There are 45 students. In an exam, 35 people got the first question right, 33 people got the second question right, and 25 got both questions right. Ask how many students get both questions wrong?
有45名同学，在一次考试中，做对第一题的有35人，做对对第二题的有33人，两题都做对的有25人．问多少个同学两题都做得不对？
<gadget id="calculator">33 - 25</gadget>
<output>8</output>

<gadget id="calculator">35 + 8</gadget>
<output>43</output>

<gadget id="calculator">45 - 43</gadget>
<output>2</output>

<result>2</result>