Optimal. Leaf size=353 \[ -\frac {a^6}{10 \left (1-\sqrt {\frac {1-a x}{1+a x}}\right )^5}+\frac {a^6}{4 \left (1-\sqrt {\frac {1-a x}{1+a x}}\right )^4}-\frac {5 a^6}{12 \left (1-\sqrt {\frac {1-a x}{1+a x}}\right )^3}+\frac {3 a^6}{8 \left (1-\sqrt {\frac {1-a x}{1+a x}}\right )^2}-\frac {5 a^6}{16 \left (1-\sqrt {\frac {1-a x}{1+a x}}\right )}-\frac {2 a^6}{7 \left (1+\sqrt {\frac {1-a x}{1+a x}}\right )^7}+\frac {a^6}{\left (1+\sqrt {\frac {1-a x}{1+a x}}\right )^6}-\frac {19 a^6}{10 \left (1+\sqrt {\frac {1-a x}{1+a x}}\right )^5}+\frac {9 a^6}{4 \left (1+\sqrt {\frac {1-a x}{1+a x}}\right )^4}-\frac {11 a^6}{6 \left (1+\sqrt {\frac {1-a x}{1+a x}}\right )^3}+\frac {a^6}{\left (1+\sqrt {\frac {1-a x}{1+a x}}\right )^2}-\frac {5 a^6}{16 \left (1+\sqrt {\frac {1-a x}{1+a x}}\right )} \]
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Rubi [A]
time = 0.41, antiderivative size = 353, normalized size of antiderivative = 1.00, number of steps
used = 4, number of rules used = 2, integrand size = 12, \(\frac {\text {number of rules}}{\text {integrand size}}\) = 0.167, Rules used = {6472, 1626}
\begin {gather*} -\frac {5 a^6}{16 \left (1-\sqrt {\frac {1-a x}{a x+1}}\right )}-\frac {5 a^6}{16 \left (\sqrt {\frac {1-a x}{a x+1}}+1\right )}+\frac {3 a^6}{8 \left (1-\sqrt {\frac {1-a x}{a x+1}}\right )^2}+\frac {a^6}{\left (\sqrt {\frac {1-a x}{a x+1}}+1\right )^2}-\frac {5 a^6}{12 \left (1-\sqrt {\frac {1-a x}{a x+1}}\right )^3}-\frac {11 a^6}{6 \left (\sqrt {\frac {1-a x}{a x+1}}+1\right )^3}+\frac {a^6}{4 \left (1-\sqrt {\frac {1-a x}{a x+1}}\right )^4}+\frac {9 a^6}{4 \left (\sqrt {\frac {1-a x}{a x+1}}+1\right )^4}-\frac {a^6}{10 \left (1-\sqrt {\frac {1-a x}{a x+1}}\right )^5}-\frac {19 a^6}{10 \left (\sqrt {\frac {1-a x}{a x+1}}+1\right )^5}+\frac {a^6}{\left (\sqrt {\frac {1-a x}{a x+1}}+1\right )^6}-\frac {2 a^6}{7 \left (\sqrt {\frac {1-a x}{a x+1}}+1\right )^7} \end {gather*}
Antiderivative was successfully verified.
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Rule 1626
Rule 6472
Rubi steps
\begin {align*} \int \frac {e^{-\text {sech}^{-1}(a x)}}{x^7} \, dx &=\int \frac {1}{x^7 \left (\frac {1}{a x}+\sqrt {\frac {1-a x}{1+a x}}+\frac {\sqrt {\frac {1-a x}{1+a x}}}{a x}\right )} \, dx\\ &=-\left ((4 a) \text {Subst}\left (\int \frac {x \left (a+a x^2\right )^5}{(-1+x)^6 (1+x)^8} \, dx,x,\sqrt {\frac {1-a x}{1+a x}}\right )\right )\\ &=-\left ((4 a) \text {Subst}\left (\int \left (\frac {a^5}{8 (-1+x)^6}+\frac {a^5}{4 (-1+x)^5}+\frac {5 a^5}{16 (-1+x)^4}+\frac {3 a^5}{16 (-1+x)^3}+\frac {5 a^5}{64 (-1+x)^2}-\frac {a^5}{2 (1+x)^8}+\frac {3 a^5}{2 (1+x)^7}-\frac {19 a^5}{8 (1+x)^6}+\frac {9 a^5}{4 (1+x)^5}-\frac {11 a^5}{8 (1+x)^4}+\frac {a^5}{2 (1+x)^3}-\frac {5 a^5}{64 (1+x)^2}\right ) \, dx,x,\sqrt {\frac {1-a x}{1+a x}}\right )\right )\\ &=-\frac {a^6}{10 \left (1-\sqrt {\frac {1-a x}{1+a x}}\right )^5}+\frac {a^6}{4 \left (1-\sqrt {\frac {1-a x}{1+a x}}\right )^4}-\frac {5 a^6}{12 \left (1-\sqrt {\frac {1-a x}{1+a x}}\right )^3}+\frac {3 a^6}{8 \left (1-\sqrt {\frac {1-a x}{1+a x}}\right )^2}-\frac {5 a^6}{16 \left (1-\sqrt {\frac {1-a x}{1+a x}}\right )}-\frac {2 a^6}{7 \left (1+\sqrt {\frac {1-a x}{1+a x}}\right )^7}+\frac {a^6}{\left (1+\sqrt {\frac {1-a x}{1+a x}}\right )^6}-\frac {19 a^6}{10 \left (1+\sqrt {\frac {1-a x}{1+a x}}\right )^5}+\frac {9 a^6}{4 \left (1+\sqrt {\frac {1-a x}{1+a x}}\right )^4}-\frac {11 a^6}{6 \left (1+\sqrt {\frac {1-a x}{1+a x}}\right )^3}+\frac {a^6}{\left (1+\sqrt {\frac {1-a x}{1+a x}}\right )^2}-\frac {5 a^6}{16 \left (1+\sqrt {\frac {1-a x}{1+a x}}\right )}\\ \end {align*}
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Mathematica [A]
time = 0.07, size = 76, normalized size = 0.22 \begin {gather*} -\frac {15+\sqrt {\frac {1-a x}{1+a x}} (1+a x)^2 \left (-15+15 a x-12 a^2 x^2+12 a^3 x^3-8 a^4 x^4+8 a^5 x^5\right )}{105 a x^7} \end {gather*}
Warning: Unable to verify antiderivative.
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Maple [F]
time = 180.00, size = 0, normalized size = 0.00 \[\int \frac {1}{\left (\frac {1}{a x}+\sqrt {\frac {1}{a x}-1}\, \sqrt {1+\frac {1}{a x}}\right ) x^{7}}\, dx\]
Verification of antiderivative is not currently implemented for this CAS.
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Maxima [F]
time = 0.00, size = 0, normalized size = 0.00 \begin {gather*} \text {Failed to integrate} \end {gather*}
Verification of antiderivative is not currently implemented for this CAS.
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Fricas [A]
time = 0.35, size = 69, normalized size = 0.20 \begin {gather*} -\frac {{\left (8 \, a^{7} x^{7} + 4 \, a^{5} x^{5} + 3 \, a^{3} x^{3} - 15 \, a x\right )} \sqrt {\frac {a x + 1}{a x}} \sqrt {-\frac {a x - 1}{a x}} + 15}{105 \, a x^{7}} \end {gather*}
Verification of antiderivative is not currently implemented for this CAS.
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Sympy [F]
time = 0.00, size = 0, normalized size = 0.00 \begin {gather*} a \int \frac {1}{a x^{7} \sqrt {-1 + \frac {1}{a x}} \sqrt {1 + \frac {1}{a x}} + x^{6}}\, dx \end {gather*}
Verification of antiderivative is not currently implemented for this CAS.
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Giac [F]
time = 0.00, size = 0, normalized size = 0.00 \begin {gather*} \text {could not integrate} \end {gather*}
Verification of antiderivative is not currently implemented for this CAS.
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Mupad [B]
time = 2.59, size = 91, normalized size = 0.26 \begin {gather*} -\frac {1}{7\,a\,x^7}-\frac {\sqrt {\frac {1}{a\,x}-1}\,\left (\frac {a\,x^2}{35}-\frac {x}{7}-\frac {1}{7\,a}+\frac {a^2\,x^3}{35}+\frac {4\,a^3\,x^4}{105}+\frac {4\,a^4\,x^5}{105}+\frac {8\,a^5\,x^6}{105}+\frac {8\,a^6\,x^7}{105}\right )}{x^7\,\sqrt {\frac {1}{a\,x}+1}} \end {gather*}
Verification of antiderivative is not currently implemented for this CAS.
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