<|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
Create an equation that uses the numbers [4, 10, 15, 60] to reach a target number of 45. Each number should only be used once and you may use basic arithmetic operations. Show your work in <think> </think> tags, and return the final equation in <answer> </answer> tags, as a formatted string. <|im_end|>
<|im_start|>assistant
Let me solve this step by step.
<think>