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33.18. Найдите наименьшее целое число, являющееся решением не-
равенства: :
1) (х – 7)3 + 42х2 = (х + 7)3 + 14 – 7x;
2) (6 + х) 3 – 220x < 2x3 = (х – 6)3 + 19.
33.19. Докажите тождество:
1) (b + 5) 3 — bb — 5)2 – 25(1 + b)2 = 100;
2) 5(1 – b)3 + 5b(1 + b)2 – (1 – 5b)2 = 4;
3) (2b – 3) 3 — 4Ы?(2b – 6) + 6b(26 – 9) = -27;
4) (b + 2)3 + (2b + 1) 3 — 9ь(b2 + 2b + 2) - 10 = -1.​

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