Q: Specific items from a backup

My mom had over 5500 photos on her 16 GB iPhone 6, which was obviously causing some issues.  The only way I could figure out to get those pictures deleted for real was to restore her phone(there were too many to go into the recently deleted album and select delete all).  I didn't want to restore from the backup of her phone because I didn't want to restore all of those pictures.  The only thing she's annoyed with me over is the loss of her notes.  Are they gone forever or is there a way to get those back if I backed up to iCloud before restoring?