Find the constant term in the expansion of $\left( \frac{3}{2} x^2 - \frac{1}{3x} \right)^6.$
<|im_start|>system
You are a helpful assistant.<|im_end|>
<|im_start|>user
Find the constant term in the expansion of $\left( \frac{3}{2} x^2 - \frac{1}{3x} \right)^6.$
Please reason step by step, and put your final answer within \boxed{{}}.<|im_end|>
<|im_start|>assistant

user
\frac{5}{12}
Find the constant term in the expansion of $\left( \frac{3}{2} x^2 - \frac{1}{3x} \right)^6.$
train