<|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 [12, 4, 6, 5], create an equation that equals 61. You can use basic arithmetic operations (+, -, *, /) and each number can only be used once. The problem can be solved using any number and special operations like factorial (though take care with the number of operations used). Show your work in <think> </think> tags. And return the final equation and answer in <answer> </answer> tags, for example <answer> (1 + 2) / 3 = 1 </answer>.<|im_end|>
<|im_start|>assistant
Let me solve this step by step.
<think>