I think it is a glide reflection.
Answer:
81
Step-by-step explanation:
Add all of the together to find how much they all equal. 27x3 = 81
Given:
The expression is
.
To find:
The position of parentheses inserted in the expression to get the value 19
Step-by-step explanation:
We have,

Now,




There are more ways to apply the parenthesis, but we do not get 19.



And many more possibilities.
Therefore, the expression after inserting the parentheses is
.