<|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
Given the numbers [10, 22, 55, 15], create an equation that simplifies to 70 using basic arithmetic operations (+, -, *, /) with each number only being used one time. Show your work in <think> </think> tags. And return the equation and the final answer in <answer> </answer>.<|im_end|>
<|im_start|>assistant
Let me solve this step by step.
<think>