Optimal. Leaf size=236 \[ \frac {\left (31736+1545 x+112192 x^2-2560 x^3+40320 x^4\right ) \sqrt {1+\sqrt {x+\sqrt {1+x^2}}}+\left (-1542+40688 x+1536 x^2+2240 x^3\right ) \sqrt {x+\sqrt {1+x^2}} \sqrt {1+\sqrt {x+\sqrt {1+x^2}}}+\sqrt {1+x^2} \left (\left (2825+92032 x-2560 x^2+40320 x^3\right ) \sqrt {1+\sqrt {x+\sqrt {1+x^2}}}+\left (39568+1536 x+2240 x^2\right ) \sqrt {x+\sqrt {1+x^2}} \sqrt {1+\sqrt {x+\sqrt {1+x^2}}}\right )}{55440 \left (x+\sqrt {1+x^2}\right )^{3/2}}-\frac {1}{16} \tanh ^{-1}\left (\sqrt {1+\sqrt {x+\sqrt {1+x^2}}}\right ) \]
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Rubi [F]
time = 0.25, antiderivative size = 0, normalized size of antiderivative = 0.00, number of steps
used = 0, number of rules used = 0, integrand size = 0, \(\frac {\text {number of rules}}{\text {integrand size}}\) = 0.000, Rules used = {}
\begin {gather*} \int \sqrt {1+x^2} \sqrt {x+\sqrt {1+x^2}} \sqrt {1+\sqrt {x+\sqrt {1+x^2}}} \, dx \end {gather*}
Verification is not applicable to the result.
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Rubi steps
\begin {align*} \int \sqrt {1+x^2} \sqrt {x+\sqrt {1+x^2}} \sqrt {1+\sqrt {x+\sqrt {1+x^2}}} \, dx &=\int \sqrt {1+x^2} \sqrt {x+\sqrt {1+x^2}} \sqrt {1+\sqrt {x+\sqrt {1+x^2}}} \, dx\\ \end {align*}
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Mathematica [A]
time = 0.33, size = 171, normalized size = 0.72 \begin {gather*} \frac {\sqrt {1+\sqrt {x+\sqrt {1+x^2}}} \left (31736+1545 x+112192 x^2-2560 x^3+40320 x^4+2 \left (-771+20344 x+768 x^2+1120 x^3\right ) \sqrt {x+\sqrt {1+x^2}}+\sqrt {1+x^2} \left (2825+92032 x-2560 x^2+40320 x^3+16 \left (2473+96 x+140 x^2\right ) \sqrt {x+\sqrt {1+x^2}}\right )\right )}{55440 \left (x+\sqrt {1+x^2}\right )^{3/2}}-\frac {1}{16} \tanh ^{-1}\left (\sqrt {1+\sqrt {x+\sqrt {1+x^2}}}\right ) \end {gather*}
Antiderivative was successfully verified.
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Maple [F]
time = 0.03, size = 0, normalized size = 0.00 \[\int \sqrt {x^{2}+1}\, \sqrt {x +\sqrt {x^{2}+1}}\, \sqrt {1+\sqrt {x +\sqrt {x^{2}+1}}}\, dx\]
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 = 0.39, size = 119, normalized size = 0.50 \begin {gather*} \frac {1}{55440} \, {\left (1120 \, x^{2} + 2 \, \sqrt {x^{2} + 1} {\left (560 \, x - 771\right )} - {\left (8400 \, x^{2} - 5 \, \sqrt {x^{2} + 1} {\left (5712 \, x + 565\right )} + 4105 \, x - 31736\right )} \sqrt {x + \sqrt {x^{2} + 1}} + 3078 \, x + 39568\right )} \sqrt {\sqrt {x + \sqrt {x^{2} + 1}} + 1} - \frac {1}{32} \, \log \left (\sqrt {\sqrt {x + \sqrt {x^{2} + 1}} + 1} + 1\right ) + \frac {1}{32} \, \log \left (\sqrt {\sqrt {x + \sqrt {x^{2} + 1}} + 1} - 1\right ) \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*} \int \sqrt {x + \sqrt {x^{2} + 1}} \sqrt {x^{2} + 1} \sqrt {\sqrt {x + \sqrt {x^{2} + 1}} + 1}\, dx \end {gather*}
Verification of antiderivative is not currently implemented for this CAS.
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Giac [F(-1)] Timed out
time = 0.00, size = 0, normalized size = 0.00 \begin {gather*} \text {Timed out} \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 = -0.00 \begin {gather*} \int \sqrt {\sqrt {x+\sqrt {x^2+1}}+1}\,\sqrt {x^2+1}\,\sqrt {x+\sqrt {x^2+1}} \,d x \end {gather*}
Verification of antiderivative is not currently implemented for this CAS.
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