I believe that 29 was done by Haduki Kaoru, but I cannot find that cover (maybe an alternate printing or something?)
Sorry, I guess I should give that information out. 1 is Chrome Chrome Otome by Meme50.
4 is from Sensual Scent, Provactive Legs (not sure of the Japanese name) by Bakunyu Fullnerson This woman is also featured in the first story of the manga.