Have they ever shown the episodes both with and without the laugh track?Just curious,because I have seen the episodes with Col.Potter with and without the laugh track.

no

If you are referring to the DVD presentations then no they haven't aired on TV that way. If there is an episode with Col Potter without a laugh track that you have seen on TV it is because that is the way it originally aired on the network to my knowledge. Then again it has been many many years since I watched MASH in syndication since I have the DVDs.