Optimal. Leaf size=238 \[ -\frac {4}{27 x^3}+\frac {1}{864} \sqrt {\frac {1}{6} \left (56673 \sqrt {3}-6073\right )} \log \left (x^2-\sqrt {2 \left (\sqrt {3}-1\right )} x+\sqrt {3}\right )-\frac {1}{864} \sqrt {\frac {1}{6} \left (56673 \sqrt {3}-6073\right )} \log \left (x^2+\sqrt {2 \left (\sqrt {3}-1\right )} x+\sqrt {3}\right )+\frac {25 x \left (5 x^2+7\right )}{216 \left (x^4+2 x^2+3\right )}+\frac {13}{27 x}-\frac {1}{432} \sqrt {\frac {1}{6} \left (6073+56673 \sqrt {3}\right )} \tan ^{-1}\left (\frac {\sqrt {2 \left (\sqrt {3}-1\right )}-2 x}{\sqrt {2 \left (1+\sqrt {3}\right )}}\right )+\frac {1}{432} \sqrt {\frac {1}{6} \left (6073+56673 \sqrt {3}\right )} \tan ^{-1}\left (\frac {2 x+\sqrt {2 \left (\sqrt {3}-1\right )}}{\sqrt {2 \left (1+\sqrt {3}\right )}}\right ) \]
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Rubi [A] time = 0.34, antiderivative size = 238, normalized size of antiderivative = 1.00, number of steps used = 12, number of rules used = 7, integrand size = 31, \(\frac {\text {number of rules}}{\text {integrand size}}\) = 0.226, Rules used = {1669, 1664, 1169, 634, 618, 204, 628} \begin {gather*} \frac {25 x \left (5 x^2+7\right )}{216 \left (x^4+2 x^2+3\right )}-\frac {4}{27 x^3}+\frac {1}{864} \sqrt {\frac {1}{6} \left (56673 \sqrt {3}-6073\right )} \log \left (x^2-\sqrt {2 \left (\sqrt {3}-1\right )} x+\sqrt {3}\right )-\frac {1}{864} \sqrt {\frac {1}{6} \left (56673 \sqrt {3}-6073\right )} \log \left (x^2+\sqrt {2 \left (\sqrt {3}-1\right )} x+\sqrt {3}\right )+\frac {13}{27 x}-\frac {1}{432} \sqrt {\frac {1}{6} \left (6073+56673 \sqrt {3}\right )} \tan ^{-1}\left (\frac {\sqrt {2 \left (\sqrt {3}-1\right )}-2 x}{\sqrt {2 \left (1+\sqrt {3}\right )}}\right )+\frac {1}{432} \sqrt {\frac {1}{6} \left (6073+56673 \sqrt {3}\right )} \tan ^{-1}\left (\frac {2 x+\sqrt {2 \left (\sqrt {3}-1\right )}}{\sqrt {2 \left (1+\sqrt {3}\right )}}\right ) \end {gather*}
Antiderivative was successfully verified.
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Rule 204
Rule 618
Rule 628
Rule 634
Rule 1169
Rule 1664
Rule 1669
Rubi steps
\begin {align*} \int \frac {4+x^2+3 x^4+5 x^6}{x^4 \left (3+2 x^2+x^4\right )^2} \, dx &=\frac {25 x \left (7+5 x^2\right )}{216 \left (3+2 x^2+x^4\right )}+\frac {1}{48} \int \frac {64-\frac {80 x^2}{3}+\frac {50 x^4}{9}+\frac {250 x^6}{9}}{x^4 \left (3+2 x^2+x^4\right )} \, dx\\ &=\frac {25 x \left (7+5 x^2\right )}{216 \left (3+2 x^2+x^4\right )}+\frac {1}{48} \int \left (\frac {64}{3 x^4}-\frac {208}{9 x^2}+\frac {2 \left (137+229 x^2\right )}{9 \left (3+2 x^2+x^4\right )}\right ) \, dx\\ &=-\frac {4}{27 x^3}+\frac {13}{27 x}+\frac {25 x \left (7+5 x^2\right )}{216 \left (3+2 x^2+x^4\right )}+\frac {1}{216} \int \frac {137+229 x^2}{3+2 x^2+x^4} \, dx\\ &=-\frac {4}{27 x^3}+\frac {13}{27 x}+\frac {25 x \left (7+5 x^2\right )}{216 \left (3+2 x^2+x^4\right )}+\frac {\int \frac {137 \sqrt {2 \left (-1+\sqrt {3}\right )}-\left (137-229 \sqrt {3}\right ) x}{\sqrt {3}-\sqrt {2 \left (-1+\sqrt {3}\right )} x+x^2} \, dx}{432 \sqrt {6 \left (-1+\sqrt {3}\right )}}+\frac {\int \frac {137 \sqrt {2 \left (-1+\sqrt {3}\right )}+\left (137-229 \sqrt {3}\right ) x}{\sqrt {3}+\sqrt {2 \left (-1+\sqrt {3}\right )} x+x^2} \, dx}{432 \sqrt {6 \left (-1+\sqrt {3}\right )}}\\ &=-\frac {4}{27 x^3}+\frac {13}{27 x}+\frac {25 x \left (7+5 x^2\right )}{216 \left (3+2 x^2+x^4\right )}+\frac {1}{432} \sqrt {\frac {1}{6} \left (88046+31373 \sqrt {3}\right )} \int \frac {1}{\sqrt {3}-\sqrt {2 \left (-1+\sqrt {3}\right )} x+x^2} \, dx+\frac {1}{432} \sqrt {\frac {1}{6} \left (88046+31373 \sqrt {3}\right )} \int \frac {1}{\sqrt {3}+\sqrt {2 \left (-1+\sqrt {3}\right )} x+x^2} \, dx+\frac {1}{864} \sqrt {\frac {1}{6} \left (-6073+56673 \sqrt {3}\right )} \int \frac {-\sqrt {2 \left (-1+\sqrt {3}\right )}+2 x}{\sqrt {3}-\sqrt {2 \left (-1+\sqrt {3}\right )} x+x^2} \, dx-\frac {1}{864} \sqrt {\frac {1}{6} \left (-6073+56673 \sqrt {3}\right )} \int \frac {\sqrt {2 \left (-1+\sqrt {3}\right )}+2 x}{\sqrt {3}+\sqrt {2 \left (-1+\sqrt {3}\right )} x+x^2} \, dx\\ &=-\frac {4}{27 x^3}+\frac {13}{27 x}+\frac {25 x \left (7+5 x^2\right )}{216 \left (3+2 x^2+x^4\right )}+\frac {1}{864} \sqrt {\frac {1}{6} \left (-6073+56673 \sqrt {3}\right )} \log \left (\sqrt {3}-\sqrt {2 \left (-1+\sqrt {3}\right )} x+x^2\right )-\frac {1}{864} \sqrt {\frac {1}{6} \left (-6073+56673 \sqrt {3}\right )} \log \left (\sqrt {3}+\sqrt {2 \left (-1+\sqrt {3}\right )} x+x^2\right )-\frac {1}{216} \sqrt {\frac {1}{6} \left (88046+31373 \sqrt {3}\right )} \operatorname {Subst}\left (\int \frac {1}{-2 \left (1+\sqrt {3}\right )-x^2} \, dx,x,-\sqrt {2 \left (-1+\sqrt {3}\right )}+2 x\right )-\frac {1}{216} \sqrt {\frac {1}{6} \left (88046+31373 \sqrt {3}\right )} \operatorname {Subst}\left (\int \frac {1}{-2 \left (1+\sqrt {3}\right )-x^2} \, dx,x,\sqrt {2 \left (-1+\sqrt {3}\right )}+2 x\right )\\ &=-\frac {4}{27 x^3}+\frac {13}{27 x}+\frac {25 x \left (7+5 x^2\right )}{216 \left (3+2 x^2+x^4\right )}-\frac {1}{432} \sqrt {\frac {1}{6} \left (6073+56673 \sqrt {3}\right )} \tan ^{-1}\left (\frac {\sqrt {2 \left (-1+\sqrt {3}\right )}-2 x}{\sqrt {2 \left (1+\sqrt {3}\right )}}\right )+\frac {1}{432} \sqrt {\frac {1}{6} \left (6073+56673 \sqrt {3}\right )} \tan ^{-1}\left (\frac {\sqrt {2 \left (-1+\sqrt {3}\right )}+2 x}{\sqrt {2 \left (1+\sqrt {3}\right )}}\right )+\frac {1}{864} \sqrt {\frac {1}{6} \left (-6073+56673 \sqrt {3}\right )} \log \left (\sqrt {3}-\sqrt {2 \left (-1+\sqrt {3}\right )} x+x^2\right )-\frac {1}{864} \sqrt {\frac {1}{6} \left (-6073+56673 \sqrt {3}\right )} \log \left (\sqrt {3}+\sqrt {2 \left (-1+\sqrt {3}\right )} x+x^2\right )\\ \end {align*}
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Mathematica [C] time = 0.29, size = 131, normalized size = 0.55 \begin {gather*} \frac {1}{864} \left (\frac {4 \left (229 x^6+351 x^4+248 x^2-96\right )}{x^3 \left (x^4+2 x^2+3\right )}+\frac {2 \left (229+46 i \sqrt {2}\right ) \tan ^{-1}\left (\frac {x}{\sqrt {1-i \sqrt {2}}}\right )}{\sqrt {1-i \sqrt {2}}}+\frac {2 \left (229-46 i \sqrt {2}\right ) \tan ^{-1}\left (\frac {x}{\sqrt {1+i \sqrt {2}}}\right )}{\sqrt {1+i \sqrt {2}}}\right ) \end {gather*}
Antiderivative was successfully verified.
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IntegrateAlgebraic [F] time = 0.00, size = 0, normalized size = 0.00 \begin {gather*} \int \frac {4+x^2+3 x^4+5 x^6}{x^4 \left (3+2 x^2+x^4\right )^2} \, dx \end {gather*}
Verification is not applicable to the result.
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fricas [B] time = 1.36, size = 528, normalized size = 2.22 \begin {gather*} \frac {2397560030424 \, x^{6} + 3674862754056 \, x^{4} - 277108 \cdot 118956627^{\frac {1}{4}} \sqrt {6297} \sqrt {2} {\left (x^{7} + 2 \, x^{5} + 3 \, x^{3}\right )} \sqrt {6073 \, \sqrt {3} + 170019} \arctan \left (\frac {1}{295480530439458889122} \cdot 118956627^{\frac {3}{4}} \sqrt {81861} \sqrt {6297} \sqrt {3 \cdot 118956627^{\frac {1}{4}} \sqrt {6297} {\left (137 \, \sqrt {3} x - 687 \, x\right )} \sqrt {6073 \, \sqrt {3} + 170019} + 3926135421 \, x^{2} + 3926135421 \, \sqrt {3}} {\left (229 \, \sqrt {3} \sqrt {2} - 137 \, \sqrt {2}\right )} \sqrt {6073 \, \sqrt {3} + 170019} - \frac {1}{16481916497358} \cdot 118956627^{\frac {3}{4}} \sqrt {6297} {\left (229 \, \sqrt {3} \sqrt {2} x - 137 \, \sqrt {2} x\right )} \sqrt {6073 \, \sqrt {3} + 170019} + \frac {1}{2} \, \sqrt {3} \sqrt {2} - \frac {1}{2} \, \sqrt {2}\right ) - 277108 \cdot 118956627^{\frac {1}{4}} \sqrt {6297} \sqrt {2} {\left (x^{7} + 2 \, x^{5} + 3 \, x^{3}\right )} \sqrt {6073 \, \sqrt {3} + 170019} \arctan \left (\frac {1}{295480530439458889122} \cdot 118956627^{\frac {3}{4}} \sqrt {81861} \sqrt {6297} \sqrt {-3 \cdot 118956627^{\frac {1}{4}} \sqrt {6297} {\left (137 \, \sqrt {3} x - 687 \, x\right )} \sqrt {6073 \, \sqrt {3} + 170019} + 3926135421 \, x^{2} + 3926135421 \, \sqrt {3}} {\left (229 \, \sqrt {3} \sqrt {2} - 137 \, \sqrt {2}\right )} \sqrt {6073 \, \sqrt {3} + 170019} - \frac {1}{16481916497358} \cdot 118956627^{\frac {3}{4}} \sqrt {6297} {\left (229 \, \sqrt {3} \sqrt {2} x - 137 \, \sqrt {2} x\right )} \sqrt {6073 \, \sqrt {3} + 170019} - \frac {1}{2} \, \sqrt {3} \sqrt {2} + \frac {1}{2} \, \sqrt {2}\right ) - 118956627^{\frac {1}{4}} \sqrt {6297} {\left (6073 \, x^{7} + 12146 \, x^{5} + 18219 \, x^{3} - 56673 \, \sqrt {3} {\left (x^{7} + 2 \, x^{5} + 3 \, x^{3}\right )}\right )} \sqrt {6073 \, \sqrt {3} + 170019} \log \left (3 \cdot 118956627^{\frac {1}{4}} \sqrt {6297} {\left (137 \, \sqrt {3} x - 687 \, x\right )} \sqrt {6073 \, \sqrt {3} + 170019} + 3926135421 \, x^{2} + 3926135421 \, \sqrt {3}\right ) + 118956627^{\frac {1}{4}} \sqrt {6297} {\left (6073 \, x^{7} + 12146 \, x^{5} + 18219 \, x^{3} - 56673 \, \sqrt {3} {\left (x^{7} + 2 \, x^{5} + 3 \, x^{3}\right )}\right )} \sqrt {6073 \, \sqrt {3} + 170019} \log \left (-3 \cdot 118956627^{\frac {1}{4}} \sqrt {6297} {\left (137 \, \sqrt {3} x - 687 \, x\right )} \sqrt {6073 \, \sqrt {3} + 170019} + 3926135421 \, x^{2} + 3926135421 \, \sqrt {3}\right ) + 2596484225088 \, x^{2} - 1005090667776}{2261454002496 \, {\left (x^{7} + 2 \, x^{5} + 3 \, x^{3}\right )}} \end {gather*}
Verification of antiderivative is not currently implemented for this CAS.
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giac [B] time = 1.85, size = 579, normalized size = 2.43 \begin {gather*} -\frac {1}{559872} \, \sqrt {2} {\left (229 \cdot 3^{\frac {3}{4}} \sqrt {2} {\left (6 \, \sqrt {3} + 18\right )}^{\frac {3}{2}} + 4122 \cdot 3^{\frac {3}{4}} \sqrt {2} \sqrt {6 \, \sqrt {3} + 18} {\left (\sqrt {3} - 3\right )} - 4122 \cdot 3^{\frac {3}{4}} {\left (\sqrt {3} + 3\right )} \sqrt {-6 \, \sqrt {3} + 18} + 229 \cdot 3^{\frac {3}{4}} {\left (-6 \, \sqrt {3} + 18\right )}^{\frac {3}{2}} - 4932 \cdot 3^{\frac {1}{4}} \sqrt {2} \sqrt {6 \, \sqrt {3} + 18} + 4932 \cdot 3^{\frac {1}{4}} \sqrt {-6 \, \sqrt {3} + 18}\right )} \arctan \left (\frac {3^{\frac {3}{4}} {\left (x + 3^{\frac {1}{4}} \sqrt {-\frac {1}{6} \, \sqrt {3} + \frac {1}{2}}\right )}}{3 \, \sqrt {\frac {1}{6} \, \sqrt {3} + \frac {1}{2}}}\right ) - \frac {1}{559872} \, \sqrt {2} {\left (229 \cdot 3^{\frac {3}{4}} \sqrt {2} {\left (6 \, \sqrt {3} + 18\right )}^{\frac {3}{2}} + 4122 \cdot 3^{\frac {3}{4}} \sqrt {2} \sqrt {6 \, \sqrt {3} + 18} {\left (\sqrt {3} - 3\right )} - 4122 \cdot 3^{\frac {3}{4}} {\left (\sqrt {3} + 3\right )} \sqrt {-6 \, \sqrt {3} + 18} + 229 \cdot 3^{\frac {3}{4}} {\left (-6 \, \sqrt {3} + 18\right )}^{\frac {3}{2}} - 4932 \cdot 3^{\frac {1}{4}} \sqrt {2} \sqrt {6 \, \sqrt {3} + 18} + 4932 \cdot 3^{\frac {1}{4}} \sqrt {-6 \, \sqrt {3} + 18}\right )} \arctan \left (\frac {3^{\frac {3}{4}} {\left (x - 3^{\frac {1}{4}} \sqrt {-\frac {1}{6} \, \sqrt {3} + \frac {1}{2}}\right )}}{3 \, \sqrt {\frac {1}{6} \, \sqrt {3} + \frac {1}{2}}}\right ) - \frac {1}{1119744} \, \sqrt {2} {\left (4122 \cdot 3^{\frac {3}{4}} \sqrt {2} {\left (\sqrt {3} + 3\right )} \sqrt {-6 \, \sqrt {3} + 18} - 229 \cdot 3^{\frac {3}{4}} \sqrt {2} {\left (-6 \, \sqrt {3} + 18\right )}^{\frac {3}{2}} + 229 \cdot 3^{\frac {3}{4}} {\left (6 \, \sqrt {3} + 18\right )}^{\frac {3}{2}} + 4122 \cdot 3^{\frac {3}{4}} \sqrt {6 \, \sqrt {3} + 18} {\left (\sqrt {3} - 3\right )} - 4932 \cdot 3^{\frac {1}{4}} \sqrt {2} \sqrt {-6 \, \sqrt {3} + 18} - 4932 \cdot 3^{\frac {1}{4}} \sqrt {6 \, \sqrt {3} + 18}\right )} \log \left (x^{2} + 2 \cdot 3^{\frac {1}{4}} x \sqrt {-\frac {1}{6} \, \sqrt {3} + \frac {1}{2}} + \sqrt {3}\right ) + \frac {1}{1119744} \, \sqrt {2} {\left (4122 \cdot 3^{\frac {3}{4}} \sqrt {2} {\left (\sqrt {3} + 3\right )} \sqrt {-6 \, \sqrt {3} + 18} - 229 \cdot 3^{\frac {3}{4}} \sqrt {2} {\left (-6 \, \sqrt {3} + 18\right )}^{\frac {3}{2}} + 229 \cdot 3^{\frac {3}{4}} {\left (6 \, \sqrt {3} + 18\right )}^{\frac {3}{2}} + 4122 \cdot 3^{\frac {3}{4}} \sqrt {6 \, \sqrt {3} + 18} {\left (\sqrt {3} - 3\right )} - 4932 \cdot 3^{\frac {1}{4}} \sqrt {2} \sqrt {-6 \, \sqrt {3} + 18} - 4932 \cdot 3^{\frac {1}{4}} \sqrt {6 \, \sqrt {3} + 18}\right )} \log \left (x^{2} - 2 \cdot 3^{\frac {1}{4}} x \sqrt {-\frac {1}{6} \, \sqrt {3} + \frac {1}{2}} + \sqrt {3}\right ) + \frac {25 \, {\left (5 \, x^{3} + 7 \, x\right )}}{216 \, {\left (x^{4} + 2 \, x^{2} + 3\right )}} + \frac {13 \, x^{2} - 4}{27 \, x^{3}} \end {gather*}
Verification of antiderivative is not currently implemented for this CAS.
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maple [B] time = 0.04, size = 419, normalized size = 1.76 \begin {gather*} \frac {275 \left (-2+2 \sqrt {3}\right ) \sqrt {3}\, \arctan \left (\frac {2 x -\sqrt {-2+2 \sqrt {3}}}{\sqrt {2+2 \sqrt {3}}}\right )}{2592 \sqrt {2+2 \sqrt {3}}}+\frac {23 \left (-2+2 \sqrt {3}\right ) \arctan \left (\frac {2 x -\sqrt {-2+2 \sqrt {3}}}{\sqrt {2+2 \sqrt {3}}}\right )}{432 \sqrt {2+2 \sqrt {3}}}+\frac {137 \sqrt {3}\, \arctan \left (\frac {2 x -\sqrt {-2+2 \sqrt {3}}}{\sqrt {2+2 \sqrt {3}}}\right )}{648 \sqrt {2+2 \sqrt {3}}}+\frac {275 \left (-2+2 \sqrt {3}\right ) \sqrt {3}\, \arctan \left (\frac {2 x +\sqrt {-2+2 \sqrt {3}}}{\sqrt {2+2 \sqrt {3}}}\right )}{2592 \sqrt {2+2 \sqrt {3}}}+\frac {23 \left (-2+2 \sqrt {3}\right ) \arctan \left (\frac {2 x +\sqrt {-2+2 \sqrt {3}}}{\sqrt {2+2 \sqrt {3}}}\right )}{432 \sqrt {2+2 \sqrt {3}}}+\frac {137 \sqrt {3}\, \arctan \left (\frac {2 x +\sqrt {-2+2 \sqrt {3}}}{\sqrt {2+2 \sqrt {3}}}\right )}{648 \sqrt {2+2 \sqrt {3}}}+\frac {275 \sqrt {-2+2 \sqrt {3}}\, \sqrt {3}\, \ln \left (x^{2}-\sqrt {-2+2 \sqrt {3}}\, x +\sqrt {3}\right )}{5184}+\frac {23 \sqrt {-2+2 \sqrt {3}}\, \ln \left (x^{2}-\sqrt {-2+2 \sqrt {3}}\, x +\sqrt {3}\right )}{864}-\frac {275 \sqrt {-2+2 \sqrt {3}}\, \sqrt {3}\, \ln \left (x^{2}+\sqrt {-2+2 \sqrt {3}}\, x +\sqrt {3}\right )}{5184}-\frac {23 \sqrt {-2+2 \sqrt {3}}\, \ln \left (x^{2}+\sqrt {-2+2 \sqrt {3}}\, x +\sqrt {3}\right )}{864}+\frac {13}{27 x}-\frac {4}{27 x^{3}}+\frac {\frac {125}{8} x^{3}+\frac {175}{8} x}{27 x^{4}+54 x^{2}+81} \end {gather*}
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*} \frac {229 \, x^{6} + 351 \, x^{4} + 248 \, x^{2} - 96}{216 \, {\left (x^{7} + 2 \, x^{5} + 3 \, x^{3}\right )}} + \frac {1}{216} \, \int \frac {229 \, x^{2} + 137}{x^{4} + 2 \, x^{2} + 3}\,{d x} \end {gather*}
Verification of antiderivative is not currently implemented for this CAS.
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mupad [B] time = 0.14, size = 165, normalized size = 0.69 \begin {gather*} \frac {\frac {229\,x^6}{216}+\frac {13\,x^4}{8}+\frac {31\,x^2}{27}-\frac {4}{9}}{x^7+2\,x^5+3\,x^3}-\frac {\mathrm {atan}\left (\frac {x\,\sqrt {-18219-\sqrt {2}\,207831{}\mathrm {i}}\,69277{}\mathrm {i}}{11337408\,\left (-\frac {19051175}{3779136}+\frac {\sqrt {2}\,9490949{}\mathrm {i}}{7558272}\right )}+\frac {69277\,\sqrt {2}\,x\,\sqrt {-18219-\sqrt {2}\,207831{}\mathrm {i}}}{22674816\,\left (-\frac {19051175}{3779136}+\frac {\sqrt {2}\,9490949{}\mathrm {i}}{7558272}\right )}\right )\,\sqrt {-18219-\sqrt {2}\,207831{}\mathrm {i}}\,1{}\mathrm {i}}{1296}+\frac {\mathrm {atan}\left (\frac {x\,\sqrt {-18219+\sqrt {2}\,207831{}\mathrm {i}}\,69277{}\mathrm {i}}{11337408\,\left (\frac {19051175}{3779136}+\frac {\sqrt {2}\,9490949{}\mathrm {i}}{7558272}\right )}-\frac {69277\,\sqrt {2}\,x\,\sqrt {-18219+\sqrt {2}\,207831{}\mathrm {i}}}{22674816\,\left (\frac {19051175}{3779136}+\frac {\sqrt {2}\,9490949{}\mathrm {i}}{7558272}\right )}\right )\,\sqrt {-18219+\sqrt {2}\,207831{}\mathrm {i}}\,1{}\mathrm {i}}{1296} \end {gather*}
Verification of antiderivative is not currently implemented for this CAS.
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sympy [A] time = 0.65, size = 60, normalized size = 0.25 \begin {gather*} \operatorname {RootSum} {\left (2293235712 t^{4} + 12437504 t^{2} + 4405801, \left (t \mapsto t \log {\left (\frac {19707494400 t^{3}}{145412423} + \frac {357152768 t}{145412423} + x \right )} \right )\right )} + \frac {229 x^{6} + 351 x^{4} + 248 x^{2} - 96}{216 x^{7} + 432 x^{5} + 648 x^{3}} \end {gather*}
Verification of antiderivative is not currently implemented for this CAS.
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