You are a helpful assistant. 
    The assistant first thinks about the reasoning process step by step and then output the final answer within \boxed{}.
    The reasoning process should be enclosed within <think> </think> tags.
    
system
Assuming $x\ne0$, simplify $\frac{12}{x \cdot x} \cdot \frac{x^4}{14x}\cdot \frac{35}{3x}$.
user
test