Optimal. Leaf size=19 \[ \left (-4-x+\log \left (\frac {4}{x^2}\right )\right ) \log (5-\log (4)) \]
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Rubi [A]
time = 0.00, antiderivative size = 22, normalized size of antiderivative = 1.16, number of steps
used = 3, number of rules used = 2, integrand size = 16, \(\frac {\text {number of rules}}{\text {integrand size}}\) = 0.125, Rules used = {12, 45}
\begin {gather*} x (-\log (5-\log (4)))-2 \log (5-\log (4)) \log (x) \end {gather*}
Antiderivative was successfully verified.
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Rule 12
Rule 45
Rubi steps
\begin {gather*} \begin {aligned} \text {integral} &=\log (5-\log (4)) \int \frac {-2-x}{x} \, dx\\ &=\log (5-\log (4)) \int \left (-1-\frac {2}{x}\right ) \, dx\\ &=-x \log (5-\log (4))-2 \log (x) \log (5-\log (4))\\ \end {aligned} \end {gather*}
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Mathematica [A]
time = 0.00, size = 15, normalized size = 0.79 \begin {gather*} -((x+2 \log (x)) \log (5-\log (4))) \end {gather*}
Antiderivative was successfully verified.
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Maple [A]
time = 0.12, size = 17, normalized size = 0.89
method | result | size |
default | \(\ln \left (-2 \ln \left (2\right )+5\right ) \left (-x -2 \ln \left (x \right )\right )\) | \(17\) |
norman | \(-\ln \left (-2 \ln \left (2\right )+5\right ) x -2 \ln \left (-2 \ln \left (2\right )+5\right ) \ln \left (x \right )\) | \(23\) |
risch | \(-\ln \left (-2 \ln \left (2\right )+5\right ) x -2 \ln \left (-2 \ln \left (2\right )+5\right ) \ln \left (x \right )\) | \(23\) |
Verification of antiderivative is not currently implemented for this CAS.
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Maxima [A]
time = 0.26, size = 15, normalized size = 0.79 \begin {gather*} -{\left (x + 2 \, \log \left (x\right )\right )} \log \left (-2 \, \log \left (2\right ) + 5\right ) \end {gather*}
Verification of antiderivative is not currently implemented for this CAS.
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Fricas [A]
time = 0.33, size = 22, normalized size = 1.16 \begin {gather*} -x \log \left (-2 \, \log \left (2\right ) + 5\right ) - 2 \, \log \left (x\right ) \log \left (-2 \, \log \left (2\right ) + 5\right ) \end {gather*}
Verification of antiderivative is not currently implemented for this CAS.
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Sympy [A]
time = 0.05, size = 24, normalized size = 1.26 \begin {gather*} - x \log {\left (5 - 2 \log {\left (2 \right )} \right )} - 2 \log {\left (x \right )} \log {\left (5 - 2 \log {\left (2 \right )} \right )} \end {gather*}
Verification of antiderivative is not currently implemented for this CAS.
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Giac [A]
time = 0.40, size = 16, normalized size = 0.84 \begin {gather*} -{\left (x + 2 \, \log \left ({\left | x \right |}\right )\right )} \log \left (-2 \, \log \left (2\right ) + 5\right ) \end {gather*}
Verification of antiderivative is not currently implemented for this CAS.
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Mupad [B]
time = 0.05, size = 15, normalized size = 0.79 \begin {gather*} -\ln \left (5-\ln \left (4\right )\right )\,\left (x+2\,\ln \left (x\right )\right ) \end {gather*}
Verification of antiderivative is not currently implemented for this CAS.
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