Complex sentence: In about 1845 several of his poems were published by "Otechestvennye Zapiski", then in "Repertuar and Pantheon" appeared a number of short, unremarkable articles of different y genres: verses, critical articles, theatrical reviews, and translations.
Split into simpler sentences: In about 1845 several of his poems were published by "Otechestvennye Zapiski". Then, a number of short, unremarkable articles of different genres appeared in "Repertuar and Pantheon": verses, critical articles, theatrical reviews, and translations.