But there is little dispute that it is a costly, complicated undertaking.

There was a look on his face appropriate to a man making slow progress through a complicated undertaking.

"It's been an extremely complicated undertaking, and there are many issues that haven't been settled yet."

Of course, this has proven to be a complicated undertaking.

It's been discussed and looked at, but it is a complicated undertaking.

Taking personal histories and asking questions is a complicated undertaking given the number of languages spoken by the recent immigrants.

It has been a long and complicated undertaking.

The Newberry musicians made their reconstruction look easy, but it was a complicated undertaking.

But things have changed, and these days writing a book is a far more complicated undertaking.

The inventors of the Sabbath understood that it was a much more complicated undertaking.