"What is it now?" thought Mike as he got up to open the door, which sounded as though it was being hit repeatedly by a large hammer.
"FedEx delivery," grunted the tall figure in a motorcycle helmet. "Sign here please!"
Mike took the package into the house. After spending several minutes looking for scissors and a sharp knife to get into the overly secure package and feeling a little bit out of breath, he sat looking at a short list of typed words. "What is she up to now?", he said.
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If x = 9, y = 8 and z = 2, what is x + y - z?