Complex sentence: FareSavers are sold in books of ten and can be validated at a SkyTrain station by inserting it into the validator or on a bus, by inserting the ticket into the electronic farebox.
Split into simpler sentences: FareSavers are sold in books of ten and can be validated at a SkyTrain station by inserting it into the validator. On a bus, by inserting the ticket into the electronic farebox.