33.8. 1)(x + 1): - 4x = 5 + x²(x + 3); 2)(1 - y): + 8y = 7 + yº(3 - y);
3) (x + 1)2 + (x - 1)3 - 2x3 = 12;
4) (1 + y) + (1 - y)3 – 6y2 = 3y - 1.
33.9. 1) (2 + x)3 - x2(6 + x) = 11x + 19;
2) (2-2)- 2²(2 - 6) = 132 – 7;
3) (y + 3)3 - 2y - 30 = yº(9+y);
4) (3 - t) + 3t + 21 = -t?(t – 9).