I hope this picture helps. I'll elaborate if needed!
Answer:
3x+2x=5x but 4 can't add to 3x and 2x
You can set this up as 5(3+4)....then, distribute by multiplying the terms in parentheses by 5. This gives you 15+20, which equals 35.
6(4)^2 + 2
= 6(16) + 2
= 96 + 2
= 98