(r+5)^2
<|im_start|>system
You are a helpful assistant.<|im_end|>
<|im_start|>user
Factor $r^2+10r+25$.
Please reason step by step, and put your final answer within \boxed{{}}.<|im_end|>
<|im_start|>assistant

user
(r+5)^2
Factor $r^2+10r+25$.
train