If you are in Standard View and look at Audio>Files, you could sort by Name (click on column header to sort). That would put all the same cuts together. You can then compare track duration, bitrate, file type. Note if these fields are not already showing, right click on the header and add them from the drop down list.
Do you want to delete them (select file>right click>delete), or just not show the duplicates? You could have the same track in different formats (mp3, flac, etc.) or they could be from different albums, or totally different songs just having the same name.
There is also a built in "Smartlist" to find duplicates. On the left side Menu >Playlists>Smartlist>Find Duplicates.
What do you want to do with the duplicates?