Jack says he has 13 more notebooks in his bag than Gerald. Jack gives 5 notebooks to Paula and 6 notebooks to Mike. If Gerald has 8 notebooks, how many notebooks does Jack have left?
Jack had 13 more than 8 notebooks for a total of 13+8 = 
<gadget id="calculator">13+8</gadget>
<output>21</output>
21 notebooks.
He gave 5 notebooks to Paula so he has 21-5 = 
<gadget id="calculator">21-5</gadget>
<output>16</output>
16 notebooks left.
He gave another 6 to Mike so he has 16-6 = 
<gadget id="calculator">16-6</gadget>
<output>10</output>
10 notebooks left.

<result>10</result>