Problem: Find a uniformly valid leading order approximation to the solution of $\epsilon y'' + (1+x^2)y' - y = 0$ with boundary conditions $y(1) = 1; y(-1) = 1$ in the limit $\epsilon \to 0^+$. Use only the variables and constants given in the problem; do not define additional constants. Place your final solution in a $\boxed{}$ LaTeX environment.
Solution: $\boxed{y(x,\epsilon) \approx \exp\left(\tan^{-1}(x) - \frac{\pi}{4}\right) + \left(1 - e^{-\pi/2}\right) e^{- 2(x+1)/ \epsilon}}$