Complex sentence: Antoine Mahaut (c.1720-1785) was a flautist, composer, editor, and spent his early composing career in Amsterdam and Mannheim, and his middle to late career in France.
Split into simpler sentences: Antoine Mahaut (c.1720--1785) was a flautist, composer, and editor. He spent his early composing career in Amsterdam and Mannheim, and his middle to late career in France.