A boy squirrel gathers 6 walnuts and carries them to his burrow in the tree, adding to the 12 already there, and dropping 1 on the way. The girl squirrel brings 5 more walnuts to their burrow and eats 2.  How many walnuts are left?
With the boy's contribution, there are 12 + 6 = 
<gadget id="calculator">12+6</gadget>
<output>18</output>
18 walnuts.
When he drops 1, now they have 18 - 1 = 
<gadget id="calculator">18-1</gadget>
<output>17</output>
17 walnuts.
The girl adds to their stash, making the count 17 + 5 = 
<gadget id="calculator">17+5</gadget>
<output>22</output>
22 walnuts.
When the girl eats 2, the final count is 22 - 2 = 
<gadget id="calculator">22-2</gadget>
<output>20</output>
20 walnuts.

<result>20</result>