Let's solve the calculations step by step.

For the first expression:

1. \( 1435 + 213 = 1648 \)
2. \( 1648 - 13 = 1635 \)

So, the result of the first expression is **1635**.

Now for the second expression:

1. \( 347 + 418 = 765 \)
2. \( 765 + 123 = 888 \)
3. \( 888 + 12 = 900 \)

So, the result of the second expression is **900**.

### Final Answers:
- \( (1435 + 213) - 13 = 1635 \)
- \( 347 + 418 + 123 + 12 = 900 \)