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1. Difference of Squares in Construction:
A construction company is tasked with demolishing an old square building with a side length of 20 meters and building a new square building with a side length of 22 meters. How much larger is the area of the new building compared to the old one?

2. Binomial Expansion in Product Design:
A rectangular frame has dimensions of 15 cm by 10 cm. If each dimension is increased by a cm, find the expression for the area of the new frame in terms of a.

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