<|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 [42, 23, 16, 15], create equations that equal 52. Show work in <think> </think> tags and provide multiple solutions, if possible. For example, you can show that 42 + 15 + (23 - 16) = 52. Return each solution in <answer> </answer> tags. Note: Ensure the use of each number only once and the proper use of signs for operations.<|im_end|>
<|im_start|>assistant
Let me solve this step by step.
<think>