9y
<|im_start|>system
You are a helpful assistant.<|im_end|>
<|im_start|>user
Simplify $2y + 3y+4y$.
Please reason step by step, and put your final answer within \boxed{{}}.<|im_end|>
<|im_start|>assistant

user
9y
Simplify $2y + 3y+4y$.
train