Integrand size = 26, antiderivative size = 40 \[ \int \frac {-2+x}{(1+x) \sqrt {1+3 x+a x^2+x^3}} \, dx=-\frac {2 \arctan \left (\frac {\sqrt {3-a} x}{\sqrt {1+3 x+a x^2+x^3}}\right )}{\sqrt {3-a}} \]
[Out]
Result contains higher order function than in optimal. Order 4 vs. order 3 in optimal.
Time = 124.05 (sec) , antiderivative size = 5437, normalized size of antiderivative = 135.92, number of steps used = 13, number of rules used = 11, \(\frac {\text {number of rules}}{\text {integrand size}}\) = 0.423, Rules used = {6874, 2092, 2091, 732, 430, 2106, 2105, 948, 175, 552, 551} \[ \int \frac {-2+x}{(1+x) \sqrt {1+3 x+a x^2+x^3}} \, dx=\frac {\sqrt [3]{2} \sqrt {-2 2^{2/3} a^4+4 \left (2 a^3-27 a-3 \sqrt {3} \sqrt {(a-3)^2 (4 a+15)}+27\right )^{2/3} a^2+36\ 2^{2/3} a^2-\sqrt [3]{2} \left (2 a^3-27 a-3 \sqrt {3} \sqrt {(a-3)^2 (4 a+15)}+27\right )^{4/3}-36 \left (2 a^3-27 a-3 \sqrt {3} \sqrt {(a-3)^2 (4 a+15)}+27\right )^{2/3}-162\ 2^{2/3}} \sqrt {\frac {2 \sqrt [3]{2} a^2+2 \sqrt [3]{2 a^3-27 a-3 \sqrt {3} \sqrt {(a-3)^2 (4 a+15)}+27} a+6 \sqrt [3]{2 a^3-27 a-3 \sqrt {3} \sqrt {(a-3)^2 (4 a+15)}+27} x+\left (4 a^3-54 a-6 \sqrt {3} \sqrt {(a-3)^2 (4 a+15)}+54\right )^{2/3}-18 \sqrt [3]{2}}{6 a^2+3 \sqrt [3]{2} \left (2 a^3-27 a-3 \sqrt {3} \sqrt {(a-3)^2 (4 a+15)}+27\right )^{2/3}-\sqrt [6]{2} \sqrt {3} \sqrt {-2 2^{2/3} a^4+4 \left (2 a^3-27 a-3 \sqrt {3} \sqrt {(a-3)^2 (4 a+15)}+27\right )^{2/3} a^2+36\ 2^{2/3} a^2-\sqrt [3]{2} \left (2 a^3-27 a-3 \sqrt {3} \sqrt {(a-3)^2 (4 a+15)}+27\right )^{4/3}-36 \left (2 a^3-27 a-3 \sqrt {3} \sqrt {(a-3)^2 (4 a+15)}+27\right )^{2/3}-162\ 2^{2/3}}-54}} \sqrt {-\frac {\frac {2 \left (9-a^2\right )^2}{\left (a^3-\frac {27 a}{2}+\frac {3}{2} \left (9-\sqrt {3} \sqrt {(3-a)^2 (4 a+15)}\right )\right )^{2/3}}+2 \left (9-a^2\right )+18 \left (\frac {a}{3}+x\right )^2+\frac {\sqrt [3]{2} \left (-2 a^2-\sqrt [3]{2} \left (2 a^3-27 a-3 \sqrt {3} \sqrt {(3-a)^2 (4 a+15)}+27\right )^{2/3}+18\right ) (a+3 x)}{\sqrt [3]{2 a^3-27 a+3 \left (9-\sqrt {3} \sqrt {(3-a)^2 (4 a+15)}\right )}}+\sqrt [3]{2} \left (2 a^3-27 a-3 \sqrt {3} \sqrt {(3-a)^2 (4 a+15)}+27\right )^{2/3}}{\frac {\left (-2 a^2-\sqrt [3]{2} \left (2 a^3-27 a-3 \sqrt {3} \sqrt {(3-a)^2 (4 a+15)}+27\right )^{2/3}+18\right )^2}{18 \sqrt [3]{2} \left (2 a^3-27 a+3 \left (9-\sqrt {3} \sqrt {(3-a)^2 (4 a+15)}\right )\right )^{2/3}}-\frac {2}{9} \left (\frac {2 \left (9-a^2\right )^2}{\left (a^3-\frac {27 a}{2}+\frac {3}{2} \left (9-\sqrt {3} \sqrt {(3-a)^2 (4 a+15)}\right )\right )^{2/3}}+2 \left (9-a^2\right )+\sqrt [3]{2} \left (2 a^3-27 a-3 \sqrt {3} \sqrt {(3-a)^2 (4 a+15)}+27\right )^{2/3}\right )}} \operatorname {EllipticF}\left (\arcsin \left (\frac {\sqrt {\frac {-2 \sqrt [3]{2} a^2+4 \sqrt [3]{2 a^3-27 a-3 \sqrt {3} \sqrt {(a-3)^2 (4 a+15)}+27} a+12 \sqrt [3]{2 a^3-27 a-3 \sqrt {3} \sqrt {(a-3)^2 (4 a+15)}+27} x-\left (4 a^3-54 a-6 \sqrt {3} \sqrt {(a-3)^2 (4 a+15)}+54\right )^{2/3}+\sqrt {6} \sqrt {-2 2^{2/3} a^4+4 \left (2 a^3-27 a-3 \sqrt {3} \sqrt {(a-3)^2 (4 a+15)}+27\right )^{2/3} a^2+36\ 2^{2/3} a^2-\sqrt [3]{2} \left (2 a^3-27 a-3 \sqrt {3} \sqrt {(a-3)^2 (4 a+15)}+27\right )^{4/3}-36 \left (2 a^3-27 a-3 \sqrt {3} \sqrt {(a-3)^2 (4 a+15)}+27\right )^{2/3}-162\ 2^{2/3}}+18 \sqrt [3]{2}}{\sqrt {-2 2^{2/3} a^4+4 \left (2 a^3-27 a-3 \sqrt {3} \sqrt {(a-3)^2 (4 a+15)}+27\right )^{2/3} a^2+36\ 2^{2/3} a^2-\sqrt [3]{2} \left (2 a^3-27 a-3 \sqrt {3} \sqrt {(a-3)^2 (4 a+15)}+27\right )^{4/3}-36 \left (2 a^3-27 a-3 \sqrt {3} \sqrt {(a-3)^2 (4 a+15)}+27\right )^{2/3}-162\ 2^{2/3}}}}}{2^{3/4} \sqrt [4]{3}}\right ),\frac {2 \sqrt [6]{2} \sqrt {3} \sqrt {-2 2^{2/3} a^4+4 \left (2 a^3-27 a-3 \sqrt {3} \sqrt {(3-a)^2 (4 a+15)}+27\right )^{2/3} a^2+36\ 2^{2/3} a^2-\sqrt [3]{2} \left (2 a^3-27 a-3 \sqrt {3} \sqrt {(3-a)^2 (4 a+15)}+27\right )^{4/3}-36 \left (2 a^3-27 a-3 \sqrt {3} \sqrt {(3-a)^2 (4 a+15)}+27\right )^{2/3}-162\ 2^{2/3}}}{-6 a^2-3 \sqrt [3]{2} \left (2 a^3-27 a-3 \sqrt {3} \sqrt {(3-a)^2 (4 a+15)}+27\right )^{2/3}+\sqrt [6]{2} \sqrt {3} \sqrt {-2 2^{2/3} a^4+4 \left (2 a^3-27 a-3 \sqrt {3} \sqrt {(3-a)^2 (4 a+15)}+27\right )^{2/3} a^2+36\ 2^{2/3} a^2-\sqrt [3]{2} \left (2 a^3-27 a-3 \sqrt {3} \sqrt {(3-a)^2 (4 a+15)}+27\right )^{4/3}-36 \left (2 a^3-27 a-3 \sqrt {3} \sqrt {(3-a)^2 (4 a+15)}+27\right )^{2/3}-162\ 2^{2/3}}+54}\right )}{3 \sqrt {3} \sqrt [3]{2 a^3-27 a-3 \sqrt {3} \sqrt {(a-3)^2 (4 a+15)}+27} \sqrt {x^3+a x^2+3 x+1}}-\frac {6 \sqrt [6]{2} \sqrt {3} \sqrt {6 a^2+3 \sqrt [3]{2} \left (2 a^3-27 a-3 \sqrt {3} \sqrt {(3-a)^2 (4 a+15)}+27\right )^{2/3}+\sqrt [6]{2} \sqrt {3} \sqrt {-2 2^{2/3} a^4+4 \left (2 a^3-27 a-3 \sqrt {3} \sqrt {(3-a)^2 (4 a+15)}+27\right )^{2/3} a^2+36\ 2^{2/3} a^2-\sqrt [3]{2} \left (2 a^3-27 a-3 \sqrt {3} \sqrt {(3-a)^2 (4 a+15)}+27\right )^{4/3}-36 \left (2 a^3-27 a-3 \sqrt {3} \sqrt {(3-a)^2 (4 a+15)}+27\right )^{2/3}-162\ 2^{2/3}}-54} \sqrt {\frac {a}{3}+\frac {2 a^2+\sqrt [3]{2} \left (2 a^3-27 a-3 \sqrt {3} \sqrt {(a-3)^2 (4 a+15)}+27\right )^{2/3}-18}{3\ 2^{2/3} \sqrt [3]{2 a^3-27 a-3 \sqrt {3} \sqrt {(a-3)^2 (4 a+15)}+27}}+x} \sqrt {-\frac {2 a^2+\sqrt [3]{2} \left (2 a^3-27 a-3 \sqrt {3} \sqrt {(a-3)^2 (4 a+15)}+27\right )^{2/3}-18}{\sqrt [3]{a^3-\frac {27 a}{2}-\frac {3}{2} \left (\sqrt {3} \sqrt {(a-3)^2 (4 a+15)}-9\right )}}+4 (a+3 x)-\frac {\sqrt {6} \sqrt {-2 2^{2/3} a^4+4 \left (2 a^3-27 a-3 \sqrt {3} \sqrt {(a-3)^2 (4 a+15)}+27\right )^{2/3} a^2+36\ 2^{2/3} a^2-\sqrt [3]{2} \left (2 a^3-27 a-3 \sqrt {3} \sqrt {(a-3)^2 (4 a+15)}+27\right )^{4/3}-36 \left (2 a^3-27 a-3 \sqrt {3} \sqrt {(a-3)^2 (4 a+15)}+27\right )^{2/3}-162\ 2^{2/3}}}{\sqrt [3]{2 a^3-27 a-3 \sqrt {3} \sqrt {(a-3)^2 (4 a+15)}+27}}} \sqrt {-\frac {2 a^2+\sqrt [3]{2} \left (2 a^3-27 a-3 \sqrt {3} \sqrt {(a-3)^2 (4 a+15)}+27\right )^{2/3}-18}{\sqrt [3]{a^3-\frac {27 a}{2}-\frac {3}{2} \left (\sqrt {3} \sqrt {(a-3)^2 (4 a+15)}-9\right )}}+4 (a+3 x)+\frac {\sqrt {6} \sqrt {-2 2^{2/3} a^4+4 \left (2 a^3-27 a-3 \sqrt {3} \sqrt {(a-3)^2 (4 a+15)}+27\right )^{2/3} a^2+36\ 2^{2/3} a^2-\sqrt [3]{2} \left (2 a^3-27 a-3 \sqrt {3} \sqrt {(a-3)^2 (4 a+15)}+27\right )^{4/3}-36 \left (2 a^3-27 a-3 \sqrt {3} \sqrt {(a-3)^2 (4 a+15)}+27\right )^{2/3}-162\ 2^{2/3}}}{\sqrt [3]{2 a^3-27 a-3 \sqrt {3} \sqrt {(a-3)^2 (4 a+15)}+27}}} \sqrt {1-\frac {2 \left (-2 a^2-2^{2/3} \sqrt [3]{2 a^3-27 a-3 \sqrt {3} \sqrt {(a-3)^2 (4 a+15)}+27} (a+3 x)-\sqrt [3]{2} \left (2 a^3-27 a-3 \sqrt {3} \sqrt {(a-3)^2 (4 a+15)}+27\right )^{2/3}+18\right )}{-6 a^2-3 \sqrt [3]{2} \left (2 a^3-27 a-3 \sqrt {3} \sqrt {(a-3)^2 (4 a+15)}+27\right )^{2/3}+\sqrt [6]{2} \sqrt {3} \sqrt {-2 2^{2/3} a^4+4 \left (2 a^3-27 a-3 \sqrt {3} \sqrt {(a-3)^2 (4 a+15)}+27\right )^{2/3} a^2+36\ 2^{2/3} a^2-\sqrt [3]{2} \left (2 a^3-27 a-3 \sqrt {3} \sqrt {(a-3)^2 (4 a+15)}+27\right )^{4/3}-36 \left (2 a^3-27 a-3 \sqrt {3} \sqrt {(a-3)^2 (4 a+15)}+27\right )^{2/3}-162\ 2^{2/3}}+54}} \sqrt {\frac {2 \left (-2 a^2-2^{2/3} \sqrt [3]{2 a^3-27 a-3 \sqrt {3} \sqrt {(a-3)^2 (4 a+15)}+27} (a+3 x)-\sqrt [3]{2} \left (2 a^3-27 a-3 \sqrt {3} \sqrt {(a-3)^2 (4 a+15)}+27\right )^{2/3}+18\right )}{6 a^2+3 \sqrt [3]{2} \left (2 a^3-27 a-3 \sqrt {3} \sqrt {(a-3)^2 (4 a+15)}+27\right )^{2/3}+\sqrt [6]{2} \sqrt {3} \sqrt {-2 2^{2/3} a^4+4 \left (2 a^3-27 a-3 \sqrt {3} \sqrt {(a-3)^2 (4 a+15)}+27\right )^{2/3} a^2+36\ 2^{2/3} a^2-\sqrt [3]{2} \left (2 a^3-27 a-3 \sqrt {3} \sqrt {(a-3)^2 (4 a+15)}+27\right )^{4/3}-36 \left (2 a^3-27 a-3 \sqrt {3} \sqrt {(a-3)^2 (4 a+15)}+27\right )^{2/3}-162\ 2^{2/3}}-54}+1} \operatorname {EllipticPi}\left (\frac {-6 a^2-3 \sqrt [3]{2} \left (2 a^3-27 a-3 \sqrt {3} \sqrt {(3-a)^2 (4 a+15)}+27\right )^{2/3}-\sqrt [6]{2} \sqrt {3} \sqrt {-2 2^{2/3} a^4+4 \left (2 a^3-27 a-3 \sqrt {3} \sqrt {(3-a)^2 (4 a+15)}+27\right )^{2/3} a^2+36\ 2^{2/3} a^2-\sqrt [3]{2} \left (2 a^3-27 a-3 \sqrt {3} \sqrt {(3-a)^2 (4 a+15)}+27\right )^{4/3}-36 \left (2 a^3-27 a-3 \sqrt {3} \sqrt {(3-a)^2 (4 a+15)}+27\right )^{2/3}-162\ 2^{2/3}}+54}{2 \left (-2 a^2-2^{2/3} \sqrt [3]{2 a^3-27 a-3 \sqrt {3} \sqrt {(3-a)^2 (4 a+15)}+27} a-\sqrt [3]{2} \left (2 a^3-27 a-3 \sqrt {3} \sqrt {(3-a)^2 (4 a+15)}+27\right )^{2/3}+3\ 2^{2/3} \sqrt [3]{2 a^3-27 a-3 \sqrt {3} \sqrt {(3-a)^2 (4 a+15)}+27}+18\right )},\arcsin \left (\frac {\sqrt [3]{2} \sqrt [6]{2 a^3-27 a-3 \sqrt {3} \sqrt {(3-a)^2 (4 a+15)}+27} \sqrt {\frac {2 a^2+\sqrt [3]{2} \left (2 a^3-27 a-3 \sqrt {3} \sqrt {(a-3)^2 (4 a+15)}+27\right )^{2/3}-18}{\sqrt [3]{a^3-\frac {27 a}{2}-\frac {3}{2} \left (\sqrt {3} \sqrt {(a-3)^2 (4 a+15)}-9\right )}}+2 (a+3 x)}}{\sqrt {6 a^2+3 \sqrt [3]{2} \left (2 a^3-27 a-3 \sqrt {3} \sqrt {(3-a)^2 (4 a+15)}+27\right )^{2/3}+\sqrt [6]{2} \sqrt {3} \sqrt {-2 2^{2/3} a^4+4 \left (2 a^3-27 a-3 \sqrt {3} \sqrt {(3-a)^2 (4 a+15)}+27\right )^{2/3} a^2+36\ 2^{2/3} a^2-\sqrt [3]{2} \left (2 a^3-27 a-3 \sqrt {3} \sqrt {(3-a)^2 (4 a+15)}+27\right )^{4/3}-36 \left (2 a^3-27 a-3 \sqrt {3} \sqrt {(3-a)^2 (4 a+15)}+27\right )^{2/3}-162\ 2^{2/3}}-54}}\right ),\frac {-6 a^2-3 \sqrt [3]{2} \left (2 a^3-27 a-3 \sqrt {3} \sqrt {(3-a)^2 (4 a+15)}+27\right )^{2/3}-\sqrt [6]{2} \sqrt {3} \sqrt {-2 2^{2/3} a^4+4 \left (2 a^3-27 a-3 \sqrt {3} \sqrt {(3-a)^2 (4 a+15)}+27\right )^{2/3} a^2+36\ 2^{2/3} a^2-\sqrt [3]{2} \left (2 a^3-27 a-3 \sqrt {3} \sqrt {(3-a)^2 (4 a+15)}+27\right )^{4/3}-36 \left (2 a^3-27 a-3 \sqrt {3} \sqrt {(3-a)^2 (4 a+15)}+27\right )^{2/3}-162\ 2^{2/3}}+54}{-6 a^2-3 \sqrt [3]{2} \left (2 a^3-27 a-3 \sqrt {3} \sqrt {(3-a)^2 (4 a+15)}+27\right )^{2/3}+\sqrt [6]{2} \sqrt {3} \sqrt {-2 2^{2/3} a^4+4 \left (2 a^3-27 a-3 \sqrt {3} \sqrt {(3-a)^2 (4 a+15)}+27\right )^{2/3} a^2+36\ 2^{2/3} a^2-\sqrt [3]{2} \left (2 a^3-27 a-3 \sqrt {3} \sqrt {(3-a)^2 (4 a+15)}+27\right )^{4/3}-36 \left (2 a^3-27 a-3 \sqrt {3} \sqrt {(3-a)^2 (4 a+15)}+27\right )^{2/3}-162\ 2^{2/3}}+54}\right )}{\sqrt [6]{2 a^3-27 a+3 \left (9-\sqrt {3} \sqrt {(3-a)^2 (4 a+15)}\right )} \left (-2 a+\frac {-2 a^2-\sqrt [3]{2} \left (2 a^3-27 a-3 \sqrt {3} \sqrt {(3-a)^2 (4 a+15)}+27\right )^{2/3}+18}{\sqrt [3]{a^3-\frac {27 a}{2}+\frac {3}{2} \left (9-\sqrt {3} \sqrt {(3-a)^2 (4 a+15)}\right )}}+6\right ) \sqrt {x^3+a x^2+3 x+1} \sqrt {\frac {-2 \sqrt [3]{2} a^2+4 \sqrt [3]{2 a^3-27 a-3 \sqrt {3} \sqrt {(a-3)^2 (4 a+15)}+27} (a+3 x)-\left (4 a^3-54 a-6 \sqrt {3} \sqrt {(a-3)^2 (4 a+15)}+54\right )^{2/3}-\sqrt {6} \sqrt {-2 2^{2/3} a^4+4 \left (2 a^3-27 a-3 \sqrt {3} \sqrt {(a-3)^2 (4 a+15)}+27\right )^{2/3} a^2+36\ 2^{2/3} a^2-\sqrt [3]{2} \left (2 a^3-27 a-3 \sqrt {3} \sqrt {(a-3)^2 (4 a+15)}+27\right )^{4/3}-36 \left (2 a^3-27 a-3 \sqrt {3} \sqrt {(a-3)^2 (4 a+15)}+27\right )^{2/3}-162\ 2^{2/3}}+18 \sqrt [3]{2}}{\sqrt [3]{2 a^3-27 a-3 \sqrt {3} \sqrt {(a-3)^2 (4 a+15)}+27}}} \sqrt {\frac {-2 \sqrt [3]{2} a^2+4 \sqrt [3]{2 a^3-27 a-3 \sqrt {3} \sqrt {(a-3)^2 (4 a+15)}+27} (a+3 x)-\left (4 a^3-54 a-6 \sqrt {3} \sqrt {(a-3)^2 (4 a+15)}+54\right )^{2/3}+\sqrt {6} \sqrt {-2 2^{2/3} a^4+4 \left (2 a^3-27 a-3 \sqrt {3} \sqrt {(a-3)^2 (4 a+15)}+27\right )^{2/3} a^2+36\ 2^{2/3} a^2-\sqrt [3]{2} \left (2 a^3-27 a-3 \sqrt {3} \sqrt {(a-3)^2 (4 a+15)}+27\right )^{4/3}-36 \left (2 a^3-27 a-3 \sqrt {3} \sqrt {(a-3)^2 (4 a+15)}+27\right )^{2/3}-162\ 2^{2/3}}+18 \sqrt [3]{2}}{\sqrt [3]{2 a^3-27 a-3 \sqrt {3} \sqrt {(a-3)^2 (4 a+15)}+27}}}} \]
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Rule 175
Rule 430
Rule 551
Rule 552
Rule 732
Rule 948
Rule 2091
Rule 2092
Rule 2105
Rule 2106
Rule 6874
Rubi steps \begin{align*} \text {integral}& = \int \left (\frac {1}{\sqrt {1+3 x+a x^2+x^3}}-\frac {3}{(1+x) \sqrt {1+3 x+a x^2+x^3}}\right ) \, dx \\ & = -\left (3 \int \frac {1}{(1+x) \sqrt {1+3 x+a x^2+x^3}} \, dx\right )+\int \frac {1}{\sqrt {1+3 x+a x^2+x^3}} \, dx \\ & = -\left (3 \text {Subst}\left (\int \frac {1}{\left (\frac {3-a}{3}+x\right ) \sqrt {\frac {1}{27} \left (27-27 a+2 a^3\right )+\frac {1}{3} \left (9-a^2\right ) x+x^3}} \, dx,x,\frac {a}{3}+x\right )\right )+\text {Subst}\left (\int \frac {1}{\sqrt {\frac {1}{27} \left (27-27 a+2 a^3\right )+\frac {1}{3} \left (9-a^2\right ) x+x^3}} \, dx,x,\frac {a}{3}+x\right ) \\ & = \frac {\left (\sqrt {\frac {a}{3}+\frac {-18+2 a^2+\sqrt [3]{2} \left (27-27 a+2 a^3-3 \sqrt {3} \sqrt {(-3+a)^2 (15+4 a)}\right )^{2/3}}{3\ 2^{2/3} \sqrt [3]{27-27 a+2 a^3-3 \sqrt {3} \sqrt {(-3+a)^2 (15+4 a)}}}+x} \sqrt {2 \left (9-a^2\right )+\sqrt [3]{2} \left (27-27 a+2 a^3-3 \sqrt {3} \sqrt {(3-a)^2 (15+4 a)}\right )^{2/3}+\frac {2 \left (9-a^2\right )^2}{\left (-\frac {27 a}{2}+a^3+\frac {3}{2} \left (9-\sqrt {3} \sqrt {(3-a)^2 (15+4 a)}\right )\right )^{2/3}}+18 \left (\frac {a}{3}+x\right )^2+\frac {\sqrt [3]{2} \left (18-2 a^2-\sqrt [3]{2} \left (27-27 a+2 a^3-3 \sqrt {3} \sqrt {(3-a)^2 (15+4 a)}\right )^{2/3}\right ) (a+3 x)}{\sqrt [3]{-27 a+2 a^3+3 \left (9-\sqrt {3} \sqrt {(3-a)^2 (15+4 a)}\right )}}}\right ) \text {Subst}\left (\int \frac {1}{\sqrt {-\frac {18-2 a^2-\sqrt [3]{2} \left (27-27 a+2 a^3-3 \sqrt {3} \sqrt {(3-a)^2 (15+4 a)}\right )^{2/3}}{3\ 2^{2/3} \sqrt [3]{27-27 a+2 a^3-3 \sqrt {3} \sqrt {(3-a)^2 (15+4 a)}}}+x} \sqrt {\frac {1}{18} \left (2 \left (9-a^2\right )+\sqrt [3]{2} \left (27-27 a+2 a^3-3 \sqrt {3} \sqrt {(3-a)^2 (15+4 a)}\right )^{2/3}+\frac {2 \left (9-a^2\right )^2}{\left (-\frac {27 a}{2}+a^3+\frac {3}{2} \left (9-\sqrt {3} \sqrt {(3-a)^2 (15+4 a)}\right )\right )^{2/3}}\right )+\frac {\left (18-2 a^2-\sqrt [3]{2} \left (27-27 a+2 a^3-3 \sqrt {3} \sqrt {(3-a)^2 (15+4 a)}\right )^{2/3}\right ) x}{3\ 2^{2/3} \sqrt [3]{-27 a+2 a^3+3 \left (9-\sqrt {3} \sqrt {(3-a)^2 (15+4 a)}\right )}}+x^2}} \, dx,x,\frac {a}{3}+x\right )}{3 \sqrt {2} \sqrt {1+3 x+a x^2+x^3}}-\frac {\left (\sqrt {\frac {a}{3}+\frac {-18+2 a^2+\sqrt [3]{2} \left (27-27 a+2 a^3-3 \sqrt {3} \sqrt {(-3+a)^2 (15+4 a)}\right )^{2/3}}{3\ 2^{2/3} \sqrt [3]{27-27 a+2 a^3-3 \sqrt {3} \sqrt {(-3+a)^2 (15+4 a)}}}+x} \sqrt {2 \left (9-a^2\right )+\sqrt [3]{2} \left (27-27 a+2 a^3-3 \sqrt {3} \sqrt {(3-a)^2 (15+4 a)}\right )^{2/3}+\frac {2 \left (9-a^2\right )^2}{\left (-\frac {27 a}{2}+a^3+\frac {3}{2} \left (9-\sqrt {3} \sqrt {(3-a)^2 (15+4 a)}\right )\right )^{2/3}}+18 \left (\frac {a}{3}+x\right )^2+\frac {\sqrt [3]{2} \left (18-2 a^2-\sqrt [3]{2} \left (27-27 a+2 a^3-3 \sqrt {3} \sqrt {(3-a)^2 (15+4 a)}\right )^{2/3}\right ) (a+3 x)}{\sqrt [3]{-27 a+2 a^3+3 \left (9-\sqrt {3} \sqrt {(3-a)^2 (15+4 a)}\right )}}}\right ) \text {Subst}\left (\int \frac {1}{\left (\frac {3-a}{3}+x\right ) \sqrt {-\frac {18-2 a^2-\sqrt [3]{2} \left (27-27 a+2 a^3-3 \sqrt {3} \sqrt {(3-a)^2 (15+4 a)}\right )^{2/3}}{3\ 2^{2/3} \sqrt [3]{27-27 a+2 a^3-3 \sqrt {3} \sqrt {(3-a)^2 (15+4 a)}}}+x} \sqrt {\frac {1}{18} \left (2 \left (9-a^2\right )+\sqrt [3]{2} \left (27-27 a+2 a^3-3 \sqrt {3} \sqrt {(3-a)^2 (15+4 a)}\right )^{2/3}+\frac {2 \left (9-a^2\right )^2}{\left (-\frac {27 a}{2}+a^3+\frac {3}{2} \left (9-\sqrt {3} \sqrt {(3-a)^2 (15+4 a)}\right )\right )^{2/3}}\right )+\frac {\left (18-2 a^2-\sqrt [3]{2} \left (27-27 a+2 a^3-3 \sqrt {3} \sqrt {(3-a)^2 (15+4 a)}\right )^{2/3}\right ) x}{3\ 2^{2/3} \sqrt [3]{-27 a+2 a^3+3 \left (9-\sqrt {3} \sqrt {(3-a)^2 (15+4 a)}\right )}}+x^2}} \, dx,x,\frac {a}{3}+x\right )}{\sqrt {2} \sqrt {1+3 x+a x^2+x^3}} \\ & = \text {Too large to display} \\ \end{align*}
Time = 0.09 (sec) , antiderivative size = 40, normalized size of antiderivative = 1.00 \[ \int \frac {-2+x}{(1+x) \sqrt {1+3 x+a x^2+x^3}} \, dx=-\frac {2 \arctan \left (\frac {\sqrt {3-a} x}{\sqrt {1+3 x+a x^2+x^3}}\right )}{\sqrt {3-a}} \]
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Time = 5.45 (sec) , antiderivative size = 33, normalized size of antiderivative = 0.82
method | result | size |
default | \(-\frac {2 \,\operatorname {arctanh}\left (\frac {\sqrt {a \,x^{2}+x^{3}+3 x +1}}{x \sqrt {-3+a}}\right )}{\sqrt {-3+a}}\) | \(33\) |
pseudoelliptic | \(-\frac {2 \,\operatorname {arctanh}\left (\frac {\sqrt {a \,x^{2}+x^{3}+3 x +1}}{x \sqrt {-3+a}}\right )}{\sqrt {-3+a}}\) | \(33\) |
elliptic | \(\text {Expression too large to display}\) | \(3006\) |
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Leaf count of result is larger than twice the leaf count of optimal. 89 vs. \(2 (34) = 68\).
Time = 0.28 (sec) , antiderivative size = 221, normalized size of antiderivative = 5.52 \[ \int \frac {-2+x}{(1+x) \sqrt {1+3 x+a x^2+x^3}} \, dx=\left [\frac {\log \left (\frac {2 \, {\left (4 \, a - 9\right )} x^{5} + x^{6} + {\left (8 \, a^{2} - 24 \, a + 15\right )} x^{4} + 4 \, {\left (6 \, a - 13\right )} x^{3} + {\left (8 \, a - 9\right )} x^{2} - 4 \, {\left ({\left (2 \, a - 3\right )} x^{3} + x^{4} + 3 \, x^{2} + x\right )} \sqrt {a x^{2} + x^{3} + 3 \, x + 1} \sqrt {a - 3} + 6 \, x + 1}{x^{6} + 6 \, x^{5} + 15 \, x^{4} + 20 \, x^{3} + 15 \, x^{2} + 6 \, x + 1}\right )}{2 \, \sqrt {a - 3}}, \frac {\sqrt {-a + 3} \arctan \left (\frac {{\left ({\left (2 \, a - 3\right )} x^{2} + x^{3} + 3 \, x + 1\right )} \sqrt {a x^{2} + x^{3} + 3 \, x + 1} \sqrt {-a + 3}}{2 \, {\left ({\left (a - 3\right )} x^{4} + {\left (a^{2} - 3 \, a\right )} x^{3} + 3 \, {\left (a - 3\right )} x^{2} + {\left (a - 3\right )} x\right )}}\right )}{a - 3}\right ] \]
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\[ \int \frac {-2+x}{(1+x) \sqrt {1+3 x+a x^2+x^3}} \, dx=\int \frac {x - 2}{\left (x + 1\right ) \sqrt {a x^{2} + x^{3} + 3 x + 1}}\, dx \]
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\[ \int \frac {-2+x}{(1+x) \sqrt {1+3 x+a x^2+x^3}} \, dx=\int { \frac {x - 2}{\sqrt {a x^{2} + x^{3} + 3 \, x + 1} {\left (x + 1\right )}} \,d x } \]
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\[ \int \frac {-2+x}{(1+x) \sqrt {1+3 x+a x^2+x^3}} \, dx=\int { \frac {x - 2}{\sqrt {a x^{2} + x^{3} + 3 \, x + 1} {\left (x + 1\right )}} \,d x } \]
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Time = 5.63 (sec) , antiderivative size = 62, normalized size of antiderivative = 1.55 \[ \int \frac {-2+x}{(1+x) \sqrt {1+3 x+a x^2+x^3}} \, dx=\frac {\ln \left (\frac {\left (\sqrt {x^3+a\,x^2+3\,x+1}+x\,\sqrt {a-3}\right )\,{\left (\sqrt {x^3+a\,x^2+3\,x+1}-x\,\sqrt {a-3}\right )}^3}{{\left (x+1\right )}^6}\right )}{\sqrt {a-3}} \]
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