Complex sentence: She has started her stage music activity in 1999 in "N&D music band" with Nicolae Marin and had released 4 albums, and after the split off in 2003 she had released another two solo albums.
Split into simpler sentences: She has started her stage music activity in 1999 in "N&D" music band with Nicolae Marin and had released 4 albums. After the split off in 2003 she had released another two solo albums.