You should upload it on the internet then use the img tags for the URL of the image. Or you can just attach it here.
to avoid confusion, i changed u to x
try integration by parts. let and . (i hope you remember what and mean)
if you are really lazy, you can do a search for this question. it has been derived several times on this forum and many times on the internet, i'm sure, using both integration by parts and complex analysis