39+18:2-40+38+53=

To solve this, we need to follow the order of operations (PEMDAS/BODMAS): Parentheses/Brackets, Exponents/Orders, Multiplication and Division (from left to right), Addition and Subtraction (from left to right).

1. First, perform the division:

   \[ 18 \div 2 = 9 \]

2. Now, substitute this value back into the expression:

   \[ 39 + 9 - 40 + 38 + 53 \]

3. Next, perform the additions and subtractions from left to right:

   \[ 39 + 9 = 48 \]

   \[ 48 - 40 = 8 \]

   \[ 8 + 38 = 46 \]

   \[ 46 + 53 = 99 \]

Ответ: 99