Ответ (Неопределённый)
[src]$${{16\,\left(\int {{{x^2\,\left(\log \left(x^2+1\right)\right)^2
}\over{16\,x^2+16}}}{\;dx}+\int {{{\left(\log \left(x^2+1\right)
\right)^2}\over{16\,x^2+16}}}{\;dx}+4\,\int {{{x^2\,\log \left(x^2+1
\right)}\over{16\,x^2+16}}}{\;dx}+12\,\int {{{x^2\,\arctan ^2x
}\over{16\,x^2+16}}}{\;dx}-8\,\int {{{x\,\arctan x}\over{16\,x^2+16
}}}{\;dx}+{{\arctan ^3x}\over{4}}\right)-x\,\left(\log \left(x^2+1
\right)\right)^2+4\,x\,\arctan ^2x}\over{16}}$$