\(\int e^{-2 \arctan (a x)} (c+a^2 c x^2) \, dx\) [289]

Optimal result

Integrand size = 19, antiderivative size = 51 \[ \int e^{-2 \arctan (a x)} \left (c+a^2 c x^2\right ) \, dx=-\frac {\left (\frac {1}{5}-\frac {2 i}{5}\right ) 2^{1+i} c (1-i a x)^{2-i} \operatorname {Hypergeometric2F1}\left (-1-i,2-i,3-i,\frac {1}{2} (1-i a x)\right )}{a} \]

[Out]

(-1/5+2/5*I)*2^(1+I)*c*(1-I*a*x)^(2-I)*hypergeom([-1-I, 2-I],[3-I],1/2-1/2*I*a*x)/a

Rubi [A] (verified)

Time = 0.02 (sec) , antiderivative size = 51, normalized size of antiderivative = 1.00, number of steps used = 2, number of rules used = 2, \(\frac {\text {number of rules}}{\text {integrand size}}\) = 0.105, Rules used = {5181, 71} \[ \int e^{-2 \arctan (a x)} \left (c+a^2 c x^2\right ) \, dx=-\frac {\left (\frac {1}{5}-\frac {2 i}{5}\right ) 2^{1+i} c (1-i a x)^{2-i} \operatorname {Hypergeometric2F1}\left (-1-i,2-i,3-i,\frac {1}{2} (1-i a x)\right )}{a} \]

[In]

Int[(c + a^2*c*x^2)/E^(2*ArcTan[a*x]),x]

[Out]

((-1/5 + (2*I)/5)*2^(1 + I)*c*(1 - I*a*x)^(2 - I)*Hypergeometric2F1[-1 - I, 2 - I, 3 - I, (1 - I*a*x)/2])/a

Rule 71

Int[((a_) + (b_.)*(x_))^(m_)*((c_) + (d_.)*(x_))^(n_), x_Symbol] :> Simp[((a + b*x)^(m + 1)/(b*(m + 1)*(b/(b*c
- a*d))^n))*Hypergeometric2F1[-n, m + 1, m + 2, (-d)*((a + b*x)/(b*c - a*d))], x] /; FreeQ[{a, b, c, d, m, n}
, x] && NeQ[b*c - a*d, 0] &&  !IntegerQ[m] &&  !IntegerQ[n] && GtQ[b/(b*c - a*d), 0] && (RationalQ[m] ||  !(Ra
tionalQ[n] && GtQ[-d/(b*c - a*d), 0]))

Rule 5181

Int[E^(ArcTan[(a_.)*(x_)]*(n_.))*((c_) + (d_.)*(x_)^2)^(p_.), x_Symbol] :> Dist[c^p, Int[(1 - I*a*x)^(p + I*(n
/2))*(1 + I*a*x)^(p - I*(n/2)), x], x] /; FreeQ[{a, c, d, n, p}, x] && EqQ[d, a^2*c] && (IntegerQ[p] || GtQ[c,
0])

Rubi steps \begin{align*} \text {integral}& = c \int (1-i a x)^{1-i} (1+i a x)^{1+i} \, dx \\ & = -\frac {\left (\frac {1}{5}-\frac {2 i}{5}\right ) 2^{1+i} c (1-i a x)^{2-i} \operatorname {Hypergeometric2F1}\left (-1-i,2-i,3-i,\frac {1}{2} (1-i a x)\right )}{a} \\ \end{align*}

Mathematica [A] (verified)

Time = 0.01 (sec) , antiderivative size = 51, normalized size of antiderivative = 1.00 \[ \int e^{-2 \arctan (a x)} \left (c+a^2 c x^2\right ) \, dx=-\frac {\left (\frac {1}{5}-\frac {2 i}{5}\right ) 2^{1+i} c (1-i a x)^{2-i} \operatorname {Hypergeometric2F1}\left (-1-i,2-i,3-i,\frac {1}{2} (1-i a x)\right )}{a} \]

[In]

Integrate[(c + a^2*c*x^2)/E^(2*ArcTan[a*x]),x]

[Out]

((-1/5 + (2*I)/5)*2^(1 + I)*c*(1 - I*a*x)^(2 - I)*Hypergeometric2F1[-1 - I, 2 - I, 3 - I, (1 - I*a*x)/2])/a

Maple [F]

\[\int \left (a^{2} c \,x^{2}+c \right ) {\mathrm e}^{-2 \arctan \left (a x \right )}d x\]

[In]

int((a^2*c*x^2+c)/exp(2*arctan(a*x)),x)

[Out]

int((a^2*c*x^2+c)/exp(2*arctan(a*x)),x)

Fricas [F]

\[ \int e^{-2 \arctan (a x)} \left (c+a^2 c x^2\right ) \, dx=\int { {\left (a^{2} c x^{2} + c\right )} e^{\left (-2 \, \arctan \left (a x\right )\right )} \,d x } \]

[In]

integrate((a^2*c*x^2+c)/exp(2*arctan(a*x)),x, algorithm="fricas")

[Out]

integral((a^2*c*x^2 + c)*e^(-2*arctan(a*x)), x)

Sympy [F]

\[ \int e^{-2 \arctan (a x)} \left (c+a^2 c x^2\right ) \, dx=c \left (\int a^{2} x^{2} e^{- 2 \operatorname {atan}{\left (a x \right )}}\, dx + \int e^{- 2 \operatorname {atan}{\left (a x \right )}}\, dx\right ) \]

[In]

integrate((a**2*c*x**2+c)/exp(2*atan(a*x)),x)

[Out]

c*(Integral(a**2*x**2*exp(-2*atan(a*x)), x) + Integral(exp(-2*atan(a*x)), x))

Maxima [F]

\[ \int e^{-2 \arctan (a x)} \left (c+a^2 c x^2\right ) \, dx=\int { {\left (a^{2} c x^{2} + c\right )} e^{\left (-2 \, \arctan \left (a x\right )\right )} \,d x } \]

[In]

integrate((a^2*c*x^2+c)/exp(2*arctan(a*x)),x, algorithm="maxima")

[Out]

integrate((a^2*c*x^2 + c)*e^(-2*arctan(a*x)), x)

Giac [F]

\[ \int e^{-2 \arctan (a x)} \left (c+a^2 c x^2\right ) \, dx=\int { {\left (a^{2} c x^{2} + c\right )} e^{\left (-2 \, \arctan \left (a x\right )\right )} \,d x } \]

[In]

integrate((a^2*c*x^2+c)/exp(2*arctan(a*x)),x, algorithm="giac")

[Out]

sage0*x

Mupad [F(-1)]

Timed out. \[ \int e^{-2 \arctan (a x)} \left (c+a^2 c x^2\right ) \, dx=\int {\mathrm {e}}^{-2\,\mathrm {atan}\left (a\,x\right )}\,\left (c\,a^2\,x^2+c\right ) \,d x \]

[In]

int(exp(-2*atan(a*x))*(c + a^2*c*x^2),x)

[Out]

int(exp(-2*atan(a*x))*(c + a^2*c*x^2), x)