Optimal. Leaf size=8 \[ \sinh ^{-1}\left (\frac{x+2}{2}\right ) \]
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Rubi [A] time = 0.0062037, antiderivative size = 8, normalized size of antiderivative = 1., number of steps used = 2, number of rules used = 2, integrand size = 12, \(\frac{\text{number of rules}}{\text{integrand size}}\) = 0.167, Rules used = {619, 215} \[ \sinh ^{-1}\left (\frac{x+2}{2}\right ) \]
Antiderivative was successfully verified.
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Rule 619
Rule 215
Rubi steps
\begin{align*} \int \frac{1}{\sqrt{8+4 x+x^2}} \, dx &=\frac{1}{4} \operatorname{Subst}\left (\int \frac{1}{\sqrt{1+\frac{x^2}{16}}} \, dx,x,4+2 x\right )\\ &=\sinh ^{-1}\left (\frac{2+x}{2}\right )\\ \end{align*}
Mathematica [A] time = 0.0049086, size = 8, normalized size = 1. \[ \sinh ^{-1}\left (\frac{x+2}{2}\right ) \]
Antiderivative was successfully verified.
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Maple [A] time = 0.003, size = 7, normalized size = 0.9 \begin{align*}{\it Arcsinh} \left ( 1+{\frac{x}{2}} \right ) \end{align*}
Verification of antiderivative is not currently implemented for this CAS.
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Maxima [A] time = 1.40643, size = 8, normalized size = 1. \begin{align*} \operatorname{arsinh}\left (\frac{1}{2} \, x + 1\right ) \end{align*}
Verification of antiderivative is not currently implemented for this CAS.
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Fricas [B] time = 2.10724, size = 49, normalized size = 6.12 \begin{align*} -\log \left (-x + \sqrt{x^{2} + 4 \, x + 8} - 2\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}{\sqrt{x^{2} + 4 x + 8}}\, dx \end{align*}
Verification of antiderivative is not currently implemented for this CAS.
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Giac [B] time = 1.06002, size = 24, normalized size = 3. \begin{align*} -\log \left (-x + \sqrt{x^{2} + 4 \, x + 8} - 2\right ) \end{align*}
Verification of antiderivative is not currently implemented for this CAS.
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