3 807 * 98+ (550701-82989): 64 =

Let's calculate the expression step by step:

First, we calculate the multiplication:

$$3807 \cdot 98 = 373086$$

Next, we calculate the expression inside the parentheses:

$$550701 - 82989 = 467712$$

Now, we divide the result by 64:

$$467712 : 64 = 7308$$

Finally, we add the results:

$$373086 + 7308 = 380394$$