\(\int \frac {(a+b \arctan (c x^3))^3}{x} \, dx\) [124]

Optimal result

Integrand size = 16, antiderivative size = 232 \[ \int \frac {\left (a+b \arctan \left (c x^3\right )\right )^3}{x} \, dx=\frac {2}{3} \left (a+b \arctan \left (c x^3\right )\right )^3 \text {arctanh}\left (1-\frac {2}{1+i c x^3}\right )-\frac {1}{2} i b \left (a+b \arctan \left (c x^3\right )\right )^2 \operatorname {PolyLog}\left (2,1-\frac {2}{1+i c x^3}\right )+\frac {1}{2} i b \left (a+b \arctan \left (c x^3\right )\right )^2 \operatorname {PolyLog}\left (2,-1+\frac {2}{1+i c x^3}\right )-\frac {1}{2} b^2 \left (a+b \arctan \left (c x^3\right )\right ) \operatorname {PolyLog}\left (3,1-\frac {2}{1+i c x^3}\right )+\frac {1}{2} b^2 \left (a+b \arctan \left (c x^3\right )\right ) \operatorname {PolyLog}\left (3,-1+\frac {2}{1+i c x^3}\right )+\frac {1}{4} i b^3 \operatorname {PolyLog}\left (4,1-\frac {2}{1+i c x^3}\right )-\frac {1}{4} i b^3 \operatorname {PolyLog}\left (4,-1+\frac {2}{1+i c x^3}\right ) \] Output:

-2/3*(a+b*arctan(c*x^3))^3*arctanh(-1+2/(1+I*c*x^3))-1/2*I*b*(a+b*arctan(c 
*x^3))^2*polylog(2,1-2/(1+I*c*x^3))+1/2*I*b*(a+b*arctan(c*x^3))^2*polylog( 
2,-1+2/(1+I*c*x^3))-1/2*b^2*(a+b*arctan(c*x^3))*polylog(3,1-2/(1+I*c*x^3)) 
+1/2*b^2*(a+b*arctan(c*x^3))*polylog(3,-1+2/(1+I*c*x^3))+1/4*I*b^3*polylog 
(4,1-2/(1+I*c*x^3))-1/4*I*b^3*polylog(4,-1+2/(1+I*c*x^3))
 

Mathematica [A] (verified)

Time = 0.18 (sec) , antiderivative size = 421, normalized size of antiderivative = 1.81 \[ \int \frac {\left (a+b \arctan \left (c x^3\right )\right )^3}{x} \, dx=a^3 \log (x)+\frac {1}{2} i a^2 b \left (\operatorname {PolyLog}\left (2,-i c x^3\right )-\operatorname {PolyLog}\left (2,i c x^3\right )\right )+a b^2 \left (-\frac {i \pi ^3}{24}+\frac {2}{3} i \arctan \left (c x^3\right )^3+\arctan \left (c x^3\right )^2 \log \left (1-e^{-2 i \arctan \left (c x^3\right )}\right )-\arctan \left (c x^3\right )^2 \log \left (1+e^{2 i \arctan \left (c x^3\right )}\right )+i \arctan \left (c x^3\right ) \operatorname {PolyLog}\left (2,e^{-2 i \arctan \left (c x^3\right )}\right )+i \arctan \left (c x^3\right ) \operatorname {PolyLog}\left (2,-e^{2 i \arctan \left (c x^3\right )}\right )+\frac {1}{2} \operatorname {PolyLog}\left (3,e^{-2 i \arctan \left (c x^3\right )}\right )-\frac {1}{2} \operatorname {PolyLog}\left (3,-e^{2 i \arctan \left (c x^3\right )}\right )\right )-\frac {1}{192} i b^3 \left (\pi ^4-32 \arctan \left (c x^3\right )^4+64 i \arctan \left (c x^3\right )^3 \log \left (1-e^{-2 i \arctan \left (c x^3\right )}\right )-64 i \arctan \left (c x^3\right )^3 \log \left (1+e^{2 i \arctan \left (c x^3\right )}\right )-96 \arctan \left (c x^3\right )^2 \operatorname {PolyLog}\left (2,e^{-2 i \arctan \left (c x^3\right )}\right )-96 \arctan \left (c x^3\right )^2 \operatorname {PolyLog}\left (2,-e^{2 i \arctan \left (c x^3\right )}\right )+96 i \arctan \left (c x^3\right ) \operatorname {PolyLog}\left (3,e^{-2 i \arctan \left (c x^3\right )}\right )-96 i \arctan \left (c x^3\right ) \operatorname {PolyLog}\left (3,-e^{2 i \arctan \left (c x^3\right )}\right )+48 \operatorname {PolyLog}\left (4,e^{-2 i \arctan \left (c x^3\right )}\right )+48 \operatorname {PolyLog}\left (4,-e^{2 i \arctan \left (c x^3\right )}\right )\right ) \] Input:

Integrate[(a + b*ArcTan[c*x^3])^3/x,x]
 

Output:

a^3*Log[x] + (I/2)*a^2*b*(PolyLog[2, (-I)*c*x^3] - PolyLog[2, I*c*x^3]) + 
a*b^2*((-1/24*I)*Pi^3 + ((2*I)/3)*ArcTan[c*x^3]^3 + ArcTan[c*x^3]^2*Log[1 
- E^((-2*I)*ArcTan[c*x^3])] - ArcTan[c*x^3]^2*Log[1 + E^((2*I)*ArcTan[c*x^ 
3])] + I*ArcTan[c*x^3]*PolyLog[2, E^((-2*I)*ArcTan[c*x^3])] + I*ArcTan[c*x 
^3]*PolyLog[2, -E^((2*I)*ArcTan[c*x^3])] + PolyLog[3, E^((-2*I)*ArcTan[c*x 
^3])]/2 - PolyLog[3, -E^((2*I)*ArcTan[c*x^3])]/2) - (I/192)*b^3*(Pi^4 - 32 
*ArcTan[c*x^3]^4 + (64*I)*ArcTan[c*x^3]^3*Log[1 - E^((-2*I)*ArcTan[c*x^3]) 
] - (64*I)*ArcTan[c*x^3]^3*Log[1 + E^((2*I)*ArcTan[c*x^3])] - 96*ArcTan[c* 
x^3]^2*PolyLog[2, E^((-2*I)*ArcTan[c*x^3])] - 96*ArcTan[c*x^3]^2*PolyLog[2 
, -E^((2*I)*ArcTan[c*x^3])] + (96*I)*ArcTan[c*x^3]*PolyLog[3, E^((-2*I)*Ar 
cTan[c*x^3])] - (96*I)*ArcTan[c*x^3]*PolyLog[3, -E^((2*I)*ArcTan[c*x^3])] 
+ 48*PolyLog[4, E^((-2*I)*ArcTan[c*x^3])] + 48*PolyLog[4, -E^((2*I)*ArcTan 
[c*x^3])])
 

Rubi [A] (verified)

Time = 1.07 (sec) , antiderivative size = 267, normalized size of antiderivative = 1.15, 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.

\(\displaystyle \int \frac {\left (a+b \arctan \left (c x^3\right )\right )^3}{x} \, dx\)

\(\Big \downarrow \) 5359

\(\displaystyle \frac {1}{3} \int \frac {\left (a+b \arctan \left (c x^3\right )\right )^3}{x^3}dx^3\)

\(\Big \downarrow \) 5357

\(\displaystyle \frac {1}{3} \left (2 \text {arctanh}\left (1-\frac {2}{1+i c x^3}\right ) \left (a+b \arctan \left (c x^3\right )\right )^3-6 b c \int \frac {\left (a+b \arctan \left (c x^3\right )\right )^2 \text {arctanh}\left (1-\frac {2}{i c x^3+1}\right )}{c^2 x^6+1}dx^3\right )\)

\(\Big \downarrow \) 5523

\(\displaystyle \frac {1}{3} \left (2 \text {arctanh}\left (1-\frac {2}{1+i c x^3}\right ) \left (a+b \arctan \left (c x^3\right )\right )^3-6 b c \left (\frac {1}{2} \int \frac {\left (a+b \arctan \left (c x^3\right )\right )^2 \log \left (2-\frac {2}{i c x^3+1}\right )}{c^2 x^6+1}dx^3-\frac {1}{2} \int \frac {\left (a+b \arctan \left (c x^3\right )\right )^2 \log \left (\frac {2}{i c x^3+1}\right )}{c^2 x^6+1}dx^3\right )\right )\)

\(\Big \downarrow \) 5529

\(\displaystyle \frac {1}{3} \left (2 \text {arctanh}\left (1-\frac {2}{1+i c x^3}\right ) \left (a+b \arctan \left (c x^3\right )\right )^3-6 b c \left (\frac {1}{2} \left (\frac {i \operatorname {PolyLog}\left (2,1-\frac {2}{i c x^3+1}\right ) \left (a+b \arctan \left (c x^3\right )\right )^2}{2 c}-i b \int \frac {\left (a+b \arctan \left (c x^3\right )\right ) \operatorname {PolyLog}\left (2,1-\frac {2}{i c x^3+1}\right )}{c^2 x^6+1}dx^3\right )+\frac {1}{2} \left (i b \int \frac {\left (a+b \arctan \left (c x^3\right )\right ) \operatorname {PolyLog}\left (2,\frac {2}{i c x^3+1}-1\right )}{c^2 x^6+1}dx^3-\frac {i \operatorname {PolyLog}\left (2,\frac {2}{i c x^3+1}-1\right ) \left (a+b \arctan \left (c x^3\right )\right )^2}{2 c}\right )\right )\right )\)

\(\Big \downarrow \) 5533

\(\displaystyle \frac {1}{3} \left (2 \text {arctanh}\left (1-\frac {2}{1+i c x^3}\right ) \left (a+b \arctan \left (c x^3\right )\right )^3-6 b c \left (\frac {1}{2} \left (\frac {i \operatorname {PolyLog}\left (2,1-\frac {2}{i c x^3+1}\right ) \left (a+b \arctan \left (c x^3\right )\right )^2}{2 c}-i b \left (\frac {i \operatorname {PolyLog}\left (3,1-\frac {2}{i c x^3+1}\right ) \left (a+b \arctan \left (c x^3\right )\right )}{2 c}-\frac {1}{2} i b \int \frac {\operatorname {PolyLog}\left (3,1-\frac {2}{i c x^3+1}\right )}{c^2 x^6+1}dx^3\right )\right )+\frac {1}{2} \left (i b \left (\frac {i \operatorname {PolyLog}\left (3,\frac {2}{i c x^3+1}-1\right ) \left (a+b \arctan \left (c x^3\right )\right )}{2 c}-\frac {1}{2} i b \int \frac {\operatorname {PolyLog}\left (3,\frac {2}{i c x^3+1}-1\right )}{c^2 x^6+1}dx^3\right )-\frac {i \operatorname {PolyLog}\left (2,\frac {2}{i c x^3+1}-1\right ) \left (a+b \arctan \left (c x^3\right )\right )^2}{2 c}\right )\right )\right )\)

\(\Big \downarrow \) 7164

\(\displaystyle \frac {1}{3} \left (2 \text {arctanh}\left (1-\frac {2}{1+i c x^3}\right ) \left (a+b \arctan \left (c x^3\right )\right )^3-6 b c \left (\frac {1}{2} \left (\frac {i \operatorname {PolyLog}\left (2,1-\frac {2}{i c x^3+1}\right ) \left (a+b \arctan \left (c x^3\right )\right )^2}{2 c}-i b \left (\frac {i \operatorname {PolyLog}\left (3,1-\frac {2}{i c x^3+1}\right ) \left (a+b \arctan \left (c x^3\right )\right )}{2 c}+\frac {b \operatorname {PolyLog}\left (4,1-\frac {2}{i c x^3+1}\right )}{4 c}\right )\right )+\frac {1}{2} \left (i b \left (\frac {i \operatorname {PolyLog}\left (3,\frac {2}{i c x^3+1}-1\right ) \left (a+b \arctan \left (c x^3\right )\right )}{2 c}+\frac {b \operatorname {PolyLog}\left (4,\frac {2}{i c x^3+1}-1\right )}{4 c}\right )-\frac {i \operatorname {PolyLog}\left (2,\frac {2}{i c x^3+1}-1\right ) \left (a+b \arctan \left (c x^3\right )\right )^2}{2 c}\right )\right )\right )\)

Input:

Int[(a + b*ArcTan[c*x^3])^3/x,x]
 

Output:

(2*(a + b*ArcTan[c*x^3])^3*ArcTanh[1 - 2/(1 + I*c*x^3)] - 6*b*c*((((I/2)*( 
a + b*ArcTan[c*x^3])^2*PolyLog[2, 1 - 2/(1 + I*c*x^3)])/c - I*b*(((I/2)*(a 
 + b*ArcTan[c*x^3])*PolyLog[3, 1 - 2/(1 + I*c*x^3)])/c + (b*PolyLog[4, 1 - 
 2/(1 + I*c*x^3)])/(4*c)))/2 + (((-1/2*I)*(a + b*ArcTan[c*x^3])^2*PolyLog[ 
2, -1 + 2/(1 + I*c*x^3)])/c + I*b*(((I/2)*(a + b*ArcTan[c*x^3])*PolyLog[3, 
 -1 + 2/(1 + I*c*x^3)])/c + (b*PolyLog[4, -1 + 2/(1 + I*c*x^3)])/(4*c)))/2 
))/3
 

Defintions of rubi rules used

rule 5357

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]
 

rule 5359

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]
 

rule 5523

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]
 

rule 5529

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]
 

rule 5533

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]
 

rule 7164

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]
 

Maple [F]

\[\int \frac {{\left (a +b \arctan \left (c \,x^{3}\right )\right )}^{3}}{x}d x\]

Input:

int((a+b*arctan(c*x^3))^3/x,x)
 

Output:

int((a+b*arctan(c*x^3))^3/x,x)
 

Fricas [F]

\[ \int \frac {\left (a+b \arctan \left (c x^3\right )\right )^3}{x} \, dx=\int { \frac {{\left (b \arctan \left (c x^{3}\right ) + a\right )}^{3}}{x} \,d x } \] Input:

integrate((a+b*arctan(c*x^3))^3/x,x, algorithm="fricas")
 

Output:

integral((b^3*arctan(c*x^3)^3 + 3*a*b^2*arctan(c*x^3)^2 + 3*a^2*b*arctan(c 
*x^3) + a^3)/x, x)
 

Sympy [F]

\[ \int \frac {\left (a+b \arctan \left (c x^3\right )\right )^3}{x} \, dx=\int \frac {\left (a + b \operatorname {atan}{\left (c x^{3} \right )}\right )^{3}}{x}\, dx \] Input:

integrate((a+b*atan(c*x**3))**3/x,x)
 

Output:

Integral((a + b*atan(c*x**3))**3/x, x)
 

Maxima [F]

\[ \int \frac {\left (a+b \arctan \left (c x^3\right )\right )^3}{x} \, dx=\int { \frac {{\left (b \arctan \left (c x^{3}\right ) + a\right )}^{3}}{x} \,d x } \] Input:

integrate((a+b*arctan(c*x^3))^3/x,x, algorithm="maxima")
 

Output:

a^3*log(x) + 1/32*integrate((28*b^3*arctan(c*x^3)^3 + 3*b^3*arctan(c*x^3)* 
log(c^2*x^6 + 1)^2 + 96*a*b^2*arctan(c*x^3)^2 + 96*a^2*b*arctan(c*x^3))/x, 
 x)
 

Giac [F]

\[ \int \frac {\left (a+b \arctan \left (c x^3\right )\right )^3}{x} \, dx=\int { \frac {{\left (b \arctan \left (c x^{3}\right ) + a\right )}^{3}}{x} \,d x } \] Input:

integrate((a+b*arctan(c*x^3))^3/x,x, algorithm="giac")
 

Output:

integrate((b*arctan(c*x^3) + a)^3/x, x)
 

Mupad [F(-1)]

Timed out. \[ \int \frac {\left (a+b \arctan \left (c x^3\right )\right )^3}{x} \, dx=\int \frac {{\left (a+b\,\mathrm {atan}\left (c\,x^3\right )\right )}^3}{x} \,d x \] Input:

int((a + b*atan(c*x^3))^3/x,x)
 

Output:

int((a + b*atan(c*x^3))^3/x, x)
 

Reduce [F]

\[ \int \frac {\left (a+b \arctan \left (c x^3\right )\right )^3}{x} \, dx=3 \left (\int \frac {\mathit {atan} \left (c \,x^{3}\right )}{x}d x \right ) a^{2} b +\left (\int \frac {\mathit {atan} \left (c \,x^{3}\right )^{3}}{x}d x \right ) b^{3}+3 \left (\int \frac {\mathit {atan} \left (c \,x^{3}\right )^{2}}{x}d x \right ) a \,b^{2}+\mathrm {log}\left (x \right ) a^{3} \] Input:

int((a+b*atan(c*x^3))^3/x,x)
                                                                                    
                                                                                    
 

Output:

3*int(atan(c*x**3)/x,x)*a**2*b + int(atan(c*x**3)**3/x,x)*b**3 + 3*int(ata 
n(c*x**3)**2/x,x)*a*b**2 + log(x)*a**3