Complex sentence: Knowles took a hiatus from music in 2010, took over management of her career and expanded her musical repertoire into exploring 1970s R&B, rock and roll and African and funk styles: her fourth album "4" deviated towards a more traditional R&B sound.
Split into simpler sentences: Knowles took a hiatus from music in 2010, took over management of her career and expanded her musical repertoire into exploring 1970s R&B, rock and roll and African and funk styles. As a result, her fourth album "4" (2011) deviated towards a more traditional R&B sound.