<|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 [5, 10, 11, 12], create an equation that equals 83. You can use up to two basic arithmetic operations (+, -, *, /) each time and you are allowed to add a number to itself up to twice. Show all work in <think> </think> tags. Return the final equation and answer in <answer> </answer> brackets, for example <answer> (10 + 12) * 7 = 83 </answer>.<|im_end|>
<|im_start|>assistant
Let me solve this step by step.
<think>