<|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 [2, 5, 6, 15], create an equation that reaches the target of 25. Each number can only be used once. Show your work in <think> </think> tags. Return the final equation and your solution in <answer> </answer> tags, for example, <answer> 15 + 10 = 25 </answer>.<|im_end|>
<|im_start|>assistant
Let me solve this step by step.
<think>