Those familiar with Only Connect will know how this works. but a quick explanation will not go amiss.
You will see three phrases, one at a time. The first two are below, and the third will be revealed in an hour. You have to work out the fourth phrase. Obviously, the more that you see, the easier it should be.
The first two are:
(3 x 96 + 80) x 6
2 x 50 x 6