Integrand size = 16, antiderivative size = 229 \[ \int \frac {\left (a+b \arctan \left (c x^2\right )\right )^3}{x} \, dx=\left (a+b \arctan \left (c x^2\right )\right )^3 \text {arctanh}\left (1-\frac {2}{1+i c x^2}\right )-\frac {3}{4} i b \left (a+b \arctan \left (c x^2\right )\right )^2 \operatorname {PolyLog}\left (2,1-\frac {2}{1+i c x^2}\right )+\frac {3}{4} i b \left (a+b \arctan \left (c x^2\right )\right )^2 \operatorname {PolyLog}\left (2,-1+\frac {2}{1+i c x^2}\right )-\frac {3}{4} b^2 \left (a+b \arctan \left (c x^2\right )\right ) \operatorname {PolyLog}\left (3,1-\frac {2}{1+i c x^2}\right )+\frac {3}{4} b^2 \left (a+b \arctan \left (c x^2\right )\right ) \operatorname {PolyLog}\left (3,-1+\frac {2}{1+i c x^2}\right )+\frac {3}{8} i b^3 \operatorname {PolyLog}\left (4,1-\frac {2}{1+i c x^2}\right )-\frac {3}{8} i b^3 \operatorname {PolyLog}\left (4,-1+\frac {2}{1+i c x^2}\right ) \]
-(a+b*arctan(c*x^2))^3*arctanh(-1+2/(1+I*c*x^2))-3/4*I*b*(a+b*arctan(c*x^2 ))^2*polylog(2,1-2/(1+I*c*x^2))+3/4*I*b*(a+b*arctan(c*x^2))^2*polylog(2,-1 +2/(1+I*c*x^2))-3/4*b^2*(a+b*arctan(c*x^2))*polylog(3,1-2/(1+I*c*x^2))+3/4 *b^2*(a+b*arctan(c*x^2))*polylog(3,-1+2/(1+I*c*x^2))+3/8*I*b^3*polylog(4,1 -2/(1+I*c*x^2))-3/8*I*b^3*polylog(4,-1+2/(1+I*c*x^2))
Time = 0.30 (sec) , antiderivative size = 417, normalized size of antiderivative = 1.82 \[ \int \frac {\left (a+b \arctan \left (c x^2\right )\right )^3}{x} \, dx=a^3 \log (x)+\frac {3}{4} i a^2 b \left (\operatorname {PolyLog}\left (2,-i c x^2\right )-\operatorname {PolyLog}\left (2,i c x^2\right )\right )+\frac {1}{16} a b^2 \left (-i \pi ^3+16 i \arctan \left (c x^2\right )^3+24 \arctan \left (c x^2\right )^2 \log \left (1-e^{-2 i \arctan \left (c x^2\right )}\right )-24 \arctan \left (c x^2\right )^2 \log \left (1+e^{2 i \arctan \left (c x^2\right )}\right )+24 i \arctan \left (c x^2\right ) \operatorname {PolyLog}\left (2,e^{-2 i \arctan \left (c x^2\right )}\right )+24 i \arctan \left (c x^2\right ) \operatorname {PolyLog}\left (2,-e^{2 i \arctan \left (c x^2\right )}\right )+12 \operatorname {PolyLog}\left (3,e^{-2 i \arctan \left (c x^2\right )}\right )-12 \operatorname {PolyLog}\left (3,-e^{2 i \arctan \left (c x^2\right )}\right )\right )-\frac {1}{128} i b^3 \left (\pi ^4-32 \arctan \left (c x^2\right )^4+64 i \arctan \left (c x^2\right )^3 \log \left (1-e^{-2 i \arctan \left (c x^2\right )}\right )-64 i \arctan \left (c x^2\right )^3 \log \left (1+e^{2 i \arctan \left (c x^2\right )}\right )-96 \arctan \left (c x^2\right )^2 \operatorname {PolyLog}\left (2,e^{-2 i \arctan \left (c x^2\right )}\right )-96 \arctan \left (c x^2\right )^2 \operatorname {PolyLog}\left (2,-e^{2 i \arctan \left (c x^2\right )}\right )+96 i \arctan \left (c x^2\right ) \operatorname {PolyLog}\left (3,e^{-2 i \arctan \left (c x^2\right )}\right )-96 i \arctan \left (c x^2\right ) \operatorname {PolyLog}\left (3,-e^{2 i \arctan \left (c x^2\right )}\right )+48 \operatorname {PolyLog}\left (4,e^{-2 i \arctan \left (c x^2\right )}\right )+48 \operatorname {PolyLog}\left (4,-e^{2 i \arctan \left (c x^2\right )}\right )\right ) \]
a^3*Log[x] + ((3*I)/4)*a^2*b*(PolyLog[2, (-I)*c*x^2] - PolyLog[2, I*c*x^2] ) + (a*b^2*((-I)*Pi^3 + (16*I)*ArcTan[c*x^2]^3 + 24*ArcTan[c*x^2]^2*Log[1 - E^((-2*I)*ArcTan[c*x^2])] - 24*ArcTan[c*x^2]^2*Log[1 + E^((2*I)*ArcTan[c *x^2])] + (24*I)*ArcTan[c*x^2]*PolyLog[2, E^((-2*I)*ArcTan[c*x^2])] + (24* I)*ArcTan[c*x^2]*PolyLog[2, -E^((2*I)*ArcTan[c*x^2])] + 12*PolyLog[3, E^(( -2*I)*ArcTan[c*x^2])] - 12*PolyLog[3, -E^((2*I)*ArcTan[c*x^2])]))/16 - (I/ 128)*b^3*(Pi^4 - 32*ArcTan[c*x^2]^4 + (64*I)*ArcTan[c*x^2]^3*Log[1 - E^((- 2*I)*ArcTan[c*x^2])] - (64*I)*ArcTan[c*x^2]^3*Log[1 + E^((2*I)*ArcTan[c*x^ 2])] - 96*ArcTan[c*x^2]^2*PolyLog[2, E^((-2*I)*ArcTan[c*x^2])] - 96*ArcTan [c*x^2]^2*PolyLog[2, -E^((2*I)*ArcTan[c*x^2])] + (96*I)*ArcTan[c*x^2]*Poly Log[3, E^((-2*I)*ArcTan[c*x^2])] - (96*I)*ArcTan[c*x^2]*PolyLog[3, -E^((2* I)*ArcTan[c*x^2])] + 48*PolyLog[4, E^((-2*I)*ArcTan[c*x^2])] + 48*PolyLog[ 4, -E^((2*I)*ArcTan[c*x^2])])
Time = 1.04 (sec) , antiderivative size = 267, normalized size of antiderivative = 1.17, number of steps used = 7, number of rules used = 6, \(\frac {\text {number of rules}}{\text {integrand size}}\) = 0.375, Rules used = {5359, 5357, 5523, 5529, 5533, 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.
\(\displaystyle \int \frac {\left (a+b \arctan \left (c x^2\right )\right )^3}{x} \, dx\) |
\(\Big \downarrow \) 5359 |
\(\displaystyle \frac {1}{2} \int \frac {\left (a+b \arctan \left (c x^2\right )\right )^3}{x^2}dx^2\) |
\(\Big \downarrow \) 5357 |
\(\displaystyle \frac {1}{2} \left (2 \text {arctanh}\left (1-\frac {2}{1+i c x^2}\right ) \left (a+b \arctan \left (c x^2\right )\right )^3-6 b c \int \frac {\left (a+b \arctan \left (c x^2\right )\right )^2 \text {arctanh}\left (1-\frac {2}{i c x^2+1}\right )}{c^2 x^4+1}dx^2\right )\) |
\(\Big \downarrow \) 5523 |
\(\displaystyle \frac {1}{2} \left (2 \text {arctanh}\left (1-\frac {2}{1+i c x^2}\right ) \left (a+b \arctan \left (c x^2\right )\right )^3-6 b c \left (\frac {1}{2} \int \frac {\left (a+b \arctan \left (c x^2\right )\right )^2 \log \left (2-\frac {2}{i c x^2+1}\right )}{c^2 x^4+1}dx^2-\frac {1}{2} \int \frac {\left (a+b \arctan \left (c x^2\right )\right )^2 \log \left (\frac {2}{i c x^2+1}\right )}{c^2 x^4+1}dx^2\right )\right )\) |
\(\Big \downarrow \) 5529 |
\(\displaystyle \frac {1}{2} \left (2 \text {arctanh}\left (1-\frac {2}{1+i c x^2}\right ) \left (a+b \arctan \left (c x^2\right )\right )^3-6 b c \left (\frac {1}{2} \left (\frac {i \operatorname {PolyLog}\left (2,1-\frac {2}{i c x^2+1}\right ) \left (a+b \arctan \left (c x^2\right )\right )^2}{2 c}-i b \int \frac {\left (a+b \arctan \left (c x^2\right )\right ) \operatorname {PolyLog}\left (2,1-\frac {2}{i c x^2+1}\right )}{c^2 x^4+1}dx^2\right )+\frac {1}{2} \left (i b \int \frac {\left (a+b \arctan \left (c x^2\right )\right ) \operatorname {PolyLog}\left (2,\frac {2}{i c x^2+1}-1\right )}{c^2 x^4+1}dx^2-\frac {i \operatorname {PolyLog}\left (2,\frac {2}{i c x^2+1}-1\right ) \left (a+b \arctan \left (c x^2\right )\right )^2}{2 c}\right )\right )\right )\) |
\(\Big \downarrow \) 5533 |
\(\displaystyle \frac {1}{2} \left (2 \text {arctanh}\left (1-\frac {2}{1+i c x^2}\right ) \left (a+b \arctan \left (c x^2\right )\right )^3-6 b c \left (\frac {1}{2} \left (\frac {i \operatorname {PolyLog}\left (2,1-\frac {2}{i c x^2+1}\right ) \left (a+b \arctan \left (c x^2\right )\right )^2}{2 c}-i b \left (\frac {i \operatorname {PolyLog}\left (3,1-\frac {2}{i c x^2+1}\right ) \left (a+b \arctan \left (c x^2\right )\right )}{2 c}-\frac {1}{2} i b \int \frac {\operatorname {PolyLog}\left (3,1-\frac {2}{i c x^2+1}\right )}{c^2 x^4+1}dx^2\right )\right )+\frac {1}{2} \left (i b \left (\frac {i \operatorname {PolyLog}\left (3,\frac {2}{i c x^2+1}-1\right ) \left (a+b \arctan \left (c x^2\right )\right )}{2 c}-\frac {1}{2} i b \int \frac {\operatorname {PolyLog}\left (3,\frac {2}{i c x^2+1}-1\right )}{c^2 x^4+1}dx^2\right )-\frac {i \operatorname {PolyLog}\left (2,\frac {2}{i c x^2+1}-1\right ) \left (a+b \arctan \left (c x^2\right )\right )^2}{2 c}\right )\right )\right )\) |
\(\Big \downarrow \) 7164 |
\(\displaystyle \frac {1}{2} \left (2 \text {arctanh}\left (1-\frac {2}{1+i c x^2}\right ) \left (a+b \arctan \left (c x^2\right )\right )^3-6 b c \left (\frac {1}{2} \left (\frac {i \operatorname {PolyLog}\left (2,1-\frac {2}{i c x^2+1}\right ) \left (a+b \arctan \left (c x^2\right )\right )^2}{2 c}-i b \left (\frac {i \operatorname {PolyLog}\left (3,1-\frac {2}{i c x^2+1}\right ) \left (a+b \arctan \left (c x^2\right )\right )}{2 c}+\frac {b \operatorname {PolyLog}\left (4,1-\frac {2}{i c x^2+1}\right )}{4 c}\right )\right )+\frac {1}{2} \left (i b \left (\frac {i \operatorname {PolyLog}\left (3,\frac {2}{i c x^2+1}-1\right ) \left (a+b \arctan \left (c x^2\right )\right )}{2 c}+\frac {b \operatorname {PolyLog}\left (4,\frac {2}{i c x^2+1}-1\right )}{4 c}\right )-\frac {i \operatorname {PolyLog}\left (2,\frac {2}{i c x^2+1}-1\right ) \left (a+b \arctan \left (c x^2\right )\right )^2}{2 c}\right )\right )\right )\) |
(2*(a + b*ArcTan[c*x^2])^3*ArcTanh[1 - 2/(1 + I*c*x^2)] - 6*b*c*((((I/2)*( a + b*ArcTan[c*x^2])^2*PolyLog[2, 1 - 2/(1 + I*c*x^2)])/c - I*b*(((I/2)*(a + b*ArcTan[c*x^2])*PolyLog[3, 1 - 2/(1 + I*c*x^2)])/c + (b*PolyLog[4, 1 - 2/(1 + I*c*x^2)])/(4*c)))/2 + (((-1/2*I)*(a + b*ArcTan[c*x^2])^2*PolyLog[ 2, -1 + 2/(1 + I*c*x^2)])/c + I*b*(((I/2)*(a + b*ArcTan[c*x^2])*PolyLog[3, -1 + 2/(1 + I*c*x^2)])/c + (b*PolyLog[4, -1 + 2/(1 + I*c*x^2)])/(4*c)))/2 ))/2
3.1.88.3.1 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[(((a_.) + ArcTan[(c_.)*(x_)]*(b_.))^(p_.)*PolyLog[k_, u_])/((d_) + (e_. )*(x_)^2), x_Symbol] :> Simp[I*(a + b*ArcTan[c*x])^p*(PolyLog[k + 1, u]/(2* c*d)), x] - Simp[b*p*(I/2) Int[(a + b*ArcTan[c*x])^(p - 1)*(PolyLog[k + 1 , u]/(d + e*x^2)), x], x] /; FreeQ[{a, b, c, d, e, k}, x] && IGtQ[p, 0] && EqQ[e, c^2*d] && EqQ[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]
\[\int \frac {{\left (a +b \arctan \left (c \,x^{2}\right )\right )}^{3}}{x}d x\]
\[ \int \frac {\left (a+b \arctan \left (c x^2\right )\right )^3}{x} \, dx=\int { \frac {{\left (b \arctan \left (c x^{2}\right ) + a\right )}^{3}}{x} \,d x } \]
integral((b^3*arctan(c*x^2)^3 + 3*a*b^2*arctan(c*x^2)^2 + 3*a^2*b*arctan(c *x^2) + a^3)/x, x)
\[ \int \frac {\left (a+b \arctan \left (c x^2\right )\right )^3}{x} \, dx=\int \frac {\left (a + b \operatorname {atan}{\left (c x^{2} \right )}\right )^{3}}{x}\, dx \]
\[ \int \frac {\left (a+b \arctan \left (c x^2\right )\right )^3}{x} \, dx=\int { \frac {{\left (b \arctan \left (c x^{2}\right ) + a\right )}^{3}}{x} \,d x } \]
a^3*log(x) + 1/32*integrate((28*b^3*arctan(c*x^2)^3 + 3*b^3*arctan(c*x^2)* log(c^2*x^4 + 1)^2 + 96*a*b^2*arctan(c*x^2)^2 + 96*a^2*b*arctan(c*x^2))/x, x)
\[ \int \frac {\left (a+b \arctan \left (c x^2\right )\right )^3}{x} \, dx=\int { \frac {{\left (b \arctan \left (c x^{2}\right ) + a\right )}^{3}}{x} \,d x } \]
Timed out. \[ \int \frac {\left (a+b \arctan \left (c x^2\right )\right )^3}{x} \, dx=\int \frac {{\left (a+b\,\mathrm {atan}\left (c\,x^2\right )\right )}^3}{x} \,d x \]