Integrand size = 24, antiderivative size = 67 \[ \int \frac {x^2}{\left (c+a^2 c x^2\right )^3 \arctan (a x)^{3/2}} \, dx=-\frac {2 x^2}{a c^3 \left (1+a^2 x^2\right )^2 \sqrt {\arctan (a x)}}+\frac {\sqrt {\frac {\pi }{2}} \operatorname {FresnelS}\left (2 \sqrt {\frac {2}{\pi }} \sqrt {\arctan (a x)}\right )}{a^3 c^3} \] Output:
-2*x^2/a/c^3/(a^2*x^2+1)^2/arctan(a*x)^(1/2)+1/2*2^(1/2)*Pi^(1/2)*FresnelS (2*2^(1/2)/Pi^(1/2)*arctan(a*x)^(1/2))/a^3/c^3
Result contains complex when optimal does not.
Time = 0.35 (sec) , antiderivative size = 112, normalized size of antiderivative = 1.67 \[ \int \frac {x^2}{\left (c+a^2 c x^2\right )^3 \arctan (a x)^{3/2}} \, dx=\frac {-8 a^2 x^2-\left (1+a^2 x^2\right )^2 \sqrt {-i \arctan (a x)} \Gamma \left (\frac {1}{2},-4 i \arctan (a x)\right )-\left (1+a^2 x^2\right )^2 \sqrt {i \arctan (a x)} \Gamma \left (\frac {1}{2},4 i \arctan (a x)\right )}{4 a^3 c^3 \left (1+a^2 x^2\right )^2 \sqrt {\arctan (a x)}} \] Input:
Integrate[x^2/((c + a^2*c*x^2)^3*ArcTan[a*x]^(3/2)),x]
Output:
(-8*a^2*x^2 - (1 + a^2*x^2)^2*Sqrt[(-I)*ArcTan[a*x]]*Gamma[1/2, (-4*I)*Arc Tan[a*x]] - (1 + a^2*x^2)^2*Sqrt[I*ArcTan[a*x]]*Gamma[1/2, (4*I)*ArcTan[a* x]])/(4*a^3*c^3*(1 + a^2*x^2)^2*Sqrt[ArcTan[a*x]])
Leaf count is larger than twice the leaf count of optimal. \(165\) vs. \(2(67)=134\).
Time = 0.64 (sec) , antiderivative size = 165, normalized size of antiderivative = 2.46, number of steps used = 6, number of rules used = 5, \(\frac {\text {number of rules}}{\text {integrand size}}\) = 0.208, Rules used = {5503, 27, 5505, 4906, 2009}
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.
\(\displaystyle \int \frac {x^2}{\arctan (a x)^{3/2} \left (a^2 c x^2+c\right )^3} \, dx\) |
\(\Big \downarrow \) 5503 |
\(\displaystyle \frac {4 \int \frac {x}{c^3 \left (a^2 x^2+1\right )^3 \sqrt {\arctan (a x)}}dx}{a}-4 a \int \frac {x^3}{c^3 \left (a^2 x^2+1\right )^3 \sqrt {\arctan (a x)}}dx-\frac {2 x^2}{a c^3 \left (a^2 x^2+1\right )^2 \sqrt {\arctan (a x)}}\) |
\(\Big \downarrow \) 27 |
\(\displaystyle \frac {4 \int \frac {x}{\left (a^2 x^2+1\right )^3 \sqrt {\arctan (a x)}}dx}{a c^3}-\frac {4 a \int \frac {x^3}{\left (a^2 x^2+1\right )^3 \sqrt {\arctan (a x)}}dx}{c^3}-\frac {2 x^2}{a c^3 \left (a^2 x^2+1\right )^2 \sqrt {\arctan (a x)}}\) |
\(\Big \downarrow \) 5505 |
\(\displaystyle \frac {4 \int \frac {a x}{\left (a^2 x^2+1\right )^2 \sqrt {\arctan (a x)}}d\arctan (a x)}{a^3 c^3}-\frac {4 \int \frac {a^3 x^3}{\left (a^2 x^2+1\right )^2 \sqrt {\arctan (a x)}}d\arctan (a x)}{a^3 c^3}-\frac {2 x^2}{a c^3 \left (a^2 x^2+1\right )^2 \sqrt {\arctan (a x)}}\) |
\(\Big \downarrow \) 4906 |
\(\displaystyle -\frac {4 \int \left (\frac {\sin (2 \arctan (a x))}{4 \sqrt {\arctan (a x)}}-\frac {\sin (4 \arctan (a x))}{8 \sqrt {\arctan (a x)}}\right )d\arctan (a x)}{a^3 c^3}+\frac {4 \int \left (\frac {\sin (2 \arctan (a x))}{4 \sqrt {\arctan (a x)}}+\frac {\sin (4 \arctan (a x))}{8 \sqrt {\arctan (a x)}}\right )d\arctan (a x)}{a^3 c^3}-\frac {2 x^2}{a c^3 \left (a^2 x^2+1\right )^2 \sqrt {\arctan (a x)}}\) |
\(\Big \downarrow \) 2009 |
\(\displaystyle -\frac {4 \left (\frac {1}{4} \sqrt {\pi } \operatorname {FresnelS}\left (\frac {2 \sqrt {\arctan (a x)}}{\sqrt {\pi }}\right )-\frac {1}{8} \sqrt {\frac {\pi }{2}} \operatorname {FresnelS}\left (2 \sqrt {\frac {2}{\pi }} \sqrt {\arctan (a x)}\right )\right )}{a^3 c^3}+\frac {4 \left (\frac {1}{8} \sqrt {\frac {\pi }{2}} \operatorname {FresnelS}\left (2 \sqrt {\frac {2}{\pi }} \sqrt {\arctan (a x)}\right )+\frac {1}{4} \sqrt {\pi } \operatorname {FresnelS}\left (\frac {2 \sqrt {\arctan (a x)}}{\sqrt {\pi }}\right )\right )}{a^3 c^3}-\frac {2 x^2}{a c^3 \left (a^2 x^2+1\right )^2 \sqrt {\arctan (a x)}}\) |
Input:
Int[x^2/((c + a^2*c*x^2)^3*ArcTan[a*x]^(3/2)),x]
Output:
(-2*x^2)/(a*c^3*(1 + a^2*x^2)^2*Sqrt[ArcTan[a*x]]) - (4*(-1/8*(Sqrt[Pi/2]* FresnelS[2*Sqrt[2/Pi]*Sqrt[ArcTan[a*x]]]) + (Sqrt[Pi]*FresnelS[(2*Sqrt[Arc Tan[a*x]])/Sqrt[Pi]])/4))/(a^3*c^3) + (4*((Sqrt[Pi/2]*FresnelS[2*Sqrt[2/Pi ]*Sqrt[ArcTan[a*x]]])/8 + (Sqrt[Pi]*FresnelS[(2*Sqrt[ArcTan[a*x]])/Sqrt[Pi ]])/4))/(a^3*c^3)
Int[(a_)*(Fx_), x_Symbol] :> Simp[a Int[Fx, x], x] /; FreeQ[a, x] && !Ma tchQ[Fx, (b_)*(Gx_) /; FreeQ[b, x]]
Int[Cos[(a_.) + (b_.)*(x_)]^(p_.)*((c_.) + (d_.)*(x_))^(m_.)*Sin[(a_.) + (b _.)*(x_)]^(n_.), x_Symbol] :> Int[ExpandTrigReduce[(c + d*x)^m, Sin[a + b*x ]^n*Cos[a + b*x]^p, x], x] /; FreeQ[{a, b, c, d, m}, x] && IGtQ[n, 0] && IG tQ[p, 0]
Int[((a_.) + ArcTan[(c_.)*(x_)]*(b_.))^(p_.)*(x_)^(m_.)*((d_) + (e_.)*(x_)^ 2)^(q_), x_Symbol] :> Simp[x^m*(d + e*x^2)^(q + 1)*((a + b*ArcTan[c*x])^(p + 1)/(b*c*d*(p + 1))), x] + (-Simp[c*((m + 2*q + 2)/(b*(p + 1))) Int[x^(m + 1)*(d + e*x^2)^q*(a + b*ArcTan[c*x])^(p + 1), x], x] - Simp[m/(b*c*(p + 1)) Int[x^(m - 1)*(d + e*x^2)^q*(a + b*ArcTan[c*x])^(p + 1), x], x]) /; F reeQ[{a, b, c, d, e, m}, x] && EqQ[e, c^2*d] && IntegerQ[m] && LtQ[q, -1] & & LtQ[p, -1] && NeQ[m + 2*q + 2, 0]
Int[((a_.) + ArcTan[(c_.)*(x_)]*(b_.))^(p_.)*(x_)^(m_.)*((d_) + (e_.)*(x_)^ 2)^(q_), x_Symbol] :> Simp[d^q/c^(m + 1) Subst[Int[(a + b*x)^p*(Sin[x]^m/ Cos[x]^(m + 2*(q + 1))), x], x, ArcTan[c*x]], x] /; FreeQ[{a, b, c, d, e, p }, x] && EqQ[e, c^2*d] && IGtQ[m, 0] && ILtQ[m + 2*q + 1, 0] && (IntegerQ[q ] || GtQ[d, 0])
Time = 0.19 (sec) , antiderivative size = 53, normalized size of antiderivative = 0.79
method | result | size |
default | \(\frac {2 \sqrt {2}\, \sqrt {\arctan \left (a x \right )}\, \sqrt {\pi }\, \operatorname {FresnelS}\left (\frac {2 \sqrt {2}\, \sqrt {\arctan \left (a x \right )}}{\sqrt {\pi }}\right )+\cos \left (4 \arctan \left (a x \right )\right )-1}{4 a^{3} c^{3} \sqrt {\arctan \left (a x \right )}}\) | \(53\) |
Input:
int(x^2/(a^2*c*x^2+c)^3/arctan(a*x)^(3/2),x,method=_RETURNVERBOSE)
Output:
1/4/a^3/c^3*(2*2^(1/2)*arctan(a*x)^(1/2)*Pi^(1/2)*FresnelS(2*2^(1/2)/Pi^(1 /2)*arctan(a*x)^(1/2))+cos(4*arctan(a*x))-1)/arctan(a*x)^(1/2)
Exception generated. \[ \int \frac {x^2}{\left (c+a^2 c x^2\right )^3 \arctan (a x)^{3/2}} \, dx=\text {Exception raised: TypeError} \] Input:
integrate(x^2/(a^2*c*x^2+c)^3/arctan(a*x)^(3/2),x, algorithm="fricas")
Output:
Exception raised: TypeError >> Error detected within library code: inte grate: implementation incomplete (constant residues)
\[ \int \frac {x^2}{\left (c+a^2 c x^2\right )^3 \arctan (a x)^{3/2}} \, dx=\frac {\int \frac {x^{2}}{a^{6} x^{6} \operatorname {atan}^{\frac {3}{2}}{\left (a x \right )} + 3 a^{4} x^{4} \operatorname {atan}^{\frac {3}{2}}{\left (a x \right )} + 3 a^{2} x^{2} \operatorname {atan}^{\frac {3}{2}}{\left (a x \right )} + \operatorname {atan}^{\frac {3}{2}}{\left (a x \right )}}\, dx}{c^{3}} \] Input:
integrate(x**2/(a**2*c*x**2+c)**3/atan(a*x)**(3/2),x)
Output:
Integral(x**2/(a**6*x**6*atan(a*x)**(3/2) + 3*a**4*x**4*atan(a*x)**(3/2) + 3*a**2*x**2*atan(a*x)**(3/2) + atan(a*x)**(3/2)), x)/c**3
Exception generated. \[ \int \frac {x^2}{\left (c+a^2 c x^2\right )^3 \arctan (a x)^{3/2}} \, dx=\text {Exception raised: RuntimeError} \] Input:
integrate(x^2/(a^2*c*x^2+c)^3/arctan(a*x)^(3/2),x, algorithm="maxima")
Output:
Exception raised: RuntimeError >> ECL says: expt: undefined: 0 to a negati ve exponent.
\[ \int \frac {x^2}{\left (c+a^2 c x^2\right )^3 \arctan (a x)^{3/2}} \, dx=\int { \frac {x^{2}}{{\left (a^{2} c x^{2} + c\right )}^{3} \arctan \left (a x\right )^{\frac {3}{2}}} \,d x } \] Input:
integrate(x^2/(a^2*c*x^2+c)^3/arctan(a*x)^(3/2),x, algorithm="giac")
Output:
integrate(x^2/((a^2*c*x^2 + c)^3*arctan(a*x)^(3/2)), x)
Timed out. \[ \int \frac {x^2}{\left (c+a^2 c x^2\right )^3 \arctan (a x)^{3/2}} \, dx=\int \frac {x^2}{{\mathrm {atan}\left (a\,x\right )}^{3/2}\,{\left (c\,a^2\,x^2+c\right )}^3} \,d x \] Input:
int(x^2/(atan(a*x)^(3/2)*(c + a^2*c*x^2)^3),x)
Output:
int(x^2/(atan(a*x)^(3/2)*(c + a^2*c*x^2)^3), x)
\[ \int \frac {x^2}{\left (c+a^2 c x^2\right )^3 \arctan (a x)^{3/2}} \, dx=\frac {\int \frac {\sqrt {\mathit {atan} \left (a x \right )}\, x^{2}}{\mathit {atan} \left (a x \right )^{2} a^{6} x^{6}+3 \mathit {atan} \left (a x \right )^{2} a^{4} x^{4}+3 \mathit {atan} \left (a x \right )^{2} a^{2} x^{2}+\mathit {atan} \left (a x \right )^{2}}d x}{c^{3}} \] Input:
int(x^2/(a^2*c*x^2+c)^3/atan(a*x)^(3/2),x)
Output:
int((sqrt(atan(a*x))*x**2)/(atan(a*x)**2*a**6*x**6 + 3*atan(a*x)**2*a**4*x **4 + 3*atan(a*x)**2*a**2*x**2 + atan(a*x)**2),x)/c**3