Using the numbers [9, 55, 33, 10], create an equation that equals 99. You can use basic arithmetic operations (+, -, *, /) and each number can only be used once. Show your work in <think> </think> tags.  
    And return the final equation and answer in <answer> </answer> tags, for example <answer> (55 - 10) * 2 = 100 </answer>. Additionally, reflect on the equations and numbers used in your solution, and try to think of what could have been done differently if attacking the same problem with a different goal number.