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2(a²) + 2(-2a) + 2(1) + a(a²) + a(-2a) + a(1)
2a² - 4a + 2 + a³ - 2a² - a
a³ + 2a² - 2a² - 4a - a + 2
a³ - 3a + 2
= 2a²-4a+2 + a³-2a²+a
= a³-3a+2