x\right )\right )} \cosh \left (c\right ) - {\left ({\left (b x^{2} \cosh \left (d x + c\right )^{2} - b x^{2} \sinh \left (d x + c\right )^{2}\right )} {\rm Ei}\left (d x + \sqrt {-\frac {a d^{2}}{b}}\right ) + {\left (b x^{2} \cosh \left (d x + c\right )^{2} - b x^{2} \sinh \left (d x + c\right )^{2}\right )} {\rm Ei}\left (-d x - \sqrt {-\frac {a d^{2}}{b}}\right )\right )} \cosh \left (-c + \sqrt {-\frac {a d^{2}}{b}}\right ) - {\left ({\left (b x^{2} \cosh \left (d x + c\right )^{2} - b x^{2} \sinh \left (d x + c\right )^{2}\right )} {\rm Ei}\left (d x - \sqrt {-\frac {a d^{2}}{b}}\right ) - {\left (b x^{2} \cosh \left (d x + c\right )^{2} - b x^{2} \sinh \left (d x + c\right )^{2}\right )} {\rm Ei}\left (-d x + \sqrt {-\frac {a d^{2}}{b}}\right )\right )} \sinh \left (c + \sqrt {-\frac {a d^{2}}{b}}\right ) - {\left ({\left (a d^{2} - 2 \, b\right )} x^{2} {\rm Ei}\left (d x\right ) - {\left (a d^{2} - 2 \, b\right )} x^{2} {\rm Ei}\left (-d x\right )\right )} \sinh \left (c\right ) + {\left ({\left (b x^{2} \cosh \left (d x + c\right )^{2} - b x^{2} \sinh \left (d x + c\right )^{2}\right )} {\rm Ei}\left (d x + \sqrt {-\frac {a d^{2}}{b}}\right ) - {\left (b x^{2} \cosh \left (d x + c\right )^{2} - b x^{2} \sinh \left (d x + c\right )^{2}\right )} {\rm Ei}\left (-d x - \sqrt {-\frac {a d^{2}}{b}}\right )\right )} \sinh \left (-c + \sqrt {-\frac {a d^{2}}{b}}\right )}{4 \, {\left (a^{2} x^{2} \cosh \left (d x + c\right )^{2} - a^{2} x^{2} \sinh \left (d x + c\right )^{2}\right )}} \]
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\[ \int \frac {\cosh (c+d x)}{x^3 \left (a+b x^2\right )} \, dx=\int \frac {\cosh {\left (c + d x \right )}}{x^{3} \left (a + b x^{2}\right )}\, dx \]
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\[ \int \frac {\cosh (c+d x)}{x^3 \left (a+b x^2\right )} \, dx=\int { \frac {\cosh \left (d x + c\right )}{{\left (b x^{2} + a\right )} x^{3}} \,d x } \]
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\[ \int \frac {\cosh (c+d x)}{x^3 \left (a+b x^2\right )} \, dx=\int { \frac {\cosh \left (d x + c\right )}{{\left (b x^{2} + a\right )} x^{3}} \,d x } \]
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Timed out. \[ \int \frac {\cosh (c+d x)}{x^3 \left (a+b x^2\right )} \, dx=\int \frac {\mathrm {cosh}\left (c+d\,x\right )}{x^3\,\left (b\,x^2+a\right )} \,d x \]
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