Answer: "Three times the sum of 8 and 4":

Step-by-step explanation:
In the question we have asked that what will be the mathematical expression for the " three times the sum of 8 and 4".
We have asked with 'Three times the sum of 8 and 4' which means that adding the sum of number '8' and number '4' by three times.
We can write 'Three times the sum' mathematically as '3
'.
We can write 'sum of 8 and 4' mathematically as '

So the final expression comes out to be:
