OK, I am doing everyone a favor who only wants to hear just the “prog” songs Kansas did. I have made a list by album (Only Original Lineup) which songs would fit as the definition of “prog” I have seen here:
Album Songs
Kansas: Belexis, Journey To MariaBronn, Aprecu, Death of Mother Nature Suite
Song For America: Title Track, Lamplight Symphony, Imcamudro-Hymn to the Atman
Masque: Mysteries and Mayhem, The Pinnacle, All the World, Icarus
LeftOverature: Miracles Out of Nowhere, Opus Insert, Cheyenne Anthem, Magnus Opus
Point of Know Return: Closet Chronicles, Nobodys Home, Helplessly Human
Monolith: On the Other Side, Away from you, Angels have Fallen, Glimpse of Home
Audio Visions: No One Together, Curtain of Iron
Somewhere to Elsewhere: Icarus II, Myriad, Distant Vision
If all you are looking for is this format this list should help you but I think you are missing out on so much more theat these guys have to offer.