Integrand size = 27, antiderivative size = 101 \[ \int \frac {e^{-2 \coth ^{-1}(a x)} \sqrt {c-a^2 c x^2}}{x^4} \, dx=\frac {\sqrt {c-a^2 c x^2}}{3 x^3}-\frac {a \sqrt {c-a^2 c x^2}}{x^2}+\frac {5 a^2 \sqrt {c-a^2 c x^2}}{3 x}-a^3 \sqrt {c} \text {arctanh}\left (\frac {\sqrt {c-a^2 c x^2}}{\sqrt {c}}\right ) \]
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Time = 0.28 (sec) , antiderivative size = 101, normalized size of antiderivative = 1.00, number of steps used = 8, number of rules used = 8, \(\frac {\text {number of rules}}{\text {integrand size}}\) = 0.296, Rules used = {6302, 6287, 1821, 849, 821, 272, 65, 214} \[ \int \frac {e^{-2 \coth ^{-1}(a x)} \sqrt {c-a^2 c x^2}}{x^4} \, dx=\frac {5 a^2 \sqrt {c-a^2 c x^2}}{3 x}-\frac {a \sqrt {c-a^2 c x^2}}{x^2}+\frac {\sqrt {c-a^2 c x^2}}{3 x^3}+a^3 \left (-\sqrt {c}\right ) \text {arctanh}\left (\frac {\sqrt {c-a^2 c x^2}}{\sqrt {c}}\right ) \]
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Rule 65
Rule 214
Rule 272
Rule 821
Rule 849
Rule 1821
Rule 6287
Rule 6302
Rubi steps \begin{align*} \text {integral}& = -\int \frac {e^{-2 \text {arctanh}(a x)} \sqrt {c-a^2 c x^2}}{x^4} \, dx \\ & = -\left (c \int \frac {(1-a x)^2}{x^4 \sqrt {c-a^2 c x^2}} \, dx\right ) \\ & = \frac {\sqrt {c-a^2 c x^2}}{3 x^3}+\frac {1}{3} \int \frac {6 a c-5 a^2 c x}{x^3 \sqrt {c-a^2 c x^2}} \, dx \\ & = \frac {\sqrt {c-a^2 c x^2}}{3 x^3}-\frac {a \sqrt {c-a^2 c x^2}}{x^2}-\frac {\int \frac {10 a^2 c^2-6 a^3 c^2 x}{x^2 \sqrt {c-a^2 c x^2}} \, dx}{6 c} \\ & = \frac {\sqrt {c-a^2 c x^2}}{3 x^3}-\frac {a \sqrt {c-a^2 c x^2}}{x^2}+\frac {5 a^2 \sqrt {c-a^2 c x^2}}{3 x}+\left (a^3 c\right ) \int \frac {1}{x \sqrt {c-a^2 c x^2}} \, dx \\ & = \frac {\sqrt {c-a^2 c x^2}}{3 x^3}-\frac {a \sqrt {c-a^2 c x^2}}{x^2}+\frac {5 a^2 \sqrt {c-a^2 c x^2}}{3 x}+\frac {1}{2} \left (a^3 c\right ) \text {Subst}\left (\int \frac {1}{x \sqrt {c-a^2 c x}} \, dx,x,x^2\right ) \\ & = \frac {\sqrt {c-a^2 c x^2}}{3 x^3}-\frac {a \sqrt {c-a^2 c x^2}}{x^2}+\frac {5 a^2 \sqrt {c-a^2 c x^2}}{3 x}-a \text {Subst}\left (\int \frac {1}{\frac {1}{a^2}-\frac {x^2}{a^2 c}} \, dx,x,\sqrt {c-a^2 c x^2}\right ) \\ & = \frac {\sqrt {c-a^2 c x^2}}{3 x^3}-\frac {a \sqrt {c-a^2 c x^2}}{x^2}+\frac {5 a^2 \sqrt {c-a^2 c x^2}}{3 x}-a^3 \sqrt {c} \text {arctanh}\left (\frac {\sqrt {c-a^2 c x^2}}{\sqrt {c}}\right ) \\ \end{align*}
Time = 0.18 (sec) , antiderivative size = 82, normalized size of antiderivative = 0.81 \[ \int \frac {e^{-2 \coth ^{-1}(a x)} \sqrt {c-a^2 c x^2}}{x^4} \, dx=\frac {\left (1-3 a x+5 a^2 x^2\right ) \sqrt {c-a^2 c x^2}}{3 x^3}+a^3 \sqrt {c} \log (x)-a^3 \sqrt {c} \log \left (c+\sqrt {c} \sqrt {c-a^2 c x^2}\right ) \]
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Time = 0.72 (sec) , antiderivative size = 87, normalized size of antiderivative = 0.86
method | result | size |
risch | \(-\frac {\left (5 a^{4} x^{4}-3 a^{3} x^{3}-4 a^{2} x^{2}+3 a x -1\right ) c}{3 x^{3} \sqrt {-c \left (a^{2} x^{2}-1\right )}}-a^{3} \sqrt {c}\, \ln \left (\frac {2 c +2 \sqrt {c}\, \sqrt {-a^{2} c \,x^{2}+c}}{x}\right )\) | \(87\) |
default | \(\frac {\left (-a^{2} c \,x^{2}+c \right )^{\frac {3}{2}}}{3 c \,x^{3}}+2 a^{3} \left (\sqrt {-a^{2} c \,x^{2}+c}-\sqrt {c}\, \ln \left (\frac {2 c +2 \sqrt {c}\, \sqrt {-a^{2} c \,x^{2}+c}}{x}\right )\right )+2 a \left (-\frac {\left (-a^{2} c \,x^{2}+c \right )^{\frac {3}{2}}}{2 c \,x^{2}}-\frac {a^{2} \left (\sqrt {-a^{2} c \,x^{2}+c}-\sqrt {c}\, \ln \left (\frac {2 c +2 \sqrt {c}\, \sqrt {-a^{2} c \,x^{2}+c}}{x}\right )\right )}{2}\right )-2 a^{2} \left (-\frac {\left (-a^{2} c \,x^{2}+c \right )^{\frac {3}{2}}}{c x}-2 a^{2} \left (\frac {x \sqrt {-a^{2} c \,x^{2}+c}}{2}+\frac {c \arctan \left (\frac {\sqrt {a^{2} c}\, x}{\sqrt {-a^{2} c \,x^{2}+c}}\right )}{2 \sqrt {a^{2} c}}\right )\right )-2 a^{3} \left (\sqrt {-a^{2} c \left (x +\frac {1}{a}\right )^{2}+2 \left (x +\frac {1}{a}\right ) a c}+\frac {a c \arctan \left (\frac {\sqrt {a^{2} c}\, x}{\sqrt {-a^{2} c \left (x +\frac {1}{a}\right )^{2}+2 \left (x +\frac {1}{a}\right ) a c}}\right )}{\sqrt {a^{2} c}}\right )\) | \(308\) |
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Time = 0.27 (sec) , antiderivative size = 165, normalized size of antiderivative = 1.63 \[ \int \frac {e^{-2 \coth ^{-1}(a x)} \sqrt {c-a^2 c x^2}}{x^4} \, dx=\left [\frac {3 \, a^{3} \sqrt {c} x^{3} \log \left (-\frac {a^{2} c x^{2} + 2 \, \sqrt {-a^{2} c x^{2} + c} \sqrt {c} - 2 \, c}{x^{2}}\right ) + 2 \, \sqrt {-a^{2} c x^{2} + c} {\left (5 \, a^{2} x^{2} - 3 \, a x + 1\right )}}{6 \, x^{3}}, -\frac {3 \, a^{3} \sqrt {-c} x^{3} \arctan \left (\frac {\sqrt {-a^{2} c x^{2} + c} \sqrt {-c}}{a^{2} c x^{2} - c}\right ) - \sqrt {-a^{2} c x^{2} + c} {\left (5 \, a^{2} x^{2} - 3 \, a x + 1\right )}}{3 \, x^{3}}\right ] \]
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\[ \int \frac {e^{-2 \coth ^{-1}(a x)} \sqrt {c-a^2 c x^2}}{x^4} \, dx=\int \frac {\sqrt {- c \left (a x - 1\right ) \left (a x + 1\right )} \left (a x - 1\right )}{x^{4} \left (a x + 1\right )}\, dx \]
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\[ \int \frac {e^{-2 \coth ^{-1}(a x)} \sqrt {c-a^2 c x^2}}{x^4} \, dx=\int { \frac {\sqrt {-a^{2} c x^{2} + c} {\left (a x - 1\right )}}{{\left (a x + 1\right )} x^{4}} \,d x } \]
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Leaf count of result is larger than twice the leaf count of optimal. 250 vs. \(2 (85) = 170\).
Time = 0.28 (sec) , antiderivative size = 250, normalized size of antiderivative = 2.48 \[ \int \frac {e^{-2 \coth ^{-1}(a x)} \sqrt {c-a^2 c x^2}}{x^4} \, dx=\frac {2 \, a^{3} c \arctan \left (-\frac {\sqrt {-a^{2} c} x - \sqrt {-a^{2} c x^{2} + c}}{\sqrt {-c}}\right )}{\sqrt {-c}} - \frac {2 \, {\left (3 \, {\left (\sqrt {-a^{2} c} x - \sqrt {-a^{2} c x^{2} + c}\right )}^{5} a^{3} c + 3 \, {\left (\sqrt {-a^{2} c} x - \sqrt {-a^{2} c x^{2} + c}\right )}^{4} a^{2} \sqrt {-c} c {\left | a \right |} - 12 \, {\left (\sqrt {-a^{2} c} x - \sqrt {-a^{2} c x^{2} + c}\right )}^{2} a^{2} \sqrt {-c} c^{2} {\left | a \right |} - 3 \, {\left (\sqrt {-a^{2} c} x - \sqrt {-a^{2} c x^{2} + c}\right )} a^{3} c^{3} + 5 \, a^{2} \sqrt {-c} c^{3} {\left | a \right |}\right )}}{3 \, {\left ({\left (\sqrt {-a^{2} c} x - \sqrt {-a^{2} c x^{2} + c}\right )}^{2} - c\right )}^{3}} \]
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Timed out. \[ \int \frac {e^{-2 \coth ^{-1}(a x)} \sqrt {c-a^2 c x^2}}{x^4} \, dx=\int \frac {\sqrt {c-a^2\,c\,x^2}\,\left (a\,x-1\right )}{x^4\,\left (a\,x+1\right )} \,d x \]
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