Integrand size = 19, antiderivative size = 51 \[ \int e^{-2 \arctan (a x)} \left (c+a^2 c x^2\right ) \, dx=-\frac {\left (\frac {1}{5}-\frac {2 i}{5}\right ) 2^{1+i} c (1-i a x)^{2-i} \operatorname {Hypergeometric2F1}\left (-1-i,2-i,3-i,\frac {1}{2} (1-i a x)\right )}{a} \] Output:
(-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
Time = 0.02 (sec) , antiderivative size = 51, normalized size of antiderivative = 1.00 \[ \int e^{-2 \arctan (a x)} \left (c+a^2 c x^2\right ) \, dx=-\frac {\left (\frac {1}{5}-\frac {2 i}{5}\right ) 2^{1+i} c (1-i a x)^{2-i} \operatorname {Hypergeometric2F1}\left (-1-i,2-i,3-i,\frac {1}{2} (1-i a x)\right )}{a} \] Input:
Integrate[(c + a^2*c*x^2)/E^(2*ArcTan[a*x]),x]
Output:
((-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
Time = 0.34 (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 = {5596, 79}
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.
\(\displaystyle \int e^{-2 \arctan (a x)} \left (a^2 c x^2+c\right ) \, dx\) |
\(\Big \downarrow \) 5596 |
\(\displaystyle c \int (1-i a x)^{1-i} (i a x+1)^{1+i}dx\) |
\(\Big \downarrow \) 79 |
\(\displaystyle -\frac {\left (\frac {1}{5}-\frac {2 i}{5}\right ) 2^{1+i} c (1-i a x)^{2-i} \operatorname {Hypergeometric2F1}\left (-1-i,2-i,3-i,\frac {1}{2} (1-i a x)\right )}{a}\) |
Input:
Int[(c + a^2*c*x^2)/E^(2*ArcTan[a*x]),x]
Output:
((-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
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] && !IntegerQ[m] && !IntegerQ[n] && GtQ[b/(b*c - a*d), 0] && (RationalQ[m] || !(RationalQ[n] && GtQ[-d/(b*c - a*d), 0]))
Int[E^(ArcTan[(a_.)*(x_)]*(n_.))*((c_) + (d_.)*(x_)^2)^(p_.), x_Symbol] :> Simp[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])
\[\int \left (a^{2} c \,x^{2}+c \right ) {\mathrm e}^{-2 \arctan \left (a x \right )}d x\]
Input:
int((a^2*c*x^2+c)/exp(2*arctan(a*x)),x)
Output:
int((a^2*c*x^2+c)/exp(2*arctan(a*x)),x)
\[ \int e^{-2 \arctan (a x)} \left (c+a^2 c x^2\right ) \, dx=\int { {\left (a^{2} c x^{2} + c\right )} e^{\left (-2 \, \arctan \left (a x\right )\right )} \,d x } \] Input:
integrate((a^2*c*x^2+c)/exp(2*arctan(a*x)),x, algorithm="fricas")
Output:
integral((a^2*c*x^2 + c)*e^(-2*arctan(a*x)), x)
\[ \int e^{-2 \arctan (a x)} \left (c+a^2 c x^2\right ) \, dx=c \left (\int a^{2} x^{2} e^{- 2 \operatorname {atan}{\left (a x \right )}}\, dx + \int e^{- 2 \operatorname {atan}{\left (a x \right )}}\, dx\right ) \] Input:
integrate((a**2*c*x**2+c)/exp(2*atan(a*x)),x)
Output:
c*(Integral(a**2*x**2*exp(-2*atan(a*x)), x) + Integral(exp(-2*atan(a*x)), x))
\[ \int e^{-2 \arctan (a x)} \left (c+a^2 c x^2\right ) \, dx=\int { {\left (a^{2} c x^{2} + c\right )} e^{\left (-2 \, \arctan \left (a x\right )\right )} \,d x } \] Input:
integrate((a^2*c*x^2+c)/exp(2*arctan(a*x)),x, algorithm="maxima")
Output:
integrate((a^2*c*x^2 + c)*e^(-2*arctan(a*x)), x)
\[ \int e^{-2 \arctan (a x)} \left (c+a^2 c x^2\right ) \, dx=\int { {\left (a^{2} c x^{2} + c\right )} e^{\left (-2 \, \arctan \left (a x\right )\right )} \,d x } \] Input:
integrate((a^2*c*x^2+c)/exp(2*arctan(a*x)),x, algorithm="giac")
Output:
integrate((a^2*c*x^2 + c)*e^(-2*arctan(a*x)), x)
Timed out. \[ \int e^{-2 \arctan (a x)} \left (c+a^2 c x^2\right ) \, dx=\int {\mathrm {e}}^{-2\,\mathrm {atan}\left (a\,x\right )}\,\left (c\,a^2\,x^2+c\right ) \,d x \] Input:
int(exp(-2*atan(a*x))*(c + a^2*c*x^2),x)
Output:
int(exp(-2*atan(a*x))*(c + a^2*c*x^2), x)
\[ \int e^{-2 \arctan (a x)} \left (c+a^2 c x^2\right ) \, dx=c \left (\left (\int \frac {x^{2}}{e^{2 \mathit {atan} \left (a x \right )}}d x \right ) a^{2}+\int \frac {1}{e^{2 \mathit {atan} \left (a x \right )}}d x \right ) \] Input:
int((a^2*c*x^2+c)/exp(2*atan(a*x)),x)
Output:
c*(int(x**2/e**(2*atan(a*x)),x)*a**2 + int(1/e**(2*atan(a*x)),x))