Hello!
Answer:
1. first u want to distribute the 3
3(n+4)+2
3n+12+2
Then add 12 and 2
3n+14
2. again, distribute
5(w+2)+3w-4
5w+10+3w-4
subtract
5w+10-4+3w-4-4
combine like terms
5w+3w+6+3w+3w
8w+6
3. distribute
3(w-2y)+w+4
3w-6y+w+4
Combine like terms
4w-6y+4
these are the first 3. if this is not what you wanted pls reach out! Hop this helps! :)