3.1.35 \(\int x^2 \arccos (a x)^4 \, dx\) [35]

3.1.35.1 Optimal result

Integrand size = 10, antiderivative size = 166 \[ \int x^2 \arccos (a x)^4 \, dx=\frac {160 x}{27 a^2}+\frac {8 x^3}{81}+\frac {160 \sqrt {1-a^2 x^2} \arccos (a x)}{27 a^3}+\frac {8 x^2 \sqrt {1-a^2 x^2} \arccos (a x)}{27 a}-\frac {8 x \arccos (a x)^2}{3 a^2}-\frac {4}{9} x^3 \arccos (a x)^2-\frac {8 \sqrt {1-a^2 x^2} \arccos (a x)^3}{9 a^3}-\frac {4 x^2 \sqrt {1-a^2 x^2} \arccos (a x)^3}{9 a}+\frac {1}{3} x^3 \arccos (a x)^4 \]

output

160/27*x/a^2+8/81*x^3-8/3*x*arccos(a*x)^2/a^2-4/9*x^3*arccos(a*x)^2+1/3*x^ 
3*arccos(a*x)^4+160/27*arccos(a*x)*(-a^2*x^2+1)^(1/2)/a^3+8/27*x^2*arccos( 
a*x)*(-a^2*x^2+1)^(1/2)/a-8/9*arccos(a*x)^3*(-a^2*x^2+1)^(1/2)/a^3-4/9*x^2 
*arccos(a*x)^3*(-a^2*x^2+1)^(1/2)/a
 

3.1.35.2 Mathematica [A] (verified)

Time = 0.06 (sec) , antiderivative size = 114, normalized size of antiderivative = 0.69 \[ \int x^2 \arccos (a x)^4 \, dx=\frac {8 a x \left (60+a^2 x^2\right )+24 \sqrt {1-a^2 x^2} \left (20+a^2 x^2\right ) \arccos (a x)-36 a x \left (6+a^2 x^2\right ) \arccos (a x)^2-36 \sqrt {1-a^2 x^2} \left (2+a^2 x^2\right ) \arccos (a x)^3+27 a^3 x^3 \arccos (a x)^4}{81 a^3} \]

input

Integrate[x^2*ArcCos[a*x]^4,x]
 

output

(8*a*x*(60 + a^2*x^2) + 24*Sqrt[1 - a^2*x^2]*(20 + a^2*x^2)*ArcCos[a*x] - 
36*a*x*(6 + a^2*x^2)*ArcCos[a*x]^2 - 36*Sqrt[1 - a^2*x^2]*(2 + a^2*x^2)*Ar 
cCos[a*x]^3 + 27*a^3*x^3*ArcCos[a*x]^4)/(81*a^3)
 

3.1.35.3 Rubi [A] (verified)

Time = 1.18 (sec) , antiderivative size = 230, normalized size of antiderivative = 1.39, number of steps used = 11, number of rules used = 11, \(\frac {\text {number of rules}}{\text {integrand size}}\) = 1.100, Rules used = {5139, 5211, 5139, 5183, 5131, 5183, 24, 5211, 15, 5183, 24}

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.

\(\displaystyle \int x^2 \arccos (a x)^4 \, dx\)

\(\Big \downarrow \) 5139

\(\displaystyle \frac {4}{3} a \int \frac {x^3 \arccos (a x)^3}{\sqrt {1-a^2 x^2}}dx+\frac {1}{3} x^3 \arccos (a x)^4\)

\(\Big \downarrow \) 5211

\(\displaystyle \frac {4}{3} a \left (\frac {2 \int \frac {x \arccos (a x)^3}{\sqrt {1-a^2 x^2}}dx}{3 a^2}-\frac {\int x^2 \arccos (a x)^2dx}{a}-\frac {x^2 \sqrt {1-a^2 x^2} \arccos (a x)^3}{3 a^2}\right )+\frac {1}{3} x^3 \arccos (a x)^4\)

\(\Big \downarrow \) 5139

\(\displaystyle \frac {4}{3} a \left (\frac {2 \int \frac {x \arccos (a x)^3}{\sqrt {1-a^2 x^2}}dx}{3 a^2}-\frac {\frac {2}{3} a \int \frac {x^3 \arccos (a x)}{\sqrt {1-a^2 x^2}}dx+\frac {1}{3} x^3 \arccos (a x)^2}{a}-\frac {x^2 \sqrt {1-a^2 x^2} \arccos (a x)^3}{3 a^2}\right )+\frac {1}{3} x^3 \arccos (a x)^4\)

\(\Big \downarrow \) 5183

\(\displaystyle \frac {4}{3} a \left (\frac {2 \left (-\frac {3 \int \arccos (a x)^2dx}{a}-\frac {\sqrt {1-a^2 x^2} \arccos (a x)^3}{a^2}\right )}{3 a^2}-\frac {\frac {2}{3} a \int \frac {x^3 \arccos (a x)}{\sqrt {1-a^2 x^2}}dx+\frac {1}{3} x^3 \arccos (a x)^2}{a}-\frac {x^2 \sqrt {1-a^2 x^2} \arccos (a x)^3}{3 a^2}\right )+\frac {1}{3} x^3 \arccos (a x)^4\)

\(\Big \downarrow \) 5131

\(\displaystyle \frac {4}{3} a \left (\frac {2 \left (-\frac {3 \left (2 a \int \frac {x \arccos (a x)}{\sqrt {1-a^2 x^2}}dx+x \arccos (a x)^2\right )}{a}-\frac {\sqrt {1-a^2 x^2} \arccos (a x)^3}{a^2}\right )}{3 a^2}-\frac {\frac {2}{3} a \int \frac {x^3 \arccos (a x)}{\sqrt {1-a^2 x^2}}dx+\frac {1}{3} x^3 \arccos (a x)^2}{a}-\frac {x^2 \sqrt {1-a^2 x^2} \arccos (a x)^3}{3 a^2}\right )+\frac {1}{3} x^3 \arccos (a x)^4\)

\(\Big \downarrow \) 5183

\(\displaystyle \frac {4}{3} a \left (\frac {2 \left (-\frac {3 \left (2 a \left (-\frac {\int 1dx}{a}-\frac {\sqrt {1-a^2 x^2} \arccos (a x)}{a^2}\right )+x \arccos (a x)^2\right )}{a}-\frac {\sqrt {1-a^2 x^2} \arccos (a x)^3}{a^2}\right )}{3 a^2}-\frac {\frac {2}{3} a \int \frac {x^3 \arccos (a x)}{\sqrt {1-a^2 x^2}}dx+\frac {1}{3} x^3 \arccos (a x)^2}{a}-\frac {x^2 \sqrt {1-a^2 x^2} \arccos (a x)^3}{3 a^2}\right )+\frac {1}{3} x^3 \arccos (a x)^4\)

\(\Big \downarrow \) 24

\(\displaystyle \frac {4}{3} a \left (-\frac {\frac {2}{3} a \int \frac {x^3 \arccos (a x)}{\sqrt {1-a^2 x^2}}dx+\frac {1}{3} x^3 \arccos (a x)^2}{a}-\frac {x^2 \sqrt {1-a^2 x^2} \arccos (a x)^3}{3 a^2}+\frac {2 \left (-\frac {\sqrt {1-a^2 x^2} \arccos (a x)^3}{a^2}-\frac {3 \left (2 a \left (-\frac {\sqrt {1-a^2 x^2} \arccos (a x)}{a^2}-\frac {x}{a}\right )+x \arccos (a x)^2\right )}{a}\right )}{3 a^2}\right )+\frac {1}{3} x^3 \arccos (a x)^4\)

\(\Big \downarrow \) 5211

\(\displaystyle \frac {4}{3} a \left (-\frac {\frac {2}{3} a \left (\frac {2 \int \frac {x \arccos (a x)}{\sqrt {1-a^2 x^2}}dx}{3 a^2}-\frac {\int x^2dx}{3 a}-\frac {x^2 \sqrt {1-a^2 x^2} \arccos (a x)}{3 a^2}\right )+\frac {1}{3} x^3 \arccos (a x)^2}{a}-\frac {x^2 \sqrt {1-a^2 x^2} \arccos (a x)^3}{3 a^2}+\frac {2 \left (-\frac {\sqrt {1-a^2 x^2} \arccos (a x)^3}{a^2}-\frac {3 \left (2 a \left (-\frac {\sqrt {1-a^2 x^2} \arccos (a x)}{a^2}-\frac {x}{a}\right )+x \arccos (a x)^2\right )}{a}\right )}{3 a^2}\right )+\frac {1}{3} x^3 \arccos (a x)^4\)

\(\Big \downarrow \) 15

\(\displaystyle \frac {4}{3} a \left (-\frac {\frac {2}{3} a \left (\frac {2 \int \frac {x \arccos (a x)}{\sqrt {1-a^2 x^2}}dx}{3 a^2}-\frac {x^2 \sqrt {1-a^2 x^2} \arccos (a x)}{3 a^2}-\frac {x^3}{9 a}\right )+\frac {1}{3} x^3 \arccos (a x)^2}{a}-\frac {x^2 \sqrt {1-a^2 x^2} \arccos (a x)^3}{3 a^2}+\frac {2 \left (-\frac {\sqrt {1-a^2 x^2} \arccos (a x)^3}{a^2}-\frac {3 \left (2 a \left (-\frac {\sqrt {1-a^2 x^2} \arccos (a x)}{a^2}-\frac {x}{a}\right )+x \arccos (a x)^2\right )}{a}\right )}{3 a^2}\right )+\frac {1}{3} x^3 \arccos (a x)^4\)

\(\Big \downarrow \) 5183

\(\displaystyle \frac {4}{3} a \left (-\frac {\frac {2}{3} a \left (\frac {2 \left (-\frac {\int 1dx}{a}-\frac {\sqrt {1-a^2 x^2} \arccos (a x)}{a^2}\right )}{3 a^2}-\frac {x^2 \sqrt {1-a^2 x^2} \arccos (a x)}{3 a^2}-\frac {x^3}{9 a}\right )+\frac {1}{3} x^3 \arccos (a x)^2}{a}-\frac {x^2 \sqrt {1-a^2 x^2} \arccos (a x)^3}{3 a^2}+\frac {2 \left (-\frac {\sqrt {1-a^2 x^2} \arccos (a x)^3}{a^2}-\frac {3 \left (2 a \left (-\frac {\sqrt {1-a^2 x^2} \arccos (a x)}{a^2}-\frac {x}{a}\right )+x \arccos (a x)^2\right )}{a}\right )}{3 a^2}\right )+\frac {1}{3} x^3 \arccos (a x)^4\)

\(\Big \downarrow \) 24

\(\displaystyle \frac {4}{3} a \left (-\frac {x^2 \sqrt {1-a^2 x^2} \arccos (a x)^3}{3 a^2}+\frac {2 \left (-\frac {\sqrt {1-a^2 x^2} \arccos (a x)^3}{a^2}-\frac {3 \left (2 a \left (-\frac {\sqrt {1-a^2 x^2} \arccos (a x)}{a^2}-\frac {x}{a}\right )+x \arccos (a x)^2\right )}{a}\right )}{3 a^2}-\frac {\frac {2}{3} a \left (-\frac {x^2 \sqrt {1-a^2 x^2} \arccos (a x)}{3 a^2}+\frac {2 \left (-\frac {\sqrt {1-a^2 x^2} \arccos (a x)}{a^2}-\frac {x}{a}\right )}{3 a^2}-\frac {x^3}{9 a}\right )+\frac {1}{3} x^3 \arccos (a x)^2}{a}\right )+\frac {1}{3} x^3 \arccos (a x)^4\)

input

Int[x^2*ArcCos[a*x]^4,x]
 

output

(x^3*ArcCos[a*x]^4)/3 + (4*a*(-1/3*(x^2*Sqrt[1 - a^2*x^2]*ArcCos[a*x]^3)/a 
^2 - ((x^3*ArcCos[a*x]^2)/3 + (2*a*(-1/9*x^3/a - (x^2*Sqrt[1 - a^2*x^2]*Ar 
cCos[a*x])/(3*a^2) + (2*(-(x/a) - (Sqrt[1 - a^2*x^2]*ArcCos[a*x])/a^2))/(3 
*a^2)))/3)/a + (2*(-((Sqrt[1 - a^2*x^2]*ArcCos[a*x]^3)/a^2) - (3*(x*ArcCos 
[a*x]^2 + 2*a*(-(x/a) - (Sqrt[1 - a^2*x^2]*ArcCos[a*x])/a^2)))/a))/(3*a^2) 
))/3
 

3.1.35.3.1 Defintions of rubi rules used

rule 15

Int[(a_.)*(x_)^(m_.), x_Symbol] :> Simp[a*(x^(m + 1)/(m + 1)), x] /; FreeQ[ 
{a, m}, x] && NeQ[m, -1]
 

rule 24

Int[a_, x_Symbol] :> Simp[a*x, x] /; FreeQ[a, x]
 

rule 5131

Int[((a_.) + ArcCos[(c_.)*(x_)]*(b_.))^(n_.), x_Symbol] :> Simp[x*(a + b*Ar 
cCos[c*x])^n, x] + Simp[b*c*n   Int[x*((a + b*ArcCos[c*x])^(n - 1)/Sqrt[1 - 
 c^2*x^2]), x], x] /; FreeQ[{a, b, c}, x] && GtQ[n, 0]
 

rule 5139

Int[((a_.) + ArcCos[(c_.)*(x_)]*(b_.))^(n_.)*((d_.)*(x_))^(m_.), x_Symbol] 
:> Simp[(d*x)^(m + 1)*((a + b*ArcCos[c*x])^n/(d*(m + 1))), x] + Simp[b*c*(n 
/(d*(m + 1)))   Int[(d*x)^(m + 1)*((a + b*ArcCos[c*x])^(n - 1)/Sqrt[1 - c^2 
*x^2]), x], x] /; FreeQ[{a, b, c, d, m}, x] && IGtQ[n, 0] && NeQ[m, -1]
 

rule 5183

Int[((a_.) + ArcCos[(c_.)*(x_)]*(b_.))^(n_.)*(x_)*((d_) + (e_.)*(x_)^2)^(p_ 
.), x_Symbol] :> Simp[(d + e*x^2)^(p + 1)*((a + b*ArcCos[c*x])^n/(2*e*(p + 
1))), x] - Simp[b*(n/(2*c*(p + 1)))*Simp[(d + e*x^2)^p/(1 - c^2*x^2)^p]   I 
nt[(1 - c^2*x^2)^(p + 1/2)*(a + b*ArcCos[c*x])^(n - 1), x], x] /; FreeQ[{a, 
 b, c, d, e, p}, x] && EqQ[c^2*d + e, 0] && GtQ[n, 0] && NeQ[p, -1]
 

rule 5211

Int[((a_.) + ArcCos[(c_.)*(x_)]*(b_.))^(n_.)*((f_.)*(x_))^(m_)*((d_) + (e_. 
)*(x_)^2)^(p_), x_Symbol] :> Simp[f*(f*x)^(m - 1)*(d + e*x^2)^(p + 1)*((a + 
 b*ArcCos[c*x])^n/(e*(m + 2*p + 1))), x] + (Simp[f^2*((m - 1)/(c^2*(m + 2*p 
 + 1)))   Int[(f*x)^(m - 2)*(d + e*x^2)^p*(a + b*ArcCos[c*x])^n, x], x] - S 
imp[b*f*(n/(c*(m + 2*p + 1)))*Simp[(d + e*x^2)^p/(1 - c^2*x^2)^p]   Int[(f* 
x)^(m - 1)*(1 - c^2*x^2)^(p + 1/2)*(a + b*ArcCos[c*x])^(n - 1), x], x]) /; 
FreeQ[{a, b, c, d, e, f, p}, x] && EqQ[c^2*d + e, 0] && GtQ[n, 0] && IGtQ[m 
, 1] && NeQ[m + 2*p + 1, 0]
 

3.1.35.4 Maple [A] (verified)

Time = 1.22 (sec) , antiderivative size = 130, normalized size of antiderivative = 0.78

method	result	size
derivativedivides	\(\frac {\frac {a^{3} x^{3} \arccos \left (a x \right )^{4}}{3}-\frac {4 \arccos \left (a x \right )^{3} \left (a^{2} x^{2}+2\right ) \sqrt {-a^{2} x^{2}+1}}{9}-\frac {8 \arccos \left (a x \right )^{2} a x}{3}+\frac {160 a x}{27}+\frac {16 \arccos \left (a x \right ) \sqrt {-a^{2} x^{2}+1}}{3}-\frac {4 \arccos \left (a x \right )^{2} a^{3} x^{3}}{9}+\frac {8 \arccos \left (a x \right ) \left (a^{2} x^{2}+2\right ) \sqrt {-a^{2} x^{2}+1}}{27}+\frac {8 a^{3} x^{3}}{81}}{a^{3}}\)	\(130\)
default	\(\frac {\frac {a^{3} x^{3} \arccos \left (a x \right )^{4}}{3}-\frac {4 \arccos \left (a x \right )^{3} \left (a^{2} x^{2}+2\right ) \sqrt {-a^{2} x^{2}+1}}{9}-\frac {8 \arccos \left (a x \right )^{2} a x}{3}+\frac {160 a x}{27}+\frac {16 \arccos \left (a x \right ) \sqrt {-a^{2} x^{2}+1}}{3}-\frac {4 \arccos \left (a x \right )^{2} a^{3} x^{3}}{9}+\frac {8 \arccos \left (a x \right ) \left (a^{2} x^{2}+2\right ) \sqrt {-a^{2} x^{2}+1}}{27}+\frac {8 a^{3} x^{3}}{81}}{a^{3}}\)	\(130\)

input

int(x^2*arccos(a*x)^4,x,method=_RETURNVERBOSE)
 

output

1/a^3*(1/3*a^3*x^3*arccos(a*x)^4-4/9*arccos(a*x)^3*(a^2*x^2+2)*(-a^2*x^2+1 
)^(1/2)-8/3*arccos(a*x)^2*a*x+160/27*a*x+16/3*arccos(a*x)*(-a^2*x^2+1)^(1/ 
2)-4/9*arccos(a*x)^2*a^3*x^3+8/27*arccos(a*x)*(a^2*x^2+2)*(-a^2*x^2+1)^(1/ 
2)+8/81*a^3*x^3)
 

3.1.35.5 Fricas [A] (verification not implemented)

Time = 0.26 (sec) , antiderivative size = 99, normalized size of antiderivative = 0.60 \[ \int x^2 \arccos (a x)^4 \, dx=\frac {27 \, a^{3} x^{3} \arccos \left (a x\right )^{4} + 8 \, a^{3} x^{3} - 36 \, {\left (a^{3} x^{3} + 6 \, a x\right )} \arccos \left (a x\right )^{2} + 480 \, a x - 12 \, \sqrt {-a^{2} x^{2} + 1} {\left (3 \, {\left (a^{2} x^{2} + 2\right )} \arccos \left (a x\right )^{3} - 2 \, {\left (a^{2} x^{2} + 20\right )} \arccos \left (a x\right )\right )}}{81 \, a^{3}} \]

input

integrate(x^2*arccos(a*x)^4,x, algorithm="fricas")
 

output

1/81*(27*a^3*x^3*arccos(a*x)^4 + 8*a^3*x^3 - 36*(a^3*x^3 + 6*a*x)*arccos(a 
*x)^2 + 480*a*x - 12*sqrt(-a^2*x^2 + 1)*(3*(a^2*x^2 + 2)*arccos(a*x)^3 - 2 
*(a^2*x^2 + 20)*arccos(a*x)))/a^3
 

3.1.35.6 Sympy [A] (verification not implemented)

Time = 0.47 (sec) , antiderivative size = 165, normalized size of antiderivative = 0.99 \[ \int x^2 \arccos (a x)^4 \, dx=\begin {cases} \frac {x^{3} \operatorname {acos}^{4}{\left (a x \right )}}{3} - \frac {4 x^{3} \operatorname {acos}^{2}{\left (a x \right )}}{9} + \frac {8 x^{3}}{81} - \frac {4 x^{2} \sqrt {- a^{2} x^{2} + 1} \operatorname {acos}^{3}{\left (a x \right )}}{9 a} + \frac {8 x^{2} \sqrt {- a^{2} x^{2} + 1} \operatorname {acos}{\left (a x \right )}}{27 a} - \frac {8 x \operatorname {acos}^{2}{\left (a x \right )}}{3 a^{2}} + \frac {160 x}{27 a^{2}} - \frac {8 \sqrt {- a^{2} x^{2} + 1} \operatorname {acos}^{3}{\left (a x \right )}}{9 a^{3}} + \frac {160 \sqrt {- a^{2} x^{2} + 1} \operatorname {acos}{\left (a x \right )}}{27 a^{3}} & \text {for}\: a \neq 0 \\\frac {\pi ^{4} x^{3}}{48} & \text {otherwise} \end {cases} \]

input

integrate(x**2*acos(a*x)**4,x)
 

output

Piecewise((x**3*acos(a*x)**4/3 - 4*x**3*acos(a*x)**2/9 + 8*x**3/81 - 4*x** 
2*sqrt(-a**2*x**2 + 1)*acos(a*x)**3/(9*a) + 8*x**2*sqrt(-a**2*x**2 + 1)*ac 
os(a*x)/(27*a) - 8*x*acos(a*x)**2/(3*a**2) + 160*x/(27*a**2) - 8*sqrt(-a** 
2*x**2 + 1)*acos(a*x)**3/(9*a**3) + 160*sqrt(-a**2*x**2 + 1)*acos(a*x)/(27 
*a**3), Ne(a, 0)), (pi**4*x**3/48, True))
 

3.1.35.7 Maxima [A] (verification not implemented)

Time = 0.29 (sec) , antiderivative size = 146, normalized size of antiderivative = 0.88 \[ \int x^2 \arccos (a x)^4 \, dx=\frac {1}{3} \, x^{3} \arccos \left (a x\right )^{4} - \frac {4}{9} \, a {\left (\frac {\sqrt {-a^{2} x^{2} + 1} x^{2}}{a^{2}} + \frac {2 \, \sqrt {-a^{2} x^{2} + 1}}{a^{4}}\right )} \arccos \left (a x\right )^{3} + \frac {4}{81} \, {\left (2 \, a {\left (\frac {3 \, {\left (\sqrt {-a^{2} x^{2} + 1} x^{2} + \frac {20 \, \sqrt {-a^{2} x^{2} + 1}}{a^{2}}\right )} \arccos \left (a x\right )}{a^{3}} + \frac {a^{2} x^{3} + 60 \, x}{a^{4}}\right )} - \frac {9 \, {\left (a^{2} x^{3} + 6 \, x\right )} \arccos \left (a x\right )^{2}}{a^{3}}\right )} a \]

input

integrate(x^2*arccos(a*x)^4,x, algorithm="maxima")
 

output

1/3*x^3*arccos(a*x)^4 - 4/9*a*(sqrt(-a^2*x^2 + 1)*x^2/a^2 + 2*sqrt(-a^2*x^ 
2 + 1)/a^4)*arccos(a*x)^3 + 4/81*(2*a*(3*(sqrt(-a^2*x^2 + 1)*x^2 + 20*sqrt 
(-a^2*x^2 + 1)/a^2)*arccos(a*x)/a^3 + (a^2*x^3 + 60*x)/a^4) - 9*(a^2*x^3 + 
 6*x)*arccos(a*x)^2/a^3)*a
 

3.1.35.8 Giac [A] (verification not implemented)

Time = 0.28 (sec) , antiderivative size = 140, normalized size of antiderivative = 0.84 \[ \int x^2 \arccos (a x)^4 \, dx=\frac {1}{3} \, x^{3} \arccos \left (a x\right )^{4} - \frac {4}{9} \, x^{3} \arccos \left (a x\right )^{2} - \frac {4 \, \sqrt {-a^{2} x^{2} + 1} x^{2} \arccos \left (a x\right )^{3}}{9 \, a} + \frac {8}{81} \, x^{3} + \frac {8 \, \sqrt {-a^{2} x^{2} + 1} x^{2} \arccos \left (a x\right )}{27 \, a} - \frac {8 \, x \arccos \left (a x\right )^{2}}{3 \, a^{2}} - \frac {8 \, \sqrt {-a^{2} x^{2} + 1} \arccos \left (a x\right )^{3}}{9 \, a^{3}} + \frac {160 \, x}{27 \, a^{2}} + \frac {160 \, \sqrt {-a^{2} x^{2} + 1} \arccos \left (a x\right )}{27 \, a^{3}} \]

input

integrate(x^2*arccos(a*x)^4,x, algorithm="giac")
 

output

1/3*x^3*arccos(a*x)^4 - 4/9*x^3*arccos(a*x)^2 - 4/9*sqrt(-a^2*x^2 + 1)*x^2 
*arccos(a*x)^3/a + 8/81*x^3 + 8/27*sqrt(-a^2*x^2 + 1)*x^2*arccos(a*x)/a - 
8/3*x*arccos(a*x)^2/a^2 - 8/9*sqrt(-a^2*x^2 + 1)*arccos(a*x)^3/a^3 + 160/2 
7*x/a^2 + 160/27*sqrt(-a^2*x^2 + 1)*arccos(a*x)/a^3
 

3.1.35.9 Mupad [F(-1)]

Timed out. \[ \int x^2 \arccos (a x)^4 \, dx=\int x^2\,{\mathrm {acos}\left (a\,x\right )}^4 \,d x \]

input

int(x^2*acos(a*x)^4,x)
 

output

int(x^2*acos(a*x)^4, x)