3.95 \(\int \frac{x^2 (4+x^2+3 x^4+5 x^6)}{(2+3 x^2+x^4)^3} \, dx\)

Optimal. Leaf size=72 \[ \frac{x \left (25 x^2+24\right )}{4 \left (x^4+3 x^2+2\right )^2}-\frac{x \left (130 x^2+211\right )}{8 \left (x^4+3 x^2+2\right )}+\frac{317}{8} \tan ^{-1}(x)-\frac{447 \tan ^{-1}\left (\frac{x}{\sqrt{2}}\right )}{8 \sqrt{2}} \]

[Out]

(x*(24 + 25*x^2))/(4*(2 + 3*x^2 + x^4)^2) - (x*(211 + 130*x^2))/(8*(2 + 3*x^2 + x^4)) + (317*ArcTan[x])/8 - (4
47*ArcTan[x/Sqrt[2]])/(8*Sqrt[2])

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Rubi [A]  time = 0.0655951, antiderivative size = 72, normalized size of antiderivative = 1., number of steps used = 5, number of rules used = 4, integrand size = 31, \(\frac{\text{number of rules}}{\text{integrand size}}\) = 0.129, Rules used = {1668, 1678, 1166, 203} \[ \frac{x \left (25 x^2+24\right )}{4 \left (x^4+3 x^2+2\right )^2}-\frac{x \left (130 x^2+211\right )}{8 \left (x^4+3 x^2+2\right )}+\frac{317}{8} \tan ^{-1}(x)-\frac{447 \tan ^{-1}\left (\frac{x}{\sqrt{2}}\right )}{8 \sqrt{2}} \]

Antiderivative was successfully verified.

[In]

Int[(x^2*(4 + x^2 + 3*x^4 + 5*x^6))/(2 + 3*x^2 + x^4)^3,x]

[Out]

(x*(24 + 25*x^2))/(4*(2 + 3*x^2 + x^4)^2) - (x*(211 + 130*x^2))/(8*(2 + 3*x^2 + x^4)) + (317*ArcTan[x])/8 - (4
47*ArcTan[x/Sqrt[2]])/(8*Sqrt[2])

Rule 1668

Int[(Pq_)*(x_)^(m_)*((a_) + (b_.)*(x_)^2 + (c_.)*(x_)^4)^(p_), x_Symbol] :> With[{d = Coeff[PolynomialRemainde
r[x^m*Pq, a + b*x^2 + c*x^4, x], x, 0], e = Coeff[PolynomialRemainder[x^m*Pq, a + b*x^2 + c*x^4, x], x, 2]}, S
imp[(x*(a + b*x^2 + c*x^4)^(p + 1)*(a*b*e - d*(b^2 - 2*a*c) - c*(b*d - 2*a*e)*x^2))/(2*a*(p + 1)*(b^2 - 4*a*c)
), x] + Dist[1/(2*a*(p + 1)*(b^2 - 4*a*c)), Int[(a + b*x^2 + c*x^4)^(p + 1)*ExpandToSum[2*a*(p + 1)*(b^2 - 4*a
*c)*PolynomialQuotient[x^m*Pq, a + b*x^2 + c*x^4, x] + b^2*d*(2*p + 3) - 2*a*c*d*(4*p + 5) - a*b*e + c*(4*p +
7)*(b*d - 2*a*e)*x^2, x], x], x]] /; FreeQ[{a, b, c}, x] && PolyQ[Pq, x^2] && GtQ[Expon[Pq, x^2], 1] && NeQ[b^
2 - 4*a*c, 0] && LtQ[p, -1] && IGtQ[m/2, 0]

Rule 1678

Int[(Pq_)*((a_) + (b_.)*(x_)^2 + (c_.)*(x_)^4)^(p_), x_Symbol] :> With[{d = Coeff[PolynomialRemainder[Pq, a +
b*x^2 + c*x^4, x], x, 0], e = Coeff[PolynomialRemainder[Pq, a + b*x^2 + c*x^4, x], x, 2]}, Simp[(x*(a + b*x^2
+ c*x^4)^(p + 1)*(a*b*e - d*(b^2 - 2*a*c) - c*(b*d - 2*a*e)*x^2))/(2*a*(p + 1)*(b^2 - 4*a*c)), x] + Dist[1/(2*
a*(p + 1)*(b^2 - 4*a*c)), Int[(a + b*x^2 + c*x^4)^(p + 1)*ExpandToSum[2*a*(p + 1)*(b^2 - 4*a*c)*PolynomialQuot
ient[Pq, a + b*x^2 + c*x^4, x] + b^2*d*(2*p + 3) - 2*a*c*d*(4*p + 5) - a*b*e + c*(4*p + 7)*(b*d - 2*a*e)*x^2,
x], x], x]] /; FreeQ[{a, b, c}, x] && PolyQ[Pq, x^2] && Expon[Pq, x^2] > 1 && NeQ[b^2 - 4*a*c, 0] && LtQ[p, -1
]

Rule 1166

Int[((d_) + (e_.)*(x_)^2)/((a_) + (b_.)*(x_)^2 + (c_.)*(x_)^4), x_Symbol] :> With[{q = Rt[b^2 - 4*a*c, 2]}, Di
st[e/2 + (2*c*d - b*e)/(2*q), Int[1/(b/2 - q/2 + c*x^2), x], x] + Dist[e/2 - (2*c*d - b*e)/(2*q), Int[1/(b/2 +
q/2 + c*x^2), x], x]] /; FreeQ[{a, b, c, d, e}, x] && NeQ[b^2 - 4*a*c, 0] && NeQ[c*d^2 - a*e^2, 0] && PosQ[b^
2 - 4*a*c]

Rule 203

Int[((a_) + (b_.)*(x_)^2)^(-1), x_Symbol] :> Simp[(1*ArcTan[(Rt[b, 2]*x)/Rt[a, 2]])/(Rt[a, 2]*Rt[b, 2]), x] /;
FreeQ[{a, b}, x] && PosQ[a/b] && (GtQ[a, 0] || GtQ[b, 0])

Rubi steps

\begin{align*} \int \frac{x^2 \left (4+x^2+3 x^4+5 x^6\right )}{\left (2+3 x^2+x^4\right )^3} \, dx &=\frac{x \left (24+25 x^2\right )}{4 \left (2+3 x^2+x^4\right )^2}-\frac{1}{8} \int \frac{48-154 x^2-40 x^4}{\left (2+3 x^2+x^4\right )^2} \, dx\\ &=\frac{x \left (24+25 x^2\right )}{4 \left (2+3 x^2+x^4\right )^2}-\frac{x \left (211+130 x^2\right )}{8 \left (2+3 x^2+x^4\right )}+\frac{1}{32} \int \frac{748-520 x^2}{2+3 x^2+x^4} \, dx\\ &=\frac{x \left (24+25 x^2\right )}{4 \left (2+3 x^2+x^4\right )^2}-\frac{x \left (211+130 x^2\right )}{8 \left (2+3 x^2+x^4\right )}+\frac{317}{8} \int \frac{1}{1+x^2} \, dx-\frac{447}{8} \int \frac{1}{2+x^2} \, dx\\ &=\frac{x \left (24+25 x^2\right )}{4 \left (2+3 x^2+x^4\right )^2}-\frac{x \left (211+130 x^2\right )}{8 \left (2+3 x^2+x^4\right )}+\frac{317}{8} \tan ^{-1}(x)-\frac{447 \tan ^{-1}\left (\frac{x}{\sqrt{2}}\right )}{8 \sqrt{2}}\\ \end{align*}

Mathematica [A]  time = 0.0627458, size = 56, normalized size = 0.78 \[ \frac{1}{16} \left (-\frac{2 x \left (130 x^6+601 x^4+843 x^2+374\right )}{\left (x^4+3 x^2+2\right )^2}+634 \tan ^{-1}(x)-447 \sqrt{2} \tan ^{-1}\left (\frac{x}{\sqrt{2}}\right )\right ) \]

Antiderivative was successfully verified.

[In]

Integrate[(x^2*(4 + x^2 + 3*x^4 + 5*x^6))/(2 + 3*x^2 + x^4)^3,x]

[Out]

((-2*x*(374 + 843*x^2 + 601*x^4 + 130*x^6))/(2 + 3*x^2 + x^4)^2 + 634*ArcTan[x] - 447*Sqrt[2]*ArcTan[x/Sqrt[2]
])/16

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Maple [A]  time = 0.012, size = 53, normalized size = 0.7 \begin{align*} -{\frac{1}{ \left ({x}^{2}+2 \right ) ^{2}} \left ({\frac{103\,{x}^{3}}{8}}+{\frac{129\,x}{4}} \right ) }-{\frac{447\,\sqrt{2}}{16}\arctan \left ({\frac{x\sqrt{2}}{2}} \right ) }+{\frac{1}{ \left ({x}^{2}+1 \right ) ^{2}} \left ( -{\frac{27\,{x}^{3}}{8}}-{\frac{29\,x}{8}} \right ) }+{\frac{317\,\arctan \left ( x \right ) }{8}} \end{align*}

Verification of antiderivative is not currently implemented for this CAS.

[In]

int(x^2*(5*x^6+3*x^4+x^2+4)/(x^4+3*x^2+2)^3,x)

[Out]

-(103/8*x^3+129/4*x)/(x^2+2)^2-447/16*arctan(1/2*x*2^(1/2))*2^(1/2)+(-27/8*x^3-29/8*x)/(x^2+1)^2+317/8*arctan(
x)

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Maxima [A]  time = 1.49742, size = 81, normalized size = 1.12 \begin{align*} -\frac{447}{16} \, \sqrt{2} \arctan \left (\frac{1}{2} \, \sqrt{2} x\right ) - \frac{130 \, x^{7} + 601 \, x^{5} + 843 \, x^{3} + 374 \, x}{8 \,{\left (x^{8} + 6 \, x^{6} + 13 \, x^{4} + 12 \, x^{2} + 4\right )}} + \frac{317}{8} \, \arctan \left (x\right ) \end{align*}

Verification of antiderivative is not currently implemented for this CAS.

[In]

integrate(x^2*(5*x^6+3*x^4+x^2+4)/(x^4+3*x^2+2)^3,x, algorithm="maxima")

[Out]

-447/16*sqrt(2)*arctan(1/2*sqrt(2)*x) - 1/8*(130*x^7 + 601*x^5 + 843*x^3 + 374*x)/(x^8 + 6*x^6 + 13*x^4 + 12*x
^2 + 4) + 317/8*arctan(x)

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Fricas [A]  time = 1.52068, size = 279, normalized size = 3.88 \begin{align*} -\frac{260 \, x^{7} + 1202 \, x^{5} + 1686 \, x^{3} + 447 \, \sqrt{2}{\left (x^{8} + 6 \, x^{6} + 13 \, x^{4} + 12 \, x^{2} + 4\right )} \arctan \left (\frac{1}{2} \, \sqrt{2} x\right ) - 634 \,{\left (x^{8} + 6 \, x^{6} + 13 \, x^{4} + 12 \, x^{2} + 4\right )} \arctan \left (x\right ) + 748 \, x}{16 \,{\left (x^{8} + 6 \, x^{6} + 13 \, x^{4} + 12 \, x^{2} + 4\right )}} \end{align*}

Verification of antiderivative is not currently implemented for this CAS.

[In]

integrate(x^2*(5*x^6+3*x^4+x^2+4)/(x^4+3*x^2+2)^3,x, algorithm="fricas")

[Out]

-1/16*(260*x^7 + 1202*x^5 + 1686*x^3 + 447*sqrt(2)*(x^8 + 6*x^6 + 13*x^4 + 12*x^2 + 4)*arctan(1/2*sqrt(2)*x) -
634*(x^8 + 6*x^6 + 13*x^4 + 12*x^2 + 4)*arctan(x) + 748*x)/(x^8 + 6*x^6 + 13*x^4 + 12*x^2 + 4)

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Sympy [A]  time = 0.236459, size = 65, normalized size = 0.9 \begin{align*} - \frac{130 x^{7} + 601 x^{5} + 843 x^{3} + 374 x}{8 x^{8} + 48 x^{6} + 104 x^{4} + 96 x^{2} + 32} + \frac{317 \operatorname{atan}{\left (x \right )}}{8} - \frac{447 \sqrt{2} \operatorname{atan}{\left (\frac{\sqrt{2} x}{2} \right )}}{16} \end{align*}

Verification of antiderivative is not currently implemented for this CAS.

[In]

integrate(x**2*(5*x**6+3*x**4+x**2+4)/(x**4+3*x**2+2)**3,x)

[Out]

-(130*x**7 + 601*x**5 + 843*x**3 + 374*x)/(8*x**8 + 48*x**6 + 104*x**4 + 96*x**2 + 32) + 317*atan(x)/8 - 447*s
qrt(2)*atan(sqrt(2)*x/2)/16

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Giac [A]  time = 1.10467, size = 68, normalized size = 0.94 \begin{align*} -\frac{447}{16} \, \sqrt{2} \arctan \left (\frac{1}{2} \, \sqrt{2} x\right ) - \frac{130 \, x^{7} + 601 \, x^{5} + 843 \, x^{3} + 374 \, x}{8 \,{\left (x^{4} + 3 \, x^{2} + 2\right )}^{2}} + \frac{317}{8} \, \arctan \left (x\right ) \end{align*}

Verification of antiderivative is not currently implemented for this CAS.

[In]

integrate(x^2*(5*x^6+3*x^4+x^2+4)/(x^4+3*x^2+2)^3,x, algorithm="giac")

[Out]

-447/16*sqrt(2)*arctan(1/2*sqrt(2)*x) - 1/8*(130*x^7 + 601*x^5 + 843*x^3 + 374*x)/(x^4 + 3*x^2 + 2)^2 + 317/8*
arctan(x)