(x+2)² - x²+4x+4, (x-2)² - x²-4x+4, (3+a)(3-a) - 9-a², (2m+n)² - 4m²+4mn+n², (4m+1)(4m-1) - 16m²-1, (3+b)² - 9+6b+b², (x+y)³ - x³+3x²y+3xy²+y³, (x-y)³ - x³-3x²y+3xy²-y³, (b+4)² - b²+8b+16, (5-b)(5+b) - 25-b², (a+2)³ - a³+6a²+12a+4, (m-3)³ - m³-9m²+27m-27, (m+3)² - m²+6m+9, (m+6)(m-6) - m²-36, (2+a)³ - 8+12a+6a²+a³,

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