Integrand size = 16, antiderivative size = 12 \[ \int \frac {1}{\sqrt {2+5 x^2-7 x^4}} \, dx=\frac {\operatorname {EllipticF}\left (\arcsin (x),-\frac {7}{2}\right )}{\sqrt {2}} \]
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Time = 0.01 (sec) , antiderivative size = 12, normalized size of antiderivative = 1.00, number of steps used = 2, number of rules used = 2, \(\frac {\text {number of rules}}{\text {integrand size}}\) = 0.125, Rules used = {1109, 430} \[ \int \frac {1}{\sqrt {2+5 x^2-7 x^4}} \, dx=\frac {\operatorname {EllipticF}\left (\arcsin (x),-\frac {7}{2}\right )}{\sqrt {2}} \]
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Rule 430
Rule 1109
Rubi steps \begin{align*} \text {integral}& = \left (2 \sqrt {7}\right ) \int \frac {1}{\sqrt {14-14 x^2} \sqrt {4+14 x^2}} \, dx \\ & = \frac {F\left (\sin ^{-1}(x)|-\frac {7}{2}\right )}{\sqrt {2}} \\ \end{align*}
Result contains complex when optimal does not.
Time = 10.03 (sec) , antiderivative size = 65, normalized size of antiderivative = 5.42 \[ \int \frac {1}{\sqrt {2+5 x^2-7 x^4}} \, dx=-\frac {i \sqrt {1-x^2} \sqrt {2+7 x^2} \operatorname {EllipticF}\left (i \text {arcsinh}\left (\sqrt {\frac {7}{2}} x\right ),-\frac {2}{7}\right )}{\sqrt {7} \sqrt {2+5 x^2-7 x^4}} \]
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Both result and optimal contain complex but leaf count of result is larger than twice the leaf count of optimal. 42 vs. \(2 (13 ) = 26\).
Time = 0.63 (sec) , antiderivative size = 43, normalized size of antiderivative = 3.58
method | result | size |
default | \(\frac {\sqrt {-x^{2}+1}\, \sqrt {14 x^{2}+4}\, F\left (x , \frac {i \sqrt {14}}{2}\right )}{2 \sqrt {-7 x^{4}+5 x^{2}+2}}\) | \(43\) |
elliptic | \(\frac {\sqrt {-x^{2}+1}\, \sqrt {14 x^{2}+4}\, F\left (x , \frac {i \sqrt {14}}{2}\right )}{2 \sqrt {-7 x^{4}+5 x^{2}+2}}\) | \(43\) |
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none
Time = 0.08 (sec) , antiderivative size = 9, normalized size of antiderivative = 0.75 \[ \int \frac {1}{\sqrt {2+5 x^2-7 x^4}} \, dx=\frac {1}{2} \, \sqrt {2} F(\arcsin \left (x\right )\,|\,-\frac {7}{2}) \]
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\[ \int \frac {1}{\sqrt {2+5 x^2-7 x^4}} \, dx=\int \frac {1}{\sqrt {- 7 x^{4} + 5 x^{2} + 2}}\, dx \]
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\[ \int \frac {1}{\sqrt {2+5 x^2-7 x^4}} \, dx=\int { \frac {1}{\sqrt {-7 \, x^{4} + 5 \, x^{2} + 2}} \,d x } \]
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\[ \int \frac {1}{\sqrt {2+5 x^2-7 x^4}} \, dx=\int { \frac {1}{\sqrt {-7 \, x^{4} + 5 \, x^{2} + 2}} \,d x } \]
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Timed out. \[ \int \frac {1}{\sqrt {2+5 x^2-7 x^4}} \, dx=\int \frac {1}{\sqrt {-7\,x^4+5\,x^2+2}} \,d x \]
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