Both P and A are prime numbers, and 5P+7A=29, then PA+AP-P+A=how many.
P、A均为质数，且5P+7A=29，则PA+AP-P+A=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>