There are 52 people in a class, 35 people like mathematics, 25 people like Chinese, how many people like both Chinese and mathematics?
一个班上共52人，喜欢数学的35人，喜欢语文的25人，问既喜欢语文又喜欢数学的多少人？
<gadget id="calculator">25 - 52</gadget>
<output>-27</output>

<gadget id="calculator">35 + (-27)</gadget>
<output>8</output>

<result>8</result>