-4r+3
<|im_start|>system
You are a helpful assistant.<|im_end|>
<|im_start|>user
Simplify $(r^2 + 3r - 2) - (r^2 + 7r - 5)$.
Please reason step by step, and put your final answer within \boxed{{}}.<|im_end|>
<|im_start|>assistant

user
-4r+3
Simplify $(r^2 + 3r - 2) - (r^2 + 7r - 5)$.
train