Question

Let a represent Zog's age now.

9 times the sum of Zog's age in 4 years​

Answer 1

9*(a+4)

Explanation:

a = Zog's current age

"9 times the sum of Zog's age in 4 years​" isn't clear. Sum of what?

We'll ignore the words "the sum of."

9 times Zog's age in 4 years​

can be written as 9*(a+4)