<|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 [-50, 20, 7], generate an equation that results in the number 37. You can use basic arithmetic operations (+, -, *, /) and each number in the list can only be used once. Provide your work and solution in <think> </think> tags. And return the final equation, along with the answer, in <answer> </answer> tags, for example <answer> (20 - 7) * 1 = 13 </answer>.<|im_end|>
<|im_start|>assistant
Let me solve this step by step.
<think>