Simplify $\frac{2s^5}{s^3} - 6s^2 + \frac{7s^3}{s}$.
<|im_start|>system
You are a helpful assistant.<|im_end|>
<|im_start|>user
Simplify $\frac{2s^5}{s^3} - 6s^2 + \frac{7s^3}{s}$.
Please reason step by step, and put your final answer within \boxed{{}}.<|im_end|>
<|im_start|>assistant

user
3s^2
Simplify $\frac{2s^5}{s^3} - 6s^2 + \frac{7s^3}{s}$.
train