<|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
Challenge yourself to solve this Countdown puzzle: Using the numbers [15, 105, 25, 8], create a mathematical expression that results in 58. Only use each number once and utilize the operations +, -, *, / in your solution. Write down your reasoning in <think> </think> tags as you go. Finally, provide your final equation and the answer in <answer> </answer> tags. Your task is to think creatively with numbers and operations to arrive at the solution. Good luck!<|im_end|>
<|im_start|>assistant
Let me solve this step by step.
<think>