Dimitri has a pool surrounded by concrete in his backyard. The dimensions of his backyard are 12x+2 units by 14x-2 units. The di
mensions of his pool are 5x-3 units by 2x units. If he wanted to put Astroturf in place of the concrete, what area does the concrete take up? If he wants to put a fence around the entire backyard, how many units of fencing would he need?
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