To share an item using AirDrop, tap Share or , then tap the name of the person you want to share with in the AirDrop panel. They’ll need to turn on AirDrop, and you must be within approximately 30 feet of the other iOS 7 device.
To print a single photo to an AirPrint enabled printer, tap , then tap Print. To print multiple photos while viewing a photo album, tap Select, and tap to select the photos you want to print. Tap , then tap Print. More: AirPrint Basics
To share to Twitter, Facebook, Flickr, or Vimeo directly from the Photos app, sign in to your account in Settings. Then, just tap in Photos or any other app that supports sharing photos and videos.