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Answer :

Top and bottom:
x + 11 = 3x - 3
x + 3x = 4x
11 - 3 = 8
Top and bottom is 4x + 8

Left and right side:
2x - 4

Area:
4x + 8(2x - 4)
4x(2x) = 8x^2
8-4=4
8x^2 + 4 = area

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