```regex (\([^\(\)]*\))|(\([^\(\)]*\([^\(\)]*\)[^\(\)]*\))|(\([^\(\)]*\([^\(\)]*\([^\(\)]*\)[^\(\)]*\)[^\(\)]*\))|(\([^\(\)]*\([^\(\)]*\([^\(\)]*\([^\(\)]*\)[^\(\)]*\)[^\(\)]*\)[^\(\)]*\)) ```