Nan Nan is (y-8) years old this year, and her father is (y+14) years old this year. What is the age difference between Nan Nan and her father last year?
楠楠今年(y-8)岁，爸爸今年(y+14)岁，去年楠楠和爸爸相差多少岁．
<gadget id="calculator">14 + 8</gadget>
<output>22</output>

<result>22</result>