80-65+30:5*4

Let's break down the expression step by step:

80 - 65 + 30 ÷ 5 × 4

First, perform the division and multiplication from left to right:

80 - 65 + 6 × 4

Then, perform the multiplication:

80 - 65 + 24

Finally, perform the subtraction:

15 + 24 = 39

Therefore, the result of the expression 80 - 65 + 30 ÷ 5 × 4 is 39.