Go around in circles to complete a square wheel

The trick here is to spot that the original equation can also be written in modified form as 49² - 47² = 26² - 22². This relationship will hold true all around the wheel, so we need to find four other subsidiary equations in the form of A² - B² = 192.

If we look to the left of the 49, and to the right of the 47, we see that 14² - 2² is the only possibility. Working around the circle in this way, the complete wheel is discovered.