(342:18+81·11):35-5

First, let's simplify the expression:

(342:18+81·11):35-5

Starting with the multiplication, we have:

81·11 = 891

Next, we have to perform the division:

342:18 = 19

Now we can substitute these values back into the expression:

(19+891):35-5

Next, we have to perform the addition:

19+891 = 910

Substituting this value back into the expression:

(910):35-5

Finally, we perform the division:

910:35 = 26

Substituting this value back into the expression:

26-5 = 21

So, the simplified expression is 21.