Find the pattern and fill in the blanks: how much is 2, 5, 10, 17, 26 50．
找规律填空：2,5,10,17,26多少50．
<gadget id="calculator">9 + 2</gadget>
<output>11</output>

<gadget id="calculator">26 + 11</gadget>
<output>37</output>

<result>37</result>