But the Mayor said he could not settle the lawsuit because of complex legal reasons.

For complex reasons she didn't care to deal with just right now.

Officials cite more complex reasons for the low rates of testing.

The more complex reason, however, for this method of writing is that I just can't stand routine.

Could computer analysis of a tool and the hand which held it ever provide the complex reasons why a society assumed its form?

Or, perhaps, there was some more complex reason for concealing their identities.

Her nature and singular ability to find trouble dictated a more complex reason.

For annoying reasons too complex to go into, you cannot take a round trip to both islands.

There were complex reasons behind the shift in each individual's creative potential.

The Arabs "lost" their gulf for reasons too complex to go into here.