Optimal. Leaf size=22 \[ \frac {x \tan ^{-1}\left (2 \sqrt [4]{x^4}\right )}{2 \sqrt [4]{x^4}} \]
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Rubi [A] time = 0.01, antiderivative size = 22, normalized size of antiderivative = 1.00, number of steps used = 2, number of rules used = 2, integrand size = 13, \(\frac {\text {number of rules}}{\text {integrand size}}\) = 0.154, Rules used = {254, 203} \[ \frac {x \tan ^{-1}\left (2 \sqrt [4]{x^4}\right )}{2 \sqrt [4]{x^4}} \]
Antiderivative was successfully verified.
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Rule 203
Rule 254
Rubi steps
\begin {align*} \int \frac {1}{1+4 \sqrt {x^4}} \, dx &=\frac {x \operatorname {Subst}\left (\int \frac {1}{1+4 x^2} \, dx,x,\sqrt [4]{x^4}\right )}{\sqrt [4]{x^4}}\\ &=\frac {x \tan ^{-1}\left (2 \sqrt [4]{x^4}\right )}{2 \sqrt [4]{x^4}}\\ \end {align*}
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Mathematica [A] time = 0.01, size = 22, normalized size = 1.00 \[ \frac {x \tan ^{-1}\left (2 \sqrt [4]{x^4}\right )}{2 \sqrt [4]{x^4}} \]
Antiderivative was successfully verified.
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fricas [A] time = 0.95, size = 6, normalized size = 0.27 \[ \frac {1}{2} \, \arctan \left (2 \, x\right ) \]
Verification of antiderivative is not currently implemented for this CAS.
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giac [A] time = 0.15, size = 6, normalized size = 0.27 \[ \frac {1}{2} \, \arctan \left (2 \, x\right ) \]
Verification of antiderivative is not currently implemented for this CAS.
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maple [A] time = 0.05, size = 29, normalized size = 1.32 \[ \frac {\arctan \left (2 \sqrt {\frac {\sqrt {x^{4}}}{x^{2}}}\, x \right )}{2 \sqrt {\frac {\sqrt {x^{4}}}{x^{2}}}} \]
Verification of antiderivative is not currently implemented for this CAS.
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maxima [A] time = 1.36, size = 6, normalized size = 0.27 \[ \frac {1}{2} \, \arctan \left (2 \, x\right ) \]
Verification of antiderivative is not currently implemented for this CAS.
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mupad [F] time = 0.00, size = -1, normalized size = -0.05 \[ \int \frac {1}{4\,\sqrt {x^4}+1} \,d x \]
Verification of antiderivative is not currently implemented for this CAS.
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sympy [A] time = 0.14, size = 5, normalized size = 0.23 \[ \frac {\operatorname {atan}{\left (2 x \right )}}{2} \]
Verification of antiderivative is not currently implemented for this CAS.
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