A = (5 x + 1) (3 x - 7 x - 4) = (5 x + 1) (- 4 x - 4)
B = (7 - x) (x - 4 + x + 3) = (7 - x) (2 x - 1)
C = (2 x + 3) (5 x - 1 - x) = (2 x + 3) (4 x - 1)
D = (4 x - 5) (x -3 - 3 x + 1) = (4 x - 5) (- 2 x - 2)
2/11 + 15 + 9/11 = 2/11 + 165/11 + 9/11 = 176/11 = 16
Ответ: 16
(56-56):342+(289-288)*122=0:342+1*122=1*122=122