Após desenvolver os produtos notáveis, reduza os termos semelhantes.
a) ( x + 1 )² + ( x + 1 )²
b) ( 2y + 5 )² - ( y + 3 )² - 2 ( 6y + 7 )
c) ( 3 + y )² - ( y + 3 )²
d) ( x + 4 )² + ( x - 4 )²
e) ( x - 1 )² - ( x + 1 )²
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