Answer:
The given expression is

Notice that the main operation is a quotient. So, we must begin with that.
Now, the quotient is between a difference at the numerator and a number at the denominator.
Then, notice that the difference is between the triple of a number and 8 times another number.
So, the full statement would be
"A quotient between the difference of the triple of a number and 8 times another number, and 13".
Another way would be
"The triple of a number subtracted by 8 times another number, all divided by 13".