\[ y'(x) \left (\frac {\text {e1} (a+x)}{\left ((a+x)^2+y(x)^2\right )^{3/2}}+\frac {\text {e2} (x-a)}{\left ((x-a)^2+y(x)^2\right )^{3/2}}\right )-y(x) \left (\frac {\text {e1}}{\left ((a+x)^2+y(x)^2\right )^{3/2}}+\frac {\text {e2}}{\left ((x-a)^2+y(x)^2\right )^{3/2}}\right )=0 \] ✗ Mathematica : cpu = 299.997 (sec), leaf count = 0 , timed out
$Aborted
✗ Maple : cpu = 0. (sec), leaf count = 0 , exception
time expired