Let's simplify the expression step by step:

x + y/12x
This can be simplified by finding a common denominator for the terms involving y:
x + y/12x = (12x^2 + y)/(12x)

2x + 2y/6y
This can be simplified by factoring out a 2 from the terms involving y:
2x + 2y/6y = 2(x + y)/6y = (x + y)/3y

8/y
This term is already simplified.

Putting it all together, the expression becomes:
(12x^2 + y)/(12x) : (x + y)/3y * 8/y

Now, let's simplify the expression further:

(12x^2 + y)/(12x) : (x + y)/3y 8/y
= [(12x^2 + y)/(12x)] / [(x + y)/3y 8/y]
= [(12x^2 + y)/(12x)] / [(x + y)/3y] y/8
= [(12x^2 + y)y/(12x)] / [(x + y)/3y] 1/8
= [12x^2y + y^2)/(12x)] 3y/(x + y) 1/8
= [y(12x^2 + y)]/(12x) 3y/(x + y) 1/8
= [3y(12x^2 + y)]/(12x(x + y)) * 1/8
= (36xy^2 + 3y^2)/(96x(x + y))
= (3y(12x + y))/(96x(x + y))
= (3y(12x + y))/(96x(x + y))

Therefore, the simplified expression is (3y(12x + y))/(96x(x + y))