56360000:800-100*(9356+396924) :7000

To solve the expression \( 56360000:800-100*(9356+396924) :7000 \), we will follow the order of operations (parentheses, exponents, multiplication and division from left to right, addition and subtraction from left to right).

Let's break it down step by step:

1. Calculate inside the parentheses: \[ 9356 + 396924 = 406280 \]

2. Substitute back into the expression: \[ 56360000:800 - 100 * 406280 :7000 \]

3. Now, interpret the notation. The colon ":" is used here like a division sign. So, we represent the expression using standard notation: \[ 56360000 \div 800 - 100 \times 406280 \div 7000 \]

4. Calculate each part:

   • First, calculate \( 56360000 \div 800 \): \[ 56360000 \div 800 = 70450 \]
   • Next, calculate \( 100 \times 406280 \): \[ 100 \times 406280 = 40628000 \]
   • Now calculate \( 40628000 \div 7000 \): \[ 40628000 \div 7000 = 5804 \]

5. Now, substitute these results back: \[ 70450 - 5804 \]

6. Finally, perform the subtraction: \[ 70450 - 5804 = 64646 \]

Therefore, the final answer is: \[ 64646 \]