Answer:
4b+6d+5y+7
Explanation:
(You will have to eliminate redundant parentheses.)
(5y+8)+(6d-2)+(4b+1)
5y+8+6d-2+4b+1
(Now you will add the numbers.)
5y+8+6d-2+4b+1
5y+7+6d+4b
(Now you will have to rearrange terms.)
5y+7+6d+4b
4b+6d+5y+7
(And your solution is 4b+6d+5y+7)
I hope this helps. :)