Optimal. Leaf size=22 \[ -c \text{Ei}(-\log (c x))-\frac{1}{x \log (c x)} \]
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Rubi [A] time = 0.034901, antiderivative size = 22, normalized size of antiderivative = 1., number of steps used = 3, number of rules used = 3, integrand size = 10, \(\frac{\text{number of rules}}{\text{integrand size}}\) = 0.3, Rules used = {2306, 2309, 2178} \[ -c \text{Ei}(-\log (c x))-\frac{1}{x \log (c x)} \]
Antiderivative was successfully verified.
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Rule 2306
Rule 2309
Rule 2178
Rubi steps
\begin{align*} \int \frac{1}{x^2 \log ^2(c x)} \, dx &=-\frac{1}{x \log (c x)}-\int \frac{1}{x^2 \log (c x)} \, dx\\ &=-\frac{1}{x \log (c x)}-c \operatorname{Subst}\left (\int \frac{e^{-x}}{x} \, dx,x,\log (c x)\right )\\ &=-c \text{Ei}(-\log (c x))-\frac{1}{x \log (c x)}\\ \end{align*}
Mathematica [A] time = 0.0153269, size = 22, normalized size = 1. \[ -c \text{Ei}(-\log (c x))-\frac{1}{x \log (c x)} \]
Antiderivative was successfully verified.
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Maple [A] time = 0.036, size = 21, normalized size = 1. \begin{align*} -{\frac{1}{x\ln \left ( cx \right ) }}+c{\it Ei} \left ( 1,\ln \left ( cx \right ) \right ) \end{align*}
Verification of antiderivative is not currently implemented for this CAS.
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Maxima [A] time = 1.24657, size = 12, normalized size = 0.55 \begin{align*} -c \Gamma \left (-1, \log \left (c x\right )\right ) \end{align*}
Verification of antiderivative is not currently implemented for this CAS.
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Fricas [A] time = 0.578465, size = 76, normalized size = 3.45 \begin{align*} -\frac{c x \log \left (c x\right ) \logintegral \left (\frac{1}{c x}\right ) + 1}{x \log \left (c x\right )} \end{align*}
Verification of antiderivative is not currently implemented for this CAS.
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Sympy [F] time = 0., size = 0, normalized size = 0. \begin{align*} - \int \frac{1}{x^{2} \log{\left (c x \right )}}\, dx - \frac{1}{x \log{\left (c x \right )}} \end{align*}
Verification of antiderivative is not currently implemented for this CAS.
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Giac [F] time = 0., size = 0, normalized size = 0. \begin{align*} \int \frac{1}{x^{2} \log \left (c x\right )^{2}}\,{d x} \end{align*}
Verification of antiderivative is not currently implemented for this CAS.
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