Ответ:

717b - 84b + 88c = 633b + 88c

633 * 2 + 88 * 5 = 1266 + 440 = 1706

(d + c) * 25 + 34d = 25d + 25c + 34d = 39d + 25c

39 * 7 + 25 * 5 = 398

564b + (a - b) * 26 = 564b + 26a - 26b = 538b + 26a

538 * 2 + 26 * 6 = 1232

(d + c) * 34 - 42d = 34d + 34c - 42d = -8d + 34c

-8 * 7 + 34 * 5 = 114