Упростите выражение:
а) $(2x - 2a)(3a^2 - 4a + 5)$;
б) $(7x^2 - 2x + 4 - x^2)(2x - x - 1)$;
в) $(x^2 + 3x - 2)(2x^2 - x + 4)$;
г) $(2m^3 - 7m^2 + 4m)(3 - 8m + m^2)$;
д) (2a + 1)(3 + a)(5a + 2);
е) (x − 3)(2x − 1)(7 + 2x);
ж) (2m − n)(3n + 2m)(m − 5n);
з) (p − 8q)(4q − p)(p + 8q).
$(2x - 2a)(3a^2 - 4a + 5) = 6a^2x - 6a^3 - 8ax + 8a^2 + 10x - 10a$
$(7x^2 - 2x + 4 - x^2)(2x - x - 1) = (6x^2 - 2x + 4)(x - 1) = (6x^2 - 2x + 4)(x - 1) = 6x^3 - 8x^2 + 6x - 4$
$(x^2 + 3x - 2)(2x^2 - x + 4) = 2x^4 + 6x^3 - 4x^2 - x^3 - 3x^2 + 2x + 4x^2 + 12x - 8 = 2x^4 + 5x^3 - 3x^2 + 14x - 8$
$(2m^3 - 7m^2 + 4m)(3 - 8m + m^2) = 6m^3 - 21m^2 + 12m - 16m^4 + 56m^3 - 32m^2 + 2m^5 - 7m^4 + 4m^3 = 2m^5 - 23m^4 + 66m^3 - 53m^2 + 12m$
$(2a + 1)(3 + a)(5a + 2) = (6a + 3 + 2a^2 + a)(5a + 2) = 30a^2 + 15a + 10a^3 + 5a^2 + 12a + 6 + 4a^2 + 2a = 10a^3 + 39a^2 + 29a + 6$
$(x - 3)(2x - 1)(7 + 2x) = (2x^2 - 6x - x + 3)(7 + 2x) = 14x^2 - 42x - 7x + 21 + 4x^3 - 12x^2 - 2x^2 + 6x = 4x^3 - 43x + 21$
$(2m - n)(3n + 2m)(m - 5n) = (6mn - 3n^2 + 4m^2 - 2mn)(m - 5n) = 6m^2n - 3mn^2 + 4m^3 - 2m^2n - 30mn^2 + 15n^3 - 20m^2n + 10mn^2 = 4m^3 - 16m^2n - 23mn^2 + 15n^3$
$(p - 8q)(4q - p)(p + 8q) = (4pq - 32q^2 - p^2 + 8pq)(p + 8q) = 4p^2q - 32pq^2 - p^3 + 8p^2q + 32pq^2 - 256q^3 - 8p^2q + 64pq^2 = 4p^2q + 64pq^2 - p^3 - 256q^3$
Пожауйста, оцените решение