There were some people on the bus, another 25 people got on, and then 8 people got off, and there were still 34 people left. How many people were there on the bus?
公共汽车上原有一些人，又上来25人，然后再下去了8人，这时还剩34人．公共汽车上原来有多少人？
<gadget id="calculator">8 - 25</gadget>
<output>-17</output>

<gadget id="calculator">34 + (-17)</gadget>
<output>17</output>

<result>17</result>