1 / | | x | -- dx | x | E | / 0
Integral(x/E^x, (x, 0, 1))
/ | | x -x | -- dx = C + (-1 - x)*e | x | E | /
-1 1 - 2*e
=
1 - 2*exp(-1)
0.264241117657115
Use the examples entering the upper and lower limits of integration.