Xiao Ming conducted a survey on the programs that 45 students in this class like to watch. Among them, 25 like to watch animation, 17 like to watch popular science, and 8 don't like both. How many names are there in the popular science category?
小明对本班45名同学所喜欢看的节目进行调查，其中喜欢看动画类的有25名，喜欢看科普类的有17名，两类都不喜欢的有8名，既喜欢动画类，又喜欢科普类的有多少名？
<gadget id="calculator">25 + 17</gadget>
<output>42</output>

<gadget id="calculator">45 - 8</gadget>
<output>37</output>

<gadget id="calculator">42 - 37</gadget>
<output>5</output>

<result>5</result>