Here are the results for the given operations:

(a) $4879279 + 1423 - 47 = 4880655$

(b) $982447982 + 2478 - 789 = 982449671$

(c) $781149558 + 999 - 14 = 781150543$

(d) $7843982 - 12795 + 28 = 7831215$

(e) $56179004 - 14365 + 478 = 56165117$

(f) $247960 - 7498 + 4789 = 245251$

Would you like more details or have any other questions?

Here are some related questions for practice:

1. What is $9999999 + 12345 - 9876$?
2. Calculate $457839 - 23478 + 89456$.
3. Solve $123456789 + 87654321 - 1234$.
4. What is $123456 - 7890 + 123$?
5. Solve $987654321 + 123456789 - 98765$.

Tip: Double-check subtraction steps to ensure accuracy in mixed operations.