Integrand size = 16, antiderivative size = 154 \[ \int \frac {\left (a+b \arctan \left (c x^3\right )\right )^2}{x} \, dx=\frac {2}{3} \left (a+b \arctan \left (c x^3\right )\right )^2 \text {arctanh}\left (1-\frac {2}{1+i c x^3}\right )-\frac {1}{3} i b \left (a+b \arctan \left (c x^3\right )\right ) \operatorname {PolyLog}\left (2,1-\frac {2}{1+i c x^3}\right )+\frac {1}{3} i b \left (a+b \arctan \left (c x^3\right )\right ) \operatorname {PolyLog}\left (2,-1+\frac {2}{1+i c x^3}\right )-\frac {1}{6} b^2 \operatorname {PolyLog}\left (3,1-\frac {2}{1+i c x^3}\right )+\frac {1}{6} b^2 \operatorname {PolyLog}\left (3,-1+\frac {2}{1+i c x^3}\right ) \]
-2/3*(a+b*arctan(c*x^3))^2*arctanh(-1+2/(1+I*c*x^3))-1/3*I*b*(a+b*arctan(c *x^3))*polylog(2,1-2/(1+I*c*x^3))+1/3*I*b*(a+b*arctan(c*x^3))*polylog(2,-1 +2/(1+I*c*x^3))-1/6*b^2*polylog(3,1-2/(1+I*c*x^3))+1/6*b^2*polylog(3,-1+2/ (1+I*c*x^3))
Time = 0.18 (sec) , antiderivative size = 201, normalized size of antiderivative = 1.31 \[ \int \frac {\left (a+b \arctan \left (c x^3\right )\right )^2}{x} \, dx=a^2 \log (x)+\frac {1}{3} i a b \left (\operatorname {PolyLog}\left (2,-i c x^3\right )-\operatorname {PolyLog}\left (2,i c x^3\right )\right )+\frac {1}{72} b^2 \left (-i \pi ^3+16 i \arctan \left (c x^3\right )^3+24 \arctan \left (c x^3\right )^2 \log \left (1-e^{-2 i \arctan \left (c x^3\right )}\right )-24 \arctan \left (c x^3\right )^2 \log \left (1+e^{2 i \arctan \left (c x^3\right )}\right )+24 i \arctan \left (c x^3\right ) \operatorname {PolyLog}\left (2,e^{-2 i \arctan \left (c x^3\right )}\right )+24 i \arctan \left (c x^3\right ) \operatorname {PolyLog}\left (2,-e^{2 i \arctan \left (c x^3\right )}\right )+12 \operatorname {PolyLog}\left (3,e^{-2 i \arctan \left (c x^3\right )}\right )-12 \operatorname {PolyLog}\left (3,-e^{2 i \arctan \left (c x^3\right )}\right )\right ) \]
a^2*Log[x] + (I/3)*a*b*(PolyLog[2, (-I)*c*x^3] - PolyLog[2, I*c*x^3]) + (b ^2*((-I)*Pi^3 + (16*I)*ArcTan[c*x^3]^3 + 24*ArcTan[c*x^3]^2*Log[1 - E^((-2 *I)*ArcTan[c*x^3])] - 24*ArcTan[c*x^3]^2*Log[1 + E^((2*I)*ArcTan[c*x^3])] + (24*I)*ArcTan[c*x^3]*PolyLog[2, E^((-2*I)*ArcTan[c*x^3])] + (24*I)*ArcTa n[c*x^3]*PolyLog[2, -E^((2*I)*ArcTan[c*x^3])] + 12*PolyLog[3, E^((-2*I)*Ar cTan[c*x^3])] - 12*PolyLog[3, -E^((2*I)*ArcTan[c*x^3])]))/72
Time = 0.70 (sec) , antiderivative size = 177, normalized size of antiderivative = 1.15, number of steps used = 6, number of rules used = 5, \(\frac {\text {number of rules}}{\text {integrand size}}\) = 0.312, Rules used = {5359, 5357, 5523, 5529, 7164}
Below are the steps used by Rubi to obtain the solution. The rule number used for the transformation is given above next to the arrow. The rules definitions used are listed below.
\(\displaystyle \int \frac {\left (a+b \arctan \left (c x^3\right )\right )^2}{x} \, dx\) |
\(\Big \downarrow \) 5359 |
\(\displaystyle \frac {1}{3} \int \frac {\left (a+b \arctan \left (c x^3\right )\right )^2}{x^3}dx^3\) |
\(\Big \downarrow \) 5357 |
\(\displaystyle \frac {1}{3} \left (2 \text {arctanh}\left (1-\frac {2}{1+i c x^3}\right ) \left (a+b \arctan \left (c x^3\right )\right )^2-4 b c \int \frac {\left (a+b \arctan \left (c x^3\right )\right ) \text {arctanh}\left (1-\frac {2}{i c x^3+1}\right )}{c^2 x^6+1}dx^3\right )\) |
\(\Big \downarrow \) 5523 |
\(\displaystyle \frac {1}{3} \left (2 \text {arctanh}\left (1-\frac {2}{1+i c x^3}\right ) \left (a+b \arctan \left (c x^3\right )\right )^2-4 b c \left (\frac {1}{2} \int \frac {\left (a+b \arctan \left (c x^3\right )\right ) \log \left (2-\frac {2}{i c x^3+1}\right )}{c^2 x^6+1}dx^3-\frac {1}{2} \int \frac {\left (a+b \arctan \left (c x^3\right )\right ) \log \left (\frac {2}{i c x^3+1}\right )}{c^2 x^6+1}dx^3\right )\right )\) |
\(\Big \downarrow \) 5529 |
\(\displaystyle \frac {1}{3} \left (2 \text {arctanh}\left (1-\frac {2}{1+i c x^3}\right ) \left (a+b \arctan \left (c x^3\right )\right )^2-4 b c \left (\frac {1}{2} \left (\frac {i \operatorname {PolyLog}\left (2,1-\frac {2}{i c x^3+1}\right ) \left (a+b \arctan \left (c x^3\right )\right )}{2 c}-\frac {1}{2} i b \int \frac {\operatorname {PolyLog}\left (2,1-\frac {2}{i c x^3+1}\right )}{c^2 x^6+1}dx^3\right )+\frac {1}{2} \left (\frac {1}{2} i b \int \frac {\operatorname {PolyLog}\left (2,\frac {2}{i c x^3+1}-1\right )}{c^2 x^6+1}dx^3-\frac {i \operatorname {PolyLog}\left (2,\frac {2}{i c x^3+1}-1\right ) \left (a+b \arctan \left (c x^3\right )\right )}{2 c}\right )\right )\right )\) |
\(\Big \downarrow \) 7164 |
\(\displaystyle \frac {1}{3} \left (2 \text {arctanh}\left (1-\frac {2}{1+i c x^3}\right ) \left (a+b \arctan \left (c x^3\right )\right )^2-4 b c \left (\frac {1}{2} \left (\frac {i \operatorname {PolyLog}\left (2,1-\frac {2}{i c x^3+1}\right ) \left (a+b \arctan \left (c x^3\right )\right )}{2 c}+\frac {b \operatorname {PolyLog}\left (3,1-\frac {2}{i c x^3+1}\right )}{4 c}\right )+\frac {1}{2} \left (-\frac {i \operatorname {PolyLog}\left (2,\frac {2}{i c x^3+1}-1\right ) \left (a+b \arctan \left (c x^3\right )\right )}{2 c}-\frac {b \operatorname {PolyLog}\left (3,\frac {2}{i c x^3+1}-1\right )}{4 c}\right )\right )\right )\) |
(2*(a + b*ArcTan[c*x^3])^2*ArcTanh[1 - 2/(1 + I*c*x^3)] - 4*b*c*((((I/2)*( a + b*ArcTan[c*x^3])*PolyLog[2, 1 - 2/(1 + I*c*x^3)])/c + (b*PolyLog[3, 1 - 2/(1 + I*c*x^3)])/(4*c))/2 + (((-1/2*I)*(a + b*ArcTan[c*x^3])*PolyLog[2, -1 + 2/(1 + I*c*x^3)])/c - (b*PolyLog[3, -1 + 2/(1 + I*c*x^3)])/(4*c))/2) )/3
3.2.17.3.1 Defintions of rubi rules used
Int[((a_.) + ArcTan[(c_.)*(x_)]*(b_.))^(p_)/(x_), x_Symbol] :> Simp[2*(a + b*ArcTan[c*x])^p*ArcTanh[1 - 2/(1 + I*c*x)], x] - Simp[2*b*c*p Int[(a + b *ArcTan[c*x])^(p - 1)*(ArcTanh[1 - 2/(1 + I*c*x)]/(1 + c^2*x^2)), x], x] /; FreeQ[{a, b, c}, x] && IGtQ[p, 1]
Int[((a_.) + ArcTan[(c_.)*(x_)^(n_)]*(b_.))^(p_.)/(x_), x_Symbol] :> Simp[1 /n Subst[Int[(a + b*ArcTan[c*x])^p/x, x], x, x^n], x] /; FreeQ[{a, b, c, n}, x] && IGtQ[p, 0]
Int[(ArcTanh[u_]*((a_.) + ArcTan[(c_.)*(x_)]*(b_.))^(p_.))/((d_) + (e_.)*(x _)^2), x_Symbol] :> Simp[1/2 Int[Log[1 + u]*((a + b*ArcTan[c*x])^p/(d + e *x^2)), x], x] - Simp[1/2 Int[Log[1 - u]*((a + b*ArcTan[c*x])^p/(d + e*x^ 2)), x], x] /; FreeQ[{a, b, c, d, e}, x] && IGtQ[p, 0] && EqQ[e, c^2*d] && EqQ[u^2 - (1 - 2*(I/(I - c*x)))^2, 0]
Int[(Log[u_]*((a_.) + ArcTan[(c_.)*(x_)]*(b_.))^(p_.))/((d_) + (e_.)*(x_)^2 ), x_Symbol] :> Simp[(-I)*(a + b*ArcTan[c*x])^p*(PolyLog[2, 1 - u]/(2*c*d)) , x] + Simp[b*p*(I/2) Int[(a + b*ArcTan[c*x])^(p - 1)*(PolyLog[2, 1 - u]/ (d + e*x^2)), x], x] /; FreeQ[{a, b, c, d, e}, x] && IGtQ[p, 0] && EqQ[e, c ^2*d] && EqQ[(1 - u)^2 - (1 - 2*(I/(I - c*x)))^2, 0]
Int[(u_)*PolyLog[n_, v_], x_Symbol] :> With[{w = DerivativeDivides[v, u*v, x]}, Simp[w*PolyLog[n + 1, v], x] /; !FalseQ[w]] /; FreeQ[n, x]
\[\int \frac {{\left (a +b \arctan \left (c \,x^{3}\right )\right )}^{2}}{x}d x\]
\[ \int \frac {\left (a+b \arctan \left (c x^3\right )\right )^2}{x} \, dx=\int { \frac {{\left (b \arctan \left (c x^{3}\right ) + a\right )}^{2}}{x} \,d x } \]
\[ \int \frac {\left (a+b \arctan \left (c x^3\right )\right )^2}{x} \, dx=\int \frac {\left (a + b \operatorname {atan}{\left (c x^{3} \right )}\right )^{2}}{x}\, dx \]
\[ \int \frac {\left (a+b \arctan \left (c x^3\right )\right )^2}{x} \, dx=\int { \frac {{\left (b \arctan \left (c x^{3}\right ) + a\right )}^{2}}{x} \,d x } \]
a^2*log(x) + 1/16*integrate((12*b^2*arctan(c*x^3)^2 + b^2*log(c^2*x^6 + 1) ^2 + 32*a*b*arctan(c*x^3))/x, x)
\[ \int \frac {\left (a+b \arctan \left (c x^3\right )\right )^2}{x} \, dx=\int { \frac {{\left (b \arctan \left (c x^{3}\right ) + a\right )}^{2}}{x} \,d x } \]
Timed out. \[ \int \frac {\left (a+b \arctan \left (c x^3\right )\right )^2}{x} \, dx=\int \frac {{\left (a+b\,\mathrm {atan}\left (c\,x^3\right )\right )}^2}{x} \,d x \]