Improper integral

[cutterjohn]

This made me curious, so I dug out the FX-CP400 which spat out:
((-5*(-1)^(4/5))/4) + 20
which converting to decimal result:
21.01127124-0.7347315654i

[EDIT]
classpad was in complex mode.

...also realized that the screen on the cp400 just doesn't seem to be very good, which in addition to getting the prime about the same time may help explain why I've avoided using it much... that and it's interface is clunky as hell... and it's comparatively slow...
[/EDIT]