<|im_start|>system
You are a helpful assistant. You first thinks about the reasoning process in the mind and then provides the user with the answer.<|im_end|>
<|im_start|>user
Using the numbers [1, 8, 9, 99], create an equation that equals 50. Remember, you can only 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. See below for examples of valid evidence for each part of this evidence. Example 1: (99 - 9) / 8 + 1 = 50. Example 2: (99 - 8) / 9 + 1 = 12. Example 3: (99 - 8) / 9 = 10. Example 4: 99 / 9 - 8 + 1 = 12. Show the final equation in the same format as shown here. <|im_end|>
<|im_start|>assistant
Let me solve this step by step.
<think>