Evaluate: $\left( \frac{1}{2} + \frac{1}{3} \right) \left( \frac{1}{2} - \frac{1}{3} \right)$
<|im_start|>system
You are a helpful assistant.<|im_end|>
<|im_start|>user
Evaluate: $\left( \frac{1}{2} + \frac{1}{3} \right) \left( \frac{1}{2} - \frac{1}{3} \right)$
Please reason step by step, and put your final answer within \boxed{{}}.<|im_end|>
<|im_start|>assistant

user
\frac{5}{36}
Evaluate: $\left( \frac{1}{2} + \frac{1}{3} \right) \left( \frac{1}{2} - \frac{1}{3} \right)$
train