Parallelograms. Rectangles. Trapezoids.
For this case we will complete the table part by part.
We have then:
First row:
Snake = Rabbit = 4
Rabbit = Not Snake = 18
Total = 4 + 18 = 22
Second row:
Not rabbit = Snake = 11
Not rabbit = Not Snake = 26
Total = 11 + 26 = 37
Third row:
Total = 4 + 11 = 15
Total = 18 + 26 = 44
Total = 59
What the composite function in the question is actually trying to explain is;
First of all, in the function 
, we will find a result by writing 
where we see the letter 
.
We will write this result in the 
function where we see the letter and we will get the result.
If you subtract 3-7 and add 9 to it the result is 5. 3-7+9=5
