Restored MacBook without some apps

So I got my MacBook Pro (Retina Display, 13-inch) in early 2015, meaning that it should come with the iWork suite of apps, which are Pages, Keynote and Numbers. Recently, I was tried to deleting some files, but somehow they could not be deleted. So I decided to delete the startup disk and was completely unaware of what I was doing. I then restored the MacBook disk drive from online, but the iWork apps did not appear in my Launchpad. What do I do?