<|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 [18, 99, 37, 70], create an equation that equals 69. You are allowed to use basic arithmetic operations (+, -, *, /) and each number can only be used once. Present a detailed solution showing your work in <think> </think> tags. Lastly, return your final equation and the result in <answer> </answer> tags, for example, <answer> (99 - 70) * (37 / 18) = 69 </answer>.<|im_end|>
<|im_start|>assistant
Let me solve this step by step.
<think>