Complex sentence: He published his first poem in 1820, published an ambitious narrative poem entitled "Eloa" in 1824 on the popular romantic theme of the redemption of Satan, and collected his recent works in January 1826 in "Poèmes antiques et modernes".
Split into simpler sentences: He published his first poem in 1820, published an ambitious narrative poem entitled "Eloa" in 1824 on the popular romantic theme of the redemption of Satan. He collected his recent works in January 1826 in "Poèmes antiques et modernes".