306•24:72-(35280:7-63•80):97

Let's break down the expression step by step to solve it.

The expression is:

\[ 306 \cdot 24 : 72 - (35280 : 7 - 63 \cdot 80) : 97 \]

1. First, we can convert the division and multiplication into fractions as needed and handle them step by step.

Step 1: Solve the first part

\( 306 \cdot 24 \) and then divide by 72:

\[ 306 \cdot 24 = 7344 \]

Now, divide by 72:

\[ 7344 : 72 = \frac{7344}{72} = 102 \]

Step 2: Solve the second part inside the parentheses

First, we need to solve \( 35280 : 7 \):

\[ 35280 : 7 = \frac{35280}{7} = 5040 \]

Next, calculate \( 63 \cdot 80 \):

\[ 63 \cdot 80 = 5040 \]

Now, take these two results and perform the subtraction:

\[ 5040 - 5040 = 0 \]

Step 3: Result from the parentheses

Now we have:

\[ (0) : 97 = 0 \]

Step 4: Finally combine both parts

Now we can put everything together.

\[ 102 - 0 = 102 \]

The final result for the entire expression is:

\[ \boxed{102} \]