Integrand size = 15, antiderivative size = 37 \[ \int \frac {1}{x^4 \left (a^4-x^4\right )} \, dx=-\frac {1}{3 a^4 x^3}+\frac {\arctan \left (\frac {x}{a}\right )}{2 a^7}+\frac {\text {arctanh}\left (\frac {x}{a}\right )}{2 a^7} \]
[Out]
Time = 0.01 (sec) , antiderivative size = 37, normalized size of antiderivative = 1.00, number of steps used = 4, number of rules used = 4, \(\frac {\text {number of rules}}{\text {integrand size}}\) = 0.267, Rules used = {331, 218, 212, 209} \[ \int \frac {1}{x^4 \left (a^4-x^4\right )} \, dx=\frac {\arctan \left (\frac {x}{a}\right )}{2 a^7}+\frac {\text {arctanh}\left (\frac {x}{a}\right )}{2 a^7}-\frac {1}{3 a^4 x^3} \]
[In]
[Out]
Rule 209
Rule 212
Rule 218
Rule 331
Rubi steps \begin{align*} \text {integral}& = -\frac {1}{3 a^4 x^3}+\frac {\int \frac {1}{a^4-x^4} \, dx}{a^4} \\ & = -\frac {1}{3 a^4 x^3}+\frac {\int \frac {1}{a^2-x^2} \, dx}{2 a^6}+\frac {\int \frac {1}{a^2+x^2} \, dx}{2 a^6} \\ & = -\frac {1}{3 a^4 x^3}+\frac {\arctan \left (\frac {x}{a}\right )}{2 a^7}+\frac {\text {arctanh}\left (\frac {x}{a}\right )}{2 a^7} \\ \end{align*}
Time = 0.02 (sec) , antiderivative size = 48, normalized size of antiderivative = 1.30 \[ \int \frac {1}{x^4 \left (a^4-x^4\right )} \, dx=-\frac {1}{3 a^4 x^3}+\frac {\arctan \left (\frac {x}{a}\right )}{2 a^7}-\frac {\log (a-x)}{4 a^7}+\frac {\log (a+x)}{4 a^7} \]
[In]
[Out]
Time = 0.25 (sec) , antiderivative size = 41, normalized size of antiderivative = 1.11
method | result | size |
default | \(-\frac {\ln \left (a -x \right )}{4 a^{7}}+\frac {\arctan \left (\frac {x}{a}\right )}{2 a^{7}}-\frac {1}{3 a^{4} x^{3}}+\frac {\ln \left (a +x \right )}{4 a^{7}}\) | \(41\) |
parallelrisch | \(-\frac {3 i \ln \left (-i a +x \right ) x^{3}-3 i \ln \left (i a +x \right ) x^{3}+3 \ln \left (-a +x \right ) x^{3}-3 \ln \left (a +x \right ) x^{3}+4 a^{3}}{12 a^{7} x^{3}}\) | \(61\) |
risch | \(-\frac {1}{3 a^{4} x^{3}}-\frac {\ln \left (a -x \right )}{4 a^{7}}+\frac {\ln \left (-a -x \right )}{4 a^{7}}+\frac {\left (\munderset {\textit {\_R} =\operatorname {RootOf}\left (a^{14} \textit {\_Z}^{2}+1\right )}{\sum }\textit {\_R} \ln \left (\left (-5 \textit {\_R}^{4} a^{28}+4\right ) x -a^{8} \textit {\_R} \right )\right )}{4}\) | \(71\) |
[In]
[Out]
none
Time = 0.24 (sec) , antiderivative size = 45, normalized size of antiderivative = 1.22 \[ \int \frac {1}{x^4 \left (a^4-x^4\right )} \, dx=\frac {6 \, x^{3} \arctan \left (\frac {x}{a}\right ) + 3 \, x^{3} \log \left (a + x\right ) - 3 \, x^{3} \log \left (-a + x\right ) - 4 \, a^{3}}{12 \, a^{7} x^{3}} \]
[In]
[Out]
Result contains complex when optimal does not.
Time = 0.10 (sec) , antiderivative size = 48, normalized size of antiderivative = 1.30 \[ \int \frac {1}{x^4 \left (a^4-x^4\right )} \, dx=- \frac {1}{3 a^{4} x^{3}} - \frac {\frac {\log {\left (- a + x \right )}}{4} - \frac {\log {\left (a + x \right )}}{4} + \frac {i \log {\left (- i a + x \right )}}{4} - \frac {i \log {\left (i a + x \right )}}{4}}{a^{7}} \]
[In]
[Out]
none
Time = 0.29 (sec) , antiderivative size = 40, normalized size of antiderivative = 1.08 \[ \int \frac {1}{x^4 \left (a^4-x^4\right )} \, dx=\frac {\arctan \left (\frac {x}{a}\right )}{2 \, a^{7}} + \frac {\log \left (a + x\right )}{4 \, a^{7}} - \frac {\log \left (-a + x\right )}{4 \, a^{7}} - \frac {1}{3 \, a^{4} x^{3}} \]
[In]
[Out]
none
Time = 0.28 (sec) , antiderivative size = 42, normalized size of antiderivative = 1.14 \[ \int \frac {1}{x^4 \left (a^4-x^4\right )} \, dx=\frac {\arctan \left (\frac {x}{a}\right )}{2 \, a^{7}} + \frac {\log \left ({\left | a + x \right |}\right )}{4 \, a^{7}} - \frac {\log \left ({\left | -a + x \right |}\right )}{4 \, a^{7}} - \frac {1}{3 \, a^{4} x^{3}} \]
[In]
[Out]
Time = 0.08 (sec) , antiderivative size = 31, normalized size of antiderivative = 0.84 \[ \int \frac {1}{x^4 \left (a^4-x^4\right )} \, dx=\frac {\mathrm {atan}\left (\frac {x}{a}\right )}{2\,a^7}+\frac {\mathrm {atanh}\left (\frac {x}{a}\right )}{2\,a^7}-\frac {1}{3\,a^4\,x^3} \]
[In]
[Out]