To solve this expression, we need to follow the order of operations: parentheses, exponents, multiplication and division (from left to right), and addition and subtraction (from left to right). Let's break it down step by step. First, we have 72 ÷ 4, which equals 18. Then, we have 18 × 9, which equals 162. Next, we have 85 - 162 + 63. Adding and subtracting from left to right, we get -77. So, the value of the expression is -77.