On a certain day in Beijing, the maximum temperature is 30°C and the minimum temperature is -5°C. What is the temperature difference in Beijing on this day?
北京市某天最高气温30℃，最低气温-5℃，这一天北京市的气温差是多少．
<gadget id="calculator">30 - (-5)</gadget>
<output>35</output>

<result>35</result>