Réponse:
4n +(3n+1)
=4n+3n+1
=7n+1
17-2×(-5-x)
=17+10+2x
=27+2x
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+16+3
=40x+19
