Evaluate $531^2 - 2\cdot 531\cdot 530 + 530^2$.
<|im_start|>system
You are a helpful assistant.<|im_end|>
<|im_start|>user
Evaluate $531^2 - 2\cdot 531\cdot 530 + 530^2$.
Please reason step by step, and put your final answer within \boxed{{}}.<|im_end|>
<|im_start|>assistant

user
1
Evaluate $531^2 - 2\cdot 531\cdot 530 + 530^2$.
train