Both p and q are prime numbers, 5p+7q=29, so what is pq+qp-p+q equal to?
p、q都是质数，5p+7q=29，那么pq+qp-p+q等于多少？
<gadget id="calculator">3 ** 2</gadget>
<output>9</output>

<gadget id="calculator">2 ** 3</gadget>
<output>8</output>

<gadget id="calculator">8 - 3</gadget>
<output>5</output>

<gadget id="calculator">9 + 5 + 2</gadget>
<output>16</output>

<result>16</result>