Schools A, B, and C jointly hold an art exhibition. Among the exhibited paintings, 41 are not from School A, and 38 are not from School B. There are 43 paintings from School A and School B. Then, the paintings from School C are How many pictures are there?
甲、乙、丙三校合办画展，参展的画中，有41幅不是甲校的，有38幅不是乙校的，甲、乙两校参展的画共43幅，那么，丙校参展的画有多少幅．
<gadget id="calculator">38 - 43</gadget>
<output>-5</output>

<gadget id="calculator">41 + (-5)</gadget>
<output>36</output>

<gadget id="calculator">36 / 2</gadget>
<output>18</output>

<result>18</result>