Complicated is not the same as complex.
*Complicated* means something has a lot of parts, as in, "I broke open my grandfather's watch and now I see how complicated that thing is."
*Complex* means difficult to understand, as in, "Einstein's relativity is described by a simple equation, the sort of thing you learn to deal with in junior high math -- but the application of relativity is complex."
The distinction between complex and complicated is **simple**, eh? How ironic!!