Integrand size = 20, antiderivative size = 145 \[ \int e^{-\coth ^{-1}(a x)} \left (c-a^2 c x^2\right ) \, dx=-\frac {1}{2} c \sqrt {1-\frac {1}{a x}} \sqrt {1+\frac {1}{a x}} x+\frac {1}{2} a c \sqrt {1-\frac {1}{a x}} \left (1+\frac {1}{a x}\right )^{3/2} x^2-\frac {1}{3} a^2 c \left (1-\frac {1}{a x}\right )^{3/2} \left (1+\frac {1}{a x}\right )^{3/2} x^3-\frac {c \text {arctanh}\left (\sqrt {1-\frac {1}{a x}} \sqrt {1+\frac {1}{a x}}\right )}{2 a} \]
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Time = 0.09 (sec) , antiderivative size = 145, normalized size of antiderivative = 1.00, number of steps used = 7, number of rules used = 5, \(\frac {\text {number of rules}}{\text {integrand size}}\) = 0.250, Rules used = {6326, 6330, 96, 94, 214} \[ \int e^{-\coth ^{-1}(a x)} \left (c-a^2 c x^2\right ) \, dx=-\frac {1}{3} a^2 c x^3 \left (1-\frac {1}{a x}\right )^{3/2} \left (\frac {1}{a x}+1\right )^{3/2}-\frac {c \text {arctanh}\left (\sqrt {1-\frac {1}{a x}} \sqrt {\frac {1}{a x}+1}\right )}{2 a}+\frac {1}{2} a c x^2 \sqrt {1-\frac {1}{a x}} \left (\frac {1}{a x}+1\right )^{3/2}-\frac {1}{2} c x \sqrt {1-\frac {1}{a x}} \sqrt {\frac {1}{a x}+1} \]
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Rule 94
Rule 96
Rule 214
Rule 6326
Rule 6330
Rubi steps \begin{align*} \text {integral}& = -\left (\left (a^2 c\right ) \int e^{-\coth ^{-1}(a x)} \left (1-\frac {1}{a^2 x^2}\right ) x^2 \, dx\right ) \\ & = \left (a^2 c\right ) \text {Subst}\left (\int \frac {\left (1-\frac {x}{a}\right )^{3/2} \sqrt {1+\frac {x}{a}}}{x^4} \, dx,x,\frac {1}{x}\right ) \\ & = -\frac {1}{3} a^2 c \left (1-\frac {1}{a x}\right )^{3/2} \left (1+\frac {1}{a x}\right )^{3/2} x^3-(a c) \text {Subst}\left (\int \frac {\sqrt {1-\frac {x}{a}} \sqrt {1+\frac {x}{a}}}{x^3} \, dx,x,\frac {1}{x}\right ) \\ & = \frac {1}{2} a c \sqrt {1-\frac {1}{a x}} \left (1+\frac {1}{a x}\right )^{3/2} x^2-\frac {1}{3} a^2 c \left (1-\frac {1}{a x}\right )^{3/2} \left (1+\frac {1}{a x}\right )^{3/2} x^3+\frac {1}{2} c \text {Subst}\left (\int \frac {\sqrt {1+\frac {x}{a}}}{x^2 \sqrt {1-\frac {x}{a}}} \, dx,x,\frac {1}{x}\right ) \\ & = -\frac {1}{2} c \sqrt {1-\frac {1}{a x}} \sqrt {1+\frac {1}{a x}} x+\frac {1}{2} a c \sqrt {1-\frac {1}{a x}} \left (1+\frac {1}{a x}\right )^{3/2} x^2-\frac {1}{3} a^2 c \left (1-\frac {1}{a x}\right )^{3/2} \left (1+\frac {1}{a x}\right )^{3/2} x^3+\frac {c \text {Subst}\left (\int \frac {1}{x \sqrt {1-\frac {x}{a}} \sqrt {1+\frac {x}{a}}} \, dx,x,\frac {1}{x}\right )}{2 a} \\ & = -\frac {1}{2} c \sqrt {1-\frac {1}{a x}} \sqrt {1+\frac {1}{a x}} x+\frac {1}{2} a c \sqrt {1-\frac {1}{a x}} \left (1+\frac {1}{a x}\right )^{3/2} x^2-\frac {1}{3} a^2 c \left (1-\frac {1}{a x}\right )^{3/2} \left (1+\frac {1}{a x}\right )^{3/2} x^3-\frac {c \text {Subst}\left (\int \frac {1}{\frac {1}{a}-\frac {x^2}{a}} \, dx,x,\sqrt {1-\frac {1}{a x}} \sqrt {1+\frac {1}{a x}}\right )}{2 a^2} \\ & = -\frac {1}{2} c \sqrt {1-\frac {1}{a x}} \sqrt {1+\frac {1}{a x}} x+\frac {1}{2} a c \sqrt {1-\frac {1}{a x}} \left (1+\frac {1}{a x}\right )^{3/2} x^2-\frac {1}{3} a^2 c \left (1-\frac {1}{a x}\right )^{3/2} \left (1+\frac {1}{a x}\right )^{3/2} x^3-\frac {c \text {arctanh}\left (\sqrt {1-\frac {1}{a x}} \sqrt {1+\frac {1}{a x}}\right )}{2 a} \\ \end{align*}
Time = 0.12 (sec) , antiderivative size = 61, normalized size of antiderivative = 0.42 \[ \int e^{-\coth ^{-1}(a x)} \left (c-a^2 c x^2\right ) \, dx=\frac {c \left (a \sqrt {1-\frac {1}{a^2 x^2}} x \left (2+3 a x-2 a^2 x^2\right )-3 \log \left (\left (1+\sqrt {1-\frac {1}{a^2 x^2}}\right ) x\right )\right )}{6 a} \]
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Time = 0.07 (sec) , antiderivative size = 108, normalized size of antiderivative = 0.74
method | result | size |
risch | \(-\frac {\left (2 a^{2} x^{2}-3 a x -2\right ) \left (a x +1\right ) c \sqrt {\frac {a x -1}{a x +1}}}{6 a}-\frac {\ln \left (\frac {a^{2} x}{\sqrt {a^{2}}}+\sqrt {a^{2} x^{2}-1}\right ) c \sqrt {\frac {a x -1}{a x +1}}\, \sqrt {\left (a x -1\right ) \left (a x +1\right )}}{2 \sqrt {a^{2}}\, \left (a x -1\right )}\) | \(108\) |
default | \(\frac {\sqrt {\frac {a x -1}{a x +1}}\, \left (a x +1\right ) c \left (3 \sqrt {a^{2} x^{2}-1}\, \sqrt {a^{2}}\, a x -2 \left (\left (a x -1\right ) \left (a x +1\right )\right )^{\frac {3}{2}} \sqrt {a^{2}}-3 \ln \left (\frac {a^{2} x +\sqrt {a^{2} x^{2}-1}\, \sqrt {a^{2}}}{\sqrt {a^{2}}}\right ) a \right )}{6 \sqrt {\left (a x -1\right ) \left (a x +1\right )}\, \sqrt {a^{2}}\, a}\) | \(119\) |
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Time = 0.24 (sec) , antiderivative size = 91, normalized size of antiderivative = 0.63 \[ \int e^{-\coth ^{-1}(a x)} \left (c-a^2 c x^2\right ) \, dx=-\frac {3 \, c \log \left (\sqrt {\frac {a x - 1}{a x + 1}} + 1\right ) - 3 \, c \log \left (\sqrt {\frac {a x - 1}{a x + 1}} - 1\right ) + {\left (2 \, a^{3} c x^{3} - a^{2} c x^{2} - 5 \, a c x - 2 \, c\right )} \sqrt {\frac {a x - 1}{a x + 1}}}{6 \, a} \]
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\[ \int e^{-\coth ^{-1}(a x)} \left (c-a^2 c x^2\right ) \, dx=- c \left (\int a^{2} x^{2} \sqrt {\frac {a x}{a x + 1} - \frac {1}{a x + 1}}\, dx + \int \left (- \sqrt {\frac {a x}{a x + 1} - \frac {1}{a x + 1}}\right )\, dx\right ) \]
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Time = 0.20 (sec) , antiderivative size = 171, normalized size of antiderivative = 1.18 \[ \int e^{-\coth ^{-1}(a x)} \left (c-a^2 c x^2\right ) \, dx=\frac {1}{6} \, a {\left (\frac {2 \, {\left (3 \, c \left (\frac {a x - 1}{a x + 1}\right )^{\frac {5}{2}} + 8 \, c \left (\frac {a x - 1}{a x + 1}\right )^{\frac {3}{2}} - 3 \, c \sqrt {\frac {a x - 1}{a x + 1}}\right )}}{\frac {3 \, {\left (a x - 1\right )} a^{2}}{a x + 1} - \frac {3 \, {\left (a x - 1\right )}^{2} a^{2}}{{\left (a x + 1\right )}^{2}} + \frac {{\left (a x - 1\right )}^{3} a^{2}}{{\left (a x + 1\right )}^{3}} - a^{2}} - \frac {3 \, c \log \left (\sqrt {\frac {a x - 1}{a x + 1}} + 1\right )}{a^{2}} + \frac {3 \, c \log \left (\sqrt {\frac {a x - 1}{a x + 1}} - 1\right )}{a^{2}}\right )} \]
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Time = 0.29 (sec) , antiderivative size = 82, normalized size of antiderivative = 0.57 \[ \int e^{-\coth ^{-1}(a x)} \left (c-a^2 c x^2\right ) \, dx=\frac {c \log \left ({\left | -x {\left | a \right |} + \sqrt {a^{2} x^{2} - 1} \right |}\right ) \mathrm {sgn}\left (a x + 1\right )}{2 \, {\left | a \right |}} - \frac {1}{6} \, \sqrt {a^{2} x^{2} - 1} {\left ({\left (2 \, a c x \mathrm {sgn}\left (a x + 1\right ) - 3 \, c \mathrm {sgn}\left (a x + 1\right )\right )} x - \frac {2 \, c \mathrm {sgn}\left (a x + 1\right )}{a}\right )} \]
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Time = 3.89 (sec) , antiderivative size = 132, normalized size of antiderivative = 0.91 \[ \int e^{-\coth ^{-1}(a x)} \left (c-a^2 c x^2\right ) \, dx=-\frac {\frac {8\,c\,{\left (\frac {a\,x-1}{a\,x+1}\right )}^{3/2}}{3}-c\,\sqrt {\frac {a\,x-1}{a\,x+1}}+c\,{\left (\frac {a\,x-1}{a\,x+1}\right )}^{5/2}}{a-\frac {3\,a\,\left (a\,x-1\right )}{a\,x+1}+\frac {3\,a\,{\left (a\,x-1\right )}^2}{{\left (a\,x+1\right )}^2}-\frac {a\,{\left (a\,x-1\right )}^3}{{\left (a\,x+1\right )}^3}}-\frac {c\,\mathrm {atanh}\left (\sqrt {\frac {a\,x-1}{a\,x+1}}\right )}{a} \]
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