Optimal. Leaf size=90 \[ \frac {4 x}{9 a^2}+\frac {2 x^3}{27}-\frac {4 \sqrt {-1+a x} \sqrt {1+a x} \cosh ^{-1}(a x)}{9 a^3}-\frac {2 x^2 \sqrt {-1+a x} \sqrt {1+a x} \cosh ^{-1}(a x)}{9 a}+\frac {1}{3} x^3 \cosh ^{-1}(a x)^2 \]
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Rubi [A]
time = 0.20, antiderivative size = 90, normalized size of antiderivative = 1.00, number of steps
used = 5, number of rules used = 5, integrand size = 10, \(\frac {\text {number of rules}}{\text {integrand size}}\) = 0.500, Rules used = {5883, 5939,
5915, 8, 30} \begin {gather*} -\frac {4 \sqrt {a x-1} \sqrt {a x+1} \cosh ^{-1}(a x)}{9 a^3}+\frac {4 x}{9 a^2}+\frac {1}{3} x^3 \cosh ^{-1}(a x)^2-\frac {2 x^2 \sqrt {a x-1} \sqrt {a x+1} \cosh ^{-1}(a x)}{9 a}+\frac {2 x^3}{27} \end {gather*}
Antiderivative was successfully verified.
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Rule 8
Rule 30
Rule 5883
Rule 5915
Rule 5939
Rubi steps
\begin {align*} \int x^2 \cosh ^{-1}(a x)^2 \, dx &=\frac {1}{3} x^3 \cosh ^{-1}(a x)^2-\frac {1}{3} (2 a) \int \frac {x^3 \cosh ^{-1}(a x)}{\sqrt {-1+a x} \sqrt {1+a x}} \, dx\\ &=-\frac {2 x^2 \sqrt {-1+a x} \sqrt {1+a x} \cosh ^{-1}(a x)}{9 a}+\frac {1}{3} x^3 \cosh ^{-1}(a x)^2+\frac {2 \int x^2 \, dx}{9}-\frac {4 \int \frac {x \cosh ^{-1}(a x)}{\sqrt {-1+a x} \sqrt {1+a x}} \, dx}{9 a}\\ &=\frac {2 x^3}{27}-\frac {4 \sqrt {-1+a x} \sqrt {1+a x} \cosh ^{-1}(a x)}{9 a^3}-\frac {2 x^2 \sqrt {-1+a x} \sqrt {1+a x} \cosh ^{-1}(a x)}{9 a}+\frac {1}{3} x^3 \cosh ^{-1}(a x)^2+\frac {4 \int 1 \, dx}{9 a^2}\\ &=\frac {4 x}{9 a^2}+\frac {2 x^3}{27}-\frac {4 \sqrt {-1+a x} \sqrt {1+a x} \cosh ^{-1}(a x)}{9 a^3}-\frac {2 x^2 \sqrt {-1+a x} \sqrt {1+a x} \cosh ^{-1}(a x)}{9 a}+\frac {1}{3} x^3 \cosh ^{-1}(a x)^2\\ \end {align*}
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Mathematica [A]
time = 0.07, size = 64, normalized size = 0.71 \begin {gather*} \frac {1}{27} \left (2 x \left (\frac {6}{a^2}+x^2\right )-\frac {6 \sqrt {-1+a x} \sqrt {1+a x} \left (2+a^2 x^2\right ) \cosh ^{-1}(a x)}{a^3}+9 x^3 \cosh ^{-1}(a x)^2\right ) \end {gather*}
Antiderivative was successfully verified.
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Maple [F]
time = 180.00, size = 0, normalized size = 0.00 \[\int x^{2} \mathrm {arccosh}\left (a x \right )^{2}\, dx\]
Verification of antiderivative is not currently implemented for this CAS.
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Maxima [A]
time = 0.26, size = 70, normalized size = 0.78 \begin {gather*} \frac {1}{3} \, x^{3} \operatorname {arcosh}\left (a x\right )^{2} - \frac {2}{9} \, a {\left (\frac {\sqrt {a^{2} x^{2} - 1} x^{2}}{a^{2}} + \frac {2 \, \sqrt {a^{2} x^{2} - 1}}{a^{4}}\right )} \operatorname {arcosh}\left (a x\right ) + \frac {2 \, {\left (a^{2} x^{3} + 6 \, x\right )}}{27 \, a^{2}} \end {gather*}
Verification of antiderivative is not currently implemented for this CAS.
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Fricas [A]
time = 0.37, size = 82, normalized size = 0.91 \begin {gather*} \frac {9 \, a^{3} x^{3} \log \left (a x + \sqrt {a^{2} x^{2} - 1}\right )^{2} + 2 \, a^{3} x^{3} - 6 \, {\left (a^{2} x^{2} + 2\right )} \sqrt {a^{2} x^{2} - 1} \log \left (a x + \sqrt {a^{2} x^{2} - 1}\right ) + 12 \, a x}{27 \, a^{3}} \end {gather*}
Verification of antiderivative is not currently implemented for this CAS.
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Sympy [A]
time = 0.19, size = 85, normalized size = 0.94 \begin {gather*} \begin {cases} \frac {x^{3} \operatorname {acosh}^{2}{\left (a x \right )}}{3} + \frac {2 x^{3}}{27} - \frac {2 x^{2} \sqrt {a^{2} x^{2} - 1} \operatorname {acosh}{\left (a x \right )}}{9 a} + \frac {4 x}{9 a^{2}} - \frac {4 \sqrt {a^{2} x^{2} - 1} \operatorname {acosh}{\left (a x \right )}}{9 a^{3}} & \text {for}\: a \neq 0 \\- \frac {\pi ^{2} x^{3}}{12} & \text {otherwise} \end {cases} \end {gather*}
Verification of antiderivative is not currently implemented for this CAS.
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Giac [F(-2)]
time = 0.00, size = 0, normalized size = 0.00 \begin {gather*} \text {Exception raised: TypeError} \end {gather*}
Verification of antiderivative is not currently implemented for this CAS.
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Mupad [F]
time = 0.00, size = -1, normalized size = -0.01 \begin {gather*} \int x^2\,{\mathrm {acosh}\left (a\,x\right )}^2 \,d x \end {gather*}
Verification of antiderivative is not currently implemented for this CAS.
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