<|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 [9, 8, 6, 1], create an equation that equals 25. Use basic arithmetic operations (+, -, *, /) but ensure all numbers are used exactly once without repetition. Focus on logical steps and list your intermediate results in systematic order. Show your work in <think> </think> tags. And return the final equation and answer in <answer> </answer> tags, for example <answer> (6+1)*(3-1) = 25 </answer>.<|im_end|>
<|im_start|>assistant
Let me solve this step by step.
<think>