Complex sentence: He studied the Old Testament, the text and commentaries of the Talmud, the Mishna and Gemara, also delving into the intricacies of Biblical exegesis and the Targum.
Split into simpler sentences: He studied the Old Testament, as well as the text and commentaries of the Talmud, the Mishna and Gemara. Furthermore, he delved into the intricacies of Biblical exegesis and the Targum.