Verified answer

Bonjour,

4n + (3n + 1)

= 4n + 3n + 1

= 7n + 1

17 - 2 * (- 5 - x)

= 17 + 10 + 2x

= 2x + 27

13k - (2k + 4) * 10

= 13k - 20k + 40

= - 7k + 40

8m + 4 + (- 2m - 5)

= 8m + 4 - 2m - 5

= 6m - 1

(- 2t + 1) - t

= - 2t + 1 - t

= - 3t + 1

8 (5x + 2) + 3

= 40x + 2 + 3

= 40x + 5.