Specialized prostheses (replacements) and orthoses (braces) for competitive disabled athletes who run, ski, and cycle can be more complex.

FORBES: Design A New Foot If The Shoe Does Not Fit -- Laser Sintering a Prosthetic Leg

Changing the figure to take account of the cycle would make more sense, but it would introduce a complex and disputable new calculation, with countries arguing endlessly over precisely where they were in the cycle.

ECONOMIST: Europe's fiscal follies

The immensely complicated astronomical clock built by Richard of Wallingford, abbot of St Albans, was so complex it took eight years to run through its full cycle of calculations and was the most intricate machine ever built up to that point.

FORBES: What Are Examples of Things in the "Common Knowledge" about History That Historians Almost Universally Consider Incorrect?