3.50 \(\int x^3 (a+b \log (c x^n))^2 \, dx\)

Optimal. Leaf size=52 \[ \frac{1}{4} x^4 \left (a+b \log \left (c x^n\right )\right )^2-\frac{1}{8} b n x^4 \left (a+b \log \left (c x^n\right )\right )+\frac{1}{32} b^2 n^2 x^4 \]

[Out]

(b^2*n^2*x^4)/32 - (b*n*x^4*(a + b*Log[c*x^n]))/8 + (x^4*(a + b*Log[c*x^n])^2)/4

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Rubi [A]  time = 0.0362843, antiderivative size = 52, normalized size of antiderivative = 1., number of steps used = 2, number of rules used = 2, integrand size = 16, \(\frac{\text{number of rules}}{\text{integrand size}}\) = 0.125, Rules used = {2305, 2304} \[ \frac{1}{4} x^4 \left (a+b \log \left (c x^n\right )\right )^2-\frac{1}{8} b n x^4 \left (a+b \log \left (c x^n\right )\right )+\frac{1}{32} b^2 n^2 x^4 \]

Antiderivative was successfully verified.

[In]

Int[x^3*(a + b*Log[c*x^n])^2,x]

[Out]

(b^2*n^2*x^4)/32 - (b*n*x^4*(a + b*Log[c*x^n]))/8 + (x^4*(a + b*Log[c*x^n])^2)/4

Rule 2305

Int[((a_.) + Log[(c_.)*(x_)^(n_.)]*(b_.))^(p_.)*((d_.)*(x_))^(m_.), x_Symbol] :> Simp[((d*x)^(m + 1)*(a + b*Lo
g[c*x^n])^p)/(d*(m + 1)), x] - Dist[(b*n*p)/(m + 1), Int[(d*x)^m*(a + b*Log[c*x^n])^(p - 1), x], x] /; FreeQ[{
a, b, c, d, m, n}, x] && NeQ[m, -1] && GtQ[p, 0]

Rule 2304

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

Rubi steps

\begin{align*} \int x^3 \left (a+b \log \left (c x^n\right )\right )^2 \, dx &=\frac{1}{4} x^4 \left (a+b \log \left (c x^n\right )\right )^2-\frac{1}{2} (b n) \int x^3 \left (a+b \log \left (c x^n\right )\right ) \, dx\\ &=\frac{1}{32} b^2 n^2 x^4-\frac{1}{8} b n x^4 \left (a+b \log \left (c x^n\right )\right )+\frac{1}{4} x^4 \left (a+b \log \left (c x^n\right )\right )^2\\ \end{align*}

Mathematica [A]  time = 0.0161885, size = 43, normalized size = 0.83 \[ \frac{1}{32} x^4 \left (-4 b n \left (a+b \log \left (c x^n\right )\right )+8 \left (a+b \log \left (c x^n\right )\right )^2+b^2 n^2\right ) \]

Antiderivative was successfully verified.

[In]

Integrate[x^3*(a + b*Log[c*x^n])^2,x]

[Out]

(x^4*(b^2*n^2 - 4*b*n*(a + b*Log[c*x^n]) + 8*(a + b*Log[c*x^n])^2))/32

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Maple [C]  time = 0.191, size = 691, normalized size = 13.3 \begin{align*} \text{result too large to display} \end{align*}

Verification of antiderivative is not currently implemented for this CAS.

[In]

int(x^3*(a+b*ln(c*x^n))^2,x)

[Out]

1/4*b^2*x^4*ln(x^n)^2+1/8*b*x^4*(2*I*b*Pi*csgn(I*x^n)*csgn(I*c*x^n)^2-2*I*b*Pi*csgn(I*x^n)*csgn(I*c*x^n)*csgn(
I*c)-2*I*b*Pi*csgn(I*c*x^n)^3+2*I*b*Pi*csgn(I*c*x^n)^2*csgn(I*c)+4*b*ln(c)-b*n+4*a)*ln(x^n)+1/32*x^4*(8*ln(c)^
2*b^2-2*Pi^2*b^2*csgn(I*c*x^n)^4*csgn(I*c)^2-4*a*b*n+b^2*n^2+8*a^2-2*I*Pi*b^2*n*csgn(I*c*x^n)^2*csgn(I*c)+8*I*
ln(c)*Pi*b^2*csgn(I*x^n)*csgn(I*c*x^n)^2+8*I*Pi*a*b*csgn(I*c*x^n)^2*csgn(I*c)-2*I*Pi*b^2*n*csgn(I*x^n)*csgn(I*
c*x^n)^2+8*I*ln(c)*Pi*b^2*csgn(I*c*x^n)^2*csgn(I*c)+8*I*Pi*a*b*csgn(I*x^n)*csgn(I*c*x^n)^2+4*Pi^2*b^2*csgn(I*x
^n)*csgn(I*c*x^n)^3*csgn(I*c)^2+4*Pi^2*b^2*csgn(I*x^n)^2*csgn(I*c*x^n)^3*csgn(I*c)-2*Pi^2*b^2*csgn(I*x^n)^2*cs
gn(I*c*x^n)^2*csgn(I*c)^2-8*Pi^2*b^2*csgn(I*x^n)*csgn(I*c*x^n)^4*csgn(I*c)-8*I*ln(c)*Pi*b^2*csgn(I*c*x^n)^3-8*
I*Pi*a*b*csgn(I*c*x^n)^3+2*I*Pi*b^2*n*csgn(I*c*x^n)^3-8*I*ln(c)*Pi*b^2*csgn(I*x^n)*csgn(I*c*x^n)*csgn(I*c)-8*I
*Pi*a*b*csgn(I*x^n)*csgn(I*c*x^n)*csgn(I*c)-2*Pi^2*b^2*csgn(I*c*x^n)^6+16*ln(c)*a*b-4*ln(c)*b^2*n+2*I*Pi*b^2*n
*csgn(I*x^n)*csgn(I*c*x^n)*csgn(I*c)+4*Pi^2*b^2*csgn(I*c*x^n)^5*csgn(I*c)+4*Pi^2*b^2*csgn(I*x^n)*csgn(I*c*x^n)
^5-2*Pi^2*b^2*csgn(I*x^n)^2*csgn(I*c*x^n)^4)

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Maxima [A]  time = 1.12839, size = 96, normalized size = 1.85 \begin{align*} \frac{1}{4} \, b^{2} x^{4} \log \left (c x^{n}\right )^{2} - \frac{1}{8} \, a b n x^{4} + \frac{1}{2} \, a b x^{4} \log \left (c x^{n}\right ) + \frac{1}{4} \, a^{2} x^{4} + \frac{1}{32} \,{\left (n^{2} x^{4} - 4 \, n x^{4} \log \left (c x^{n}\right )\right )} b^{2} \end{align*}

Verification of antiderivative is not currently implemented for this CAS.

[In]

integrate(x^3*(a+b*log(c*x^n))^2,x, algorithm="maxima")

[Out]

1/4*b^2*x^4*log(c*x^n)^2 - 1/8*a*b*n*x^4 + 1/2*a*b*x^4*log(c*x^n) + 1/4*a^2*x^4 + 1/32*(n^2*x^4 - 4*n*x^4*log(
c*x^n))*b^2

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Fricas [B]  time = 0.890636, size = 244, normalized size = 4.69 \begin{align*} \frac{1}{4} \, b^{2} n^{2} x^{4} \log \left (x\right )^{2} + \frac{1}{4} \, b^{2} x^{4} \log \left (c\right )^{2} - \frac{1}{8} \,{\left (b^{2} n - 4 \, a b\right )} x^{4} \log \left (c\right ) + \frac{1}{32} \,{\left (b^{2} n^{2} - 4 \, a b n + 8 \, a^{2}\right )} x^{4} + \frac{1}{8} \,{\left (4 \, b^{2} n x^{4} \log \left (c\right ) -{\left (b^{2} n^{2} - 4 \, a b n\right )} x^{4}\right )} \log \left (x\right ) \end{align*}

Verification of antiderivative is not currently implemented for this CAS.

[In]

integrate(x^3*(a+b*log(c*x^n))^2,x, algorithm="fricas")

[Out]

1/4*b^2*n^2*x^4*log(x)^2 + 1/4*b^2*x^4*log(c)^2 - 1/8*(b^2*n - 4*a*b)*x^4*log(c) + 1/32*(b^2*n^2 - 4*a*b*n + 8
*a^2)*x^4 + 1/8*(4*b^2*n*x^4*log(c) - (b^2*n^2 - 4*a*b*n)*x^4)*log(x)

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Sympy [B]  time = 2.9114, size = 131, normalized size = 2.52 \begin{align*} \frac{a^{2} x^{4}}{4} + \frac{a b n x^{4} \log{\left (x \right )}}{2} - \frac{a b n x^{4}}{8} + \frac{a b x^{4} \log{\left (c \right )}}{2} + \frac{b^{2} n^{2} x^{4} \log{\left (x \right )}^{2}}{4} - \frac{b^{2} n^{2} x^{4} \log{\left (x \right )}}{8} + \frac{b^{2} n^{2} x^{4}}{32} + \frac{b^{2} n x^{4} \log{\left (c \right )} \log{\left (x \right )}}{2} - \frac{b^{2} n x^{4} \log{\left (c \right )}}{8} + \frac{b^{2} x^{4} \log{\left (c \right )}^{2}}{4} \end{align*}

Verification of antiderivative is not currently implemented for this CAS.

[In]

integrate(x**3*(a+b*ln(c*x**n))**2,x)

[Out]

a**2*x**4/4 + a*b*n*x**4*log(x)/2 - a*b*n*x**4/8 + a*b*x**4*log(c)/2 + b**2*n**2*x**4*log(x)**2/4 - b**2*n**2*
x**4*log(x)/8 + b**2*n**2*x**4/32 + b**2*n*x**4*log(c)*log(x)/2 - b**2*n*x**4*log(c)/8 + b**2*x**4*log(c)**2/4

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Giac [B]  time = 1.15678, size = 150, normalized size = 2.88 \begin{align*} \frac{1}{4} \, b^{2} n^{2} x^{4} \log \left (x\right )^{2} - \frac{1}{8} \, b^{2} n^{2} x^{4} \log \left (x\right ) + \frac{1}{2} \, b^{2} n x^{4} \log \left (c\right ) \log \left (x\right ) + \frac{1}{32} \, b^{2} n^{2} x^{4} - \frac{1}{8} \, b^{2} n x^{4} \log \left (c\right ) + \frac{1}{4} \, b^{2} x^{4} \log \left (c\right )^{2} + \frac{1}{2} \, a b n x^{4} \log \left (x\right ) - \frac{1}{8} \, a b n x^{4} + \frac{1}{2} \, a b x^{4} \log \left (c\right ) + \frac{1}{4} \, a^{2} x^{4} \end{align*}

Verification of antiderivative is not currently implemented for this CAS.

[In]

integrate(x^3*(a+b*log(c*x^n))^2,x, algorithm="giac")

[Out]

1/4*b^2*n^2*x^4*log(x)^2 - 1/8*b^2*n^2*x^4*log(x) + 1/2*b^2*n*x^4*log(c)*log(x) + 1/32*b^2*n^2*x^4 - 1/8*b^2*n
*x^4*log(c) + 1/4*b^2*x^4*log(c)^2 + 1/2*a*b*n*x^4*log(x) - 1/8*a*b*n*x^4 + 1/2*a*b*x^4*log(c) + 1/4*a^2*x^4