2) 2x(3x - 7) - 33(2x + 1); 3) (a - 26)2 + (a + 2b)2; 4) (7x - 4m)(7x + 4m) - (7x - 4m)2; 5) (x - 1)(x2 + x + 1) + (x - 1)(x2 - 1); 6) (x + 2)(x2 - 2x + 4) - (x - 1)(x2 + 2). Помогите Пд​