Integrand size = 12, antiderivative size = 191 \[ \int \frac {x}{a+b \cosh ^2(x)} \, dx=\frac {x \log \left (1+\frac {b e^{2 x}}{2 a+b-2 \sqrt {a} \sqrt {a+b}}\right )}{2 \sqrt {a} \sqrt {a+b}}-\frac {x \log \left (1+\frac {b e^{2 x}}{2 a+b+2 \sqrt {a} \sqrt {a+b}}\right )}{2 \sqrt {a} \sqrt {a+b}}+\frac {\operatorname {PolyLog}\left (2,-\frac {b e^{2 x}}{2 a+b-2 \sqrt {a} \sqrt {a+b}}\right )}{4 \sqrt {a} \sqrt {a+b}}-\frac {\operatorname {PolyLog}\left (2,-\frac {b e^{2 x}}{2 a+b+2 \sqrt {a} \sqrt {a+b}}\right )}{4 \sqrt {a} \sqrt {a+b}} \]
1/2*x*ln(1+b*exp(2*x)/(2*a+b-2*a^(1/2)*(a+b)^(1/2)))/a^(1/2)/(a+b)^(1/2)-1 /2*x*ln(1+b*exp(2*x)/(2*a+b+2*a^(1/2)*(a+b)^(1/2)))/a^(1/2)/(a+b)^(1/2)+1/ 4*polylog(2,-b*exp(2*x)/(2*a+b-2*a^(1/2)*(a+b)^(1/2)))/a^(1/2)/(a+b)^(1/2) -1/4*polylog(2,-b*exp(2*x)/(2*a+b+2*a^(1/2)*(a+b)^(1/2)))/a^(1/2)/(a+b)^(1 /2)
Time = 0.47 (sec) , antiderivative size = 284, normalized size of antiderivative = 1.49 \[ \int \frac {x}{a+b \cosh ^2(x)} \, dx=\frac {x \log \left (1-\frac {e^x}{\sqrt {-\frac {2 a+b-2 \sqrt {a (a+b)}}{b}}}\right )+x \log \left (1+\frac {e^x}{\sqrt {-\frac {2 a+b-2 \sqrt {a (a+b)}}{b}}}\right )-x \log \left (1-\frac {e^x}{\sqrt {-\frac {2 a+b+2 \sqrt {a (a+b)}}{b}}}\right )-x \log \left (1+\frac {e^x}{\sqrt {-\frac {2 a+b+2 \sqrt {a (a+b)}}{b}}}\right )+\operatorname {PolyLog}\left (2,-\frac {e^x}{\sqrt {-\frac {2 a+b-2 \sqrt {a (a+b)}}{b}}}\right )+\operatorname {PolyLog}\left (2,\frac {e^x}{\sqrt {-\frac {2 a+b-2 \sqrt {a (a+b)}}{b}}}\right )-\operatorname {PolyLog}\left (2,-\frac {e^x}{\sqrt {-\frac {2 a+b+2 \sqrt {a (a+b)}}{b}}}\right )-\operatorname {PolyLog}\left (2,\frac {e^x}{\sqrt {-\frac {2 a+b+2 \sqrt {a (a+b)}}{b}}}\right )}{2 \sqrt {a (a+b)}} \]
(x*Log[1 - E^x/Sqrt[-((2*a + b - 2*Sqrt[a*(a + b)])/b)]] + x*Log[1 + E^x/S qrt[-((2*a + b - 2*Sqrt[a*(a + b)])/b)]] - x*Log[1 - E^x/Sqrt[-((2*a + b + 2*Sqrt[a*(a + b)])/b)]] - x*Log[1 + E^x/Sqrt[-((2*a + b + 2*Sqrt[a*(a + b )])/b)]] + PolyLog[2, -(E^x/Sqrt[-((2*a + b - 2*Sqrt[a*(a + b)])/b)])] + P olyLog[2, E^x/Sqrt[-((2*a + b - 2*Sqrt[a*(a + b)])/b)]] - PolyLog[2, -(E^x /Sqrt[-((2*a + b + 2*Sqrt[a*(a + b)])/b)])] - PolyLog[2, E^x/Sqrt[-((2*a + b + 2*Sqrt[a*(a + b)])/b)]])/(2*Sqrt[a*(a + b)])
Time = 0.75 (sec) , antiderivative size = 193, normalized size of antiderivative = 1.01, number of steps used = 9, number of rules used = 8, \(\frac {\text {number of rules}}{\text {integrand size}}\) = 0.667, Rules used = {6164, 3042, 3801, 2694, 27, 2620, 2715, 2838}
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.
\(\displaystyle \int \frac {x}{a+b \cosh ^2(x)} \, dx\) |
\(\Big \downarrow \) 6164 |
\(\displaystyle 2 \int \frac {x}{2 a+b+b \cosh (2 x)}dx\) |
\(\Big \downarrow \) 3042 |
\(\displaystyle 2 \int \frac {x}{2 a+b+b \sin \left (2 i x+\frac {\pi }{2}\right )}dx\) |
\(\Big \downarrow \) 3801 |
\(\displaystyle 4 \int \frac {e^{2 x} x}{e^{4 x} b+b+2 (2 a+b) e^{2 x}}dx\) |
\(\Big \downarrow \) 2694 |
\(\displaystyle 4 \left (\frac {b \int \frac {e^{2 x} x}{2 \left (2 a-2 \sqrt {a+b} \sqrt {a}+b e^{2 x}+b\right )}dx}{2 \sqrt {a} \sqrt {a+b}}-\frac {b \int \frac {e^{2 x} x}{2 \left (2 a+2 \sqrt {a+b} \sqrt {a}+b e^{2 x}+b\right )}dx}{2 \sqrt {a} \sqrt {a+b}}\right )\) |
\(\Big \downarrow \) 27 |
\(\displaystyle 4 \left (\frac {b \int \frac {e^{2 x} x}{2 a-2 \sqrt {a+b} \sqrt {a}+b e^{2 x}+b}dx}{4 \sqrt {a} \sqrt {a+b}}-\frac {b \int \frac {e^{2 x} x}{2 a+2 \sqrt {a+b} \sqrt {a}+b e^{2 x}+b}dx}{4 \sqrt {a} \sqrt {a+b}}\right )\) |
\(\Big \downarrow \) 2620 |
\(\displaystyle 4 \left (\frac {b \left (\frac {x \log \left (\frac {b e^{2 x}}{-2 \sqrt {a} \sqrt {a+b}+2 a+b}+1\right )}{2 b}-\frac {\int \log \left (\frac {e^{2 x} b}{2 a-2 \sqrt {a+b} \sqrt {a}+b}+1\right )dx}{2 b}\right )}{4 \sqrt {a} \sqrt {a+b}}-\frac {b \left (\frac {x \log \left (\frac {b e^{2 x}}{2 \sqrt {a} \sqrt {a+b}+2 a+b}+1\right )}{2 b}-\frac {\int \log \left (\frac {e^{2 x} b}{2 a+2 \sqrt {a+b} \sqrt {a}+b}+1\right )dx}{2 b}\right )}{4 \sqrt {a} \sqrt {a+b}}\right )\) |
\(\Big \downarrow \) 2715 |
\(\displaystyle 4 \left (\frac {b \left (\frac {x \log \left (\frac {b e^{2 x}}{-2 \sqrt {a} \sqrt {a+b}+2 a+b}+1\right )}{2 b}-\frac {\int e^{-2 x} \log \left (\frac {e^{2 x} b}{2 a-2 \sqrt {a+b} \sqrt {a}+b}+1\right )de^{2 x}}{4 b}\right )}{4 \sqrt {a} \sqrt {a+b}}-\frac {b \left (\frac {x \log \left (\frac {b e^{2 x}}{2 \sqrt {a} \sqrt {a+b}+2 a+b}+1\right )}{2 b}-\frac {\int e^{-2 x} \log \left (\frac {e^{2 x} b}{2 a+2 \sqrt {a+b} \sqrt {a}+b}+1\right )de^{2 x}}{4 b}\right )}{4 \sqrt {a} \sqrt {a+b}}\right )\) |
\(\Big \downarrow \) 2838 |
\(\displaystyle 4 \left (\frac {b \left (\frac {\operatorname {PolyLog}\left (2,-\frac {b e^{2 x}}{2 a-2 \sqrt {a+b} \sqrt {a}+b}\right )}{4 b}+\frac {x \log \left (\frac {b e^{2 x}}{-2 \sqrt {a} \sqrt {a+b}+2 a+b}+1\right )}{2 b}\right )}{4 \sqrt {a} \sqrt {a+b}}-\frac {b \left (\frac {\operatorname {PolyLog}\left (2,-\frac {b e^{2 x}}{2 a+2 \sqrt {a+b} \sqrt {a}+b}\right )}{4 b}+\frac {x \log \left (\frac {b e^{2 x}}{2 \sqrt {a} \sqrt {a+b}+2 a+b}+1\right )}{2 b}\right )}{4 \sqrt {a} \sqrt {a+b}}\right )\) |
4*((b*((x*Log[1 + (b*E^(2*x))/(2*a + b - 2*Sqrt[a]*Sqrt[a + b])])/(2*b) + PolyLog[2, -((b*E^(2*x))/(2*a + b - 2*Sqrt[a]*Sqrt[a + b]))]/(4*b)))/(4*Sq rt[a]*Sqrt[a + b]) - (b*((x*Log[1 + (b*E^(2*x))/(2*a + b + 2*Sqrt[a]*Sqrt[ a + b])])/(2*b) + PolyLog[2, -((b*E^(2*x))/(2*a + b + 2*Sqrt[a]*Sqrt[a + b ]))]/(4*b)))/(4*Sqrt[a]*Sqrt[a + b]))
3.3.10.3.1 Defintions of rubi rules used
Int[(a_)*(Fx_), x_Symbol] :> Simp[a Int[Fx, x], x] /; FreeQ[a, x] && !Ma tchQ[Fx, (b_)*(Gx_) /; FreeQ[b, x]]
Int[(((F_)^((g_.)*((e_.) + (f_.)*(x_))))^(n_.)*((c_.) + (d_.)*(x_))^(m_.))/ ((a_) + (b_.)*((F_)^((g_.)*((e_.) + (f_.)*(x_))))^(n_.)), x_Symbol] :> Simp [((c + d*x)^m/(b*f*g*n*Log[F]))*Log[1 + b*((F^(g*(e + f*x)))^n/a)], x] - Si mp[d*(m/(b*f*g*n*Log[F])) Int[(c + d*x)^(m - 1)*Log[1 + b*((F^(g*(e + f*x )))^n/a)], x], x] /; FreeQ[{F, a, b, c, d, e, f, g, n}, x] && IGtQ[m, 0]
Int[((F_)^(u_)*((f_.) + (g_.)*(x_))^(m_.))/((a_.) + (b_.)*(F_)^(u_) + (c_.) *(F_)^(v_)), x_Symbol] :> With[{q = Rt[b^2 - 4*a*c, 2]}, Simp[2*(c/q) Int [(f + g*x)^m*(F^u/(b - q + 2*c*F^u)), x], x] - Simp[2*(c/q) Int[(f + g*x) ^m*(F^u/(b + q + 2*c*F^u)), x], x]] /; FreeQ[{F, a, b, c, f, g}, x] && EqQ[ v, 2*u] && LinearQ[u, x] && NeQ[b^2 - 4*a*c, 0] && IGtQ[m, 0]
Int[Log[(a_) + (b_.)*((F_)^((e_.)*((c_.) + (d_.)*(x_))))^(n_.)], x_Symbol] :> Simp[1/(d*e*n*Log[F]) Subst[Int[Log[a + b*x]/x, x], x, (F^(e*(c + d*x) ))^n], x] /; FreeQ[{F, a, b, c, d, e, n}, x] && GtQ[a, 0]
Int[Log[(c_.)*((d_) + (e_.)*(x_)^(n_.))]/(x_), x_Symbol] :> Simp[-PolyLog[2 , (-c)*e*x^n]/n, x] /; FreeQ[{c, d, e, n}, x] && EqQ[c*d, 1]
Int[((c_.) + (d_.)*(x_))^(m_.)/((a_) + (b_.)*sin[(e_.) + Pi*(k_.) + (Comple x[0, fz_])*(f_.)*(x_)]), x_Symbol] :> Simp[2 Int[((c + d*x)^m*(E^((-I)*e + f*fz*x)/(b + (2*a*E^((-I)*e + f*fz*x))/E^(I*Pi*(k - 1/2)) - (b*E^(2*((-I) *e + f*fz*x)))/E^(2*I*k*Pi))))/E^(I*Pi*(k - 1/2)), x], x] /; FreeQ[{a, b, c , d, e, f, fz}, x] && IntegerQ[2*k] && NeQ[a^2 - b^2, 0] && IGtQ[m, 0]
Int[(Cosh[(c_.) + (d_.)*(x_)]^2*(b_.) + (a_))^(n_)*(x_)^(m_.), x_Symbol] :> Simp[1/2^n Int[x^m*(2*a + b + b*Cosh[2*c + 2*d*x])^n, x], x] /; FreeQ[{a , b, c, d}, x] && NeQ[a - b, 0] && IGtQ[m, 0] && ILtQ[n, 0] && (EqQ[n, -1] || (EqQ[m, 1] && EqQ[n, -2]))
Leaf count of result is larger than twice the leaf count of optimal. \(486\) vs. \(2(147)=294\).
Time = 0.16 (sec) , antiderivative size = 487, normalized size of antiderivative = 2.55
method | result | size |
risch | \(\frac {x \ln \left (1-\frac {b \,{\mathrm e}^{2 x}}{2 \sqrt {a \left (a +b \right )}-2 a -b}\right )}{2 \sqrt {a \left (a +b \right )}}-\frac {x^{2}}{2 \sqrt {a \left (a +b \right )}}+\frac {\operatorname {polylog}\left (2, \frac {b \,{\mathrm e}^{2 x}}{2 \sqrt {a \left (a +b \right )}-2 a -b}\right )}{4 \sqrt {a \left (a +b \right )}}+\frac {\ln \left (1-\frac {b \,{\mathrm e}^{2 x}}{-2 \sqrt {a \left (a +b \right )}-2 a -b}\right ) x}{-2 \sqrt {a \left (a +b \right )}-2 a -b}-\frac {x^{2}}{-2 \sqrt {a \left (a +b \right )}-2 a -b}+\frac {\ln \left (1-\frac {b \,{\mathrm e}^{2 x}}{-2 \sqrt {a \left (a +b \right )}-2 a -b}\right ) a x}{\sqrt {a \left (a +b \right )}\, \left (-2 \sqrt {a \left (a +b \right )}-2 a -b \right )}+\frac {\ln \left (1-\frac {b \,{\mathrm e}^{2 x}}{-2 \sqrt {a \left (a +b \right )}-2 a -b}\right ) b x}{2 \sqrt {a \left (a +b \right )}\, \left (-2 \sqrt {a \left (a +b \right )}-2 a -b \right )}-\frac {a \,x^{2}}{\sqrt {a \left (a +b \right )}\, \left (-2 \sqrt {a \left (a +b \right )}-2 a -b \right )}-\frac {b \,x^{2}}{2 \sqrt {a \left (a +b \right )}\, \left (-2 \sqrt {a \left (a +b \right )}-2 a -b \right )}+\frac {\operatorname {polylog}\left (2, \frac {b \,{\mathrm e}^{2 x}}{-2 \sqrt {a \left (a +b \right )}-2 a -b}\right )}{-4 \sqrt {a \left (a +b \right )}-4 a -2 b}+\frac {\operatorname {polylog}\left (2, \frac {b \,{\mathrm e}^{2 x}}{-2 \sqrt {a \left (a +b \right )}-2 a -b}\right ) a}{2 \sqrt {a \left (a +b \right )}\, \left (-2 \sqrt {a \left (a +b \right )}-2 a -b \right )}+\frac {\operatorname {polylog}\left (2, \frac {b \,{\mathrm e}^{2 x}}{-2 \sqrt {a \left (a +b \right )}-2 a -b}\right ) b}{4 \sqrt {a \left (a +b \right )}\, \left (-2 \sqrt {a \left (a +b \right )}-2 a -b \right )}\) | \(487\) |
1/2/(a*(a+b))^(1/2)*x*ln(1-b*exp(2*x)/(2*(a*(a+b))^(1/2)-2*a-b))-1/2/(a*(a +b))^(1/2)*x^2+1/4/(a*(a+b))^(1/2)*polylog(2,b*exp(2*x)/(2*(a*(a+b))^(1/2) -2*a-b))+1/(-2*(a*(a+b))^(1/2)-2*a-b)*ln(1-b*exp(2*x)/(-2*(a*(a+b))^(1/2)- 2*a-b))*x-1/(-2*(a*(a+b))^(1/2)-2*a-b)*x^2+1/(a*(a+b))^(1/2)/(-2*(a*(a+b)) ^(1/2)-2*a-b)*ln(1-b*exp(2*x)/(-2*(a*(a+b))^(1/2)-2*a-b))*a*x+1/2/(a*(a+b) )^(1/2)/(-2*(a*(a+b))^(1/2)-2*a-b)*ln(1-b*exp(2*x)/(-2*(a*(a+b))^(1/2)-2*a -b))*b*x-1/(a*(a+b))^(1/2)/(-2*(a*(a+b))^(1/2)-2*a-b)*a*x^2-1/2/(a*(a+b))^ (1/2)/(-2*(a*(a+b))^(1/2)-2*a-b)*b*x^2+1/2/(-2*(a*(a+b))^(1/2)-2*a-b)*poly log(2,b*exp(2*x)/(-2*(a*(a+b))^(1/2)-2*a-b))+1/2/(a*(a+b))^(1/2)/(-2*(a*(a +b))^(1/2)-2*a-b)*polylog(2,b*exp(2*x)/(-2*(a*(a+b))^(1/2)-2*a-b))*a+1/4/( a*(a+b))^(1/2)/(-2*(a*(a+b))^(1/2)-2*a-b)*polylog(2,b*exp(2*x)/(-2*(a*(a+b ))^(1/2)-2*a-b))*b
Leaf count of result is larger than twice the leaf count of optimal. 780 vs. \(2 (149) = 298\).
Time = 0.32 (sec) , antiderivative size = 780, normalized size of antiderivative = 4.08 \[ \int \frac {x}{a+b \cosh ^2(x)} \, dx=-\frac {b x \sqrt {\frac {a^{2} + a b}{b^{2}}} \log \left (\frac {{\left ({\left (2 \, a + b\right )} \cosh \left (x\right ) + {\left (2 \, a + b\right )} \sinh \left (x\right ) - 2 \, {\left (b \cosh \left (x\right ) + b \sinh \left (x\right )\right )} \sqrt {\frac {a^{2} + a b}{b^{2}}}\right )} \sqrt {-\frac {2 \, b \sqrt {\frac {a^{2} + a b}{b^{2}}} + 2 \, a + b}{b}} + b}{b}\right ) + b x \sqrt {\frac {a^{2} + a b}{b^{2}}} \log \left (-\frac {{\left ({\left (2 \, a + b\right )} \cosh \left (x\right ) + {\left (2 \, a + b\right )} \sinh \left (x\right ) - 2 \, {\left (b \cosh \left (x\right ) + b \sinh \left (x\right )\right )} \sqrt {\frac {a^{2} + a b}{b^{2}}}\right )} \sqrt {-\frac {2 \, b \sqrt {\frac {a^{2} + a b}{b^{2}}} + 2 \, a + b}{b}} - b}{b}\right ) - b x \sqrt {\frac {a^{2} + a b}{b^{2}}} \log \left (\frac {{\left ({\left (2 \, a + b\right )} \cosh \left (x\right ) + {\left (2 \, a + b\right )} \sinh \left (x\right ) + 2 \, {\left (b \cosh \left (x\right ) + b \sinh \left (x\right )\right )} \sqrt {\frac {a^{2} + a b}{b^{2}}}\right )} \sqrt {\frac {2 \, b \sqrt {\frac {a^{2} + a b}{b^{2}}} - 2 \, a - b}{b}} + b}{b}\right ) - b x \sqrt {\frac {a^{2} + a b}{b^{2}}} \log \left (-\frac {{\left ({\left (2 \, a + b\right )} \cosh \left (x\right ) + {\left (2 \, a + b\right )} \sinh \left (x\right ) + 2 \, {\left (b \cosh \left (x\right ) + b \sinh \left (x\right )\right )} \sqrt {\frac {a^{2} + a b}{b^{2}}}\right )} \sqrt {\frac {2 \, b \sqrt {\frac {a^{2} + a b}{b^{2}}} - 2 \, a - b}{b}} - b}{b}\right ) + b \sqrt {\frac {a^{2} + a b}{b^{2}}} {\rm Li}_2\left (-\frac {{\left ({\left (2 \, a + b\right )} \cosh \left (x\right ) + {\left (2 \, a + b\right )} \sinh \left (x\right ) - 2 \, {\left (b \cosh \left (x\right ) + b \sinh \left (x\right )\right )} \sqrt {\frac {a^{2} + a b}{b^{2}}}\right )} \sqrt {-\frac {2 \, b \sqrt {\frac {a^{2} + a b}{b^{2}}} + 2 \, a + b}{b}} + b}{b} + 1\right ) + b \sqrt {\frac {a^{2} + a b}{b^{2}}} {\rm Li}_2\left (\frac {{\left ({\left (2 \, a + b\right )} \cosh \left (x\right ) + {\left (2 \, a + b\right )} \sinh \left (x\right ) - 2 \, {\left (b \cosh \left (x\right ) + b \sinh \left (x\right )\right )} \sqrt {\frac {a^{2} + a b}{b^{2}}}\right )} \sqrt {-\frac {2 \, b \sqrt {\frac {a^{2} + a b}{b^{2}}} + 2 \, a + b}{b}} - b}{b} + 1\right ) - b \sqrt {\frac {a^{2} + a b}{b^{2}}} {\rm Li}_2\left (-\frac {{\left ({\left (2 \, a + b\right )} \cosh \left (x\right ) + {\left (2 \, a + b\right )} \sinh \left (x\right ) + 2 \, {\left (b \cosh \left (x\right ) + b \sinh \left (x\right )\right )} \sqrt {\frac {a^{2} + a b}{b^{2}}}\right )} \sqrt {\frac {2 \, b \sqrt {\frac {a^{2} + a b}{b^{2}}} - 2 \, a - b}{b}} + b}{b} + 1\right ) - b \sqrt {\frac {a^{2} + a b}{b^{2}}} {\rm Li}_2\left (\frac {{\left ({\left (2 \, a + b\right )} \cosh \left (x\right ) + {\left (2 \, a + b\right )} \sinh \left (x\right ) + 2 \, {\left (b \cosh \left (x\right ) + b \sinh \left (x\right )\right )} \sqrt {\frac {a^{2} + a b}{b^{2}}}\right )} \sqrt {\frac {2 \, b \sqrt {\frac {a^{2} + a b}{b^{2}}} - 2 \, a - b}{b}} - b}{b} + 1\right )}{2 \, {\left (a^{2} + a b\right )}} \]
-1/2*(b*x*sqrt((a^2 + a*b)/b^2)*log((((2*a + b)*cosh(x) + (2*a + b)*sinh(x ) - 2*(b*cosh(x) + b*sinh(x))*sqrt((a^2 + a*b)/b^2))*sqrt(-(2*b*sqrt((a^2 + a*b)/b^2) + 2*a + b)/b) + b)/b) + b*x*sqrt((a^2 + a*b)/b^2)*log(-(((2*a + b)*cosh(x) + (2*a + b)*sinh(x) - 2*(b*cosh(x) + b*sinh(x))*sqrt((a^2 + a *b)/b^2))*sqrt(-(2*b*sqrt((a^2 + a*b)/b^2) + 2*a + b)/b) - b)/b) - b*x*sqr t((a^2 + a*b)/b^2)*log((((2*a + b)*cosh(x) + (2*a + b)*sinh(x) + 2*(b*cosh (x) + b*sinh(x))*sqrt((a^2 + a*b)/b^2))*sqrt((2*b*sqrt((a^2 + a*b)/b^2) - 2*a - b)/b) + b)/b) - b*x*sqrt((a^2 + a*b)/b^2)*log(-(((2*a + b)*cosh(x) + (2*a + b)*sinh(x) + 2*(b*cosh(x) + b*sinh(x))*sqrt((a^2 + a*b)/b^2))*sqrt ((2*b*sqrt((a^2 + a*b)/b^2) - 2*a - b)/b) - b)/b) + b*sqrt((a^2 + a*b)/b^2 )*dilog(-(((2*a + b)*cosh(x) + (2*a + b)*sinh(x) - 2*(b*cosh(x) + b*sinh(x ))*sqrt((a^2 + a*b)/b^2))*sqrt(-(2*b*sqrt((a^2 + a*b)/b^2) + 2*a + b)/b) + b)/b + 1) + b*sqrt((a^2 + a*b)/b^2)*dilog((((2*a + b)*cosh(x) + (2*a + b) *sinh(x) - 2*(b*cosh(x) + b*sinh(x))*sqrt((a^2 + a*b)/b^2))*sqrt(-(2*b*sqr t((a^2 + a*b)/b^2) + 2*a + b)/b) - b)/b + 1) - b*sqrt((a^2 + a*b)/b^2)*dil og(-(((2*a + b)*cosh(x) + (2*a + b)*sinh(x) + 2*(b*cosh(x) + b*sinh(x))*sq rt((a^2 + a*b)/b^2))*sqrt((2*b*sqrt((a^2 + a*b)/b^2) - 2*a - b)/b) + b)/b + 1) - b*sqrt((a^2 + a*b)/b^2)*dilog((((2*a + b)*cosh(x) + (2*a + b)*sinh( x) + 2*(b*cosh(x) + b*sinh(x))*sqrt((a^2 + a*b)/b^2))*sqrt((2*b*sqrt((a^2 + a*b)/b^2) - 2*a - b)/b) - b)/b + 1))/(a^2 + a*b)
\[ \int \frac {x}{a+b \cosh ^2(x)} \, dx=\int \frac {x}{a + b \cosh ^{2}{\left (x \right )}}\, dx \]
\[ \int \frac {x}{a+b \cosh ^2(x)} \, dx=\int { \frac {x}{b \cosh \left (x\right )^{2} + a} \,d x } \]
\[ \int \frac {x}{a+b \cosh ^2(x)} \, dx=\int { \frac {x}{b \cosh \left (x\right )^{2} + a} \,d x } \]
Timed out. \[ \int \frac {x}{a+b \cosh ^2(x)} \, dx=\int \frac {x}{b\,{\mathrm {cosh}\left (x\right )}^2+a} \,d x \]