<|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 [45, 30, 2, 12], create an equation that equals 135. You can use basic arithmetic operations (+, -, *, /) and each number can only be used once. Show your work in <think> </think> tags. And return the final equation and answer in <answer> </answer> tags, for example <answer> 45 + 30 + 2 * 12 = 135 </answer>.<|im_end|>
<|im_start|>assistant
Let me solve this step by step.
<think>