<|im_start|>system
You are a helpful assistant. You first think about the reasoning process in the mind and then provide the user with the answer. You should try to truely solve the question by yourself without cheating.  <|im_end|>
<|im_start|>user
 Find the sum of the coefficients of the terms in the expansion of $( \sqrt {x}- \dfrac {3}{x})^{9}$ that do not contain $x^{3}$. Express your answer as an integer. Show your work in <think> </think> tags. And return the final answer in <answer> </answer> tags.<|im_end|>
<|im_start|>assistant
Let me solve this step by step.
<think>
user
-485
Find the sum of the coefficients of the terms in the expansion of $( \sqrt {x}- \dfrac {3}{x})^{9}$ that do not contain $x^{3}$. Express your answer as an integer.
test