Answer:
6x+16y+8
Explanation:
In order to solve this problem, 
6(x+2y)+3+4y+5
We would first need to expand the brackets 
6x + 12y + 3 + 4y + 5
Collect like terms together. 
6x+12y+4y+3+5
Add the like terms 
6x+16y+8
Therefore, the expression which is equivalent to 6(x+2y)+3+4y+5 is 6x+16y+8