Question

a(a-1)(a+1)-(a-2)(a^2+2a+4)=

Answer 1

$a(a - 1)(a + 1) - (a - 2)(a {}^{2} + 2a + 4) = a(a {}^{2} - 1) - (a {}^{3} - 8) = a {}^{3} - a - a {}^{3} + 8 = 8 - a$

Answer 2

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Готово!!Удачи:))))

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