There are 46 students in Class 1, 17 of whom can ride a bicycle, 14 can swim, 4 can ride a bicycle and swim, and how many can neither.
六1班有学生46人，其中会骑自行车的17人，会游泳的14人，既会骑车又会游泳的4人，两样都不会的有多少人．
<gadget id="calculator">14 - 4</gadget>
<output>10</output>

<gadget id="calculator">17 + 10</gadget>
<output>27</output>

<gadget id="calculator">46 - 27</gadget>
<output>19</output>

<result>19</result>