In "(1/7), (2/13), (3/19), (4/23), (5/29)", what is the sum of the largest and smallest fractions?
在"(1/7)，(2/13)，(3/19)，(4/23)，(5/29)"中，最大与最小的分数和是多少．
<gadget id="calculator">1 / 7</gadget>
<output>1/7 = around 0.142857</output>

<gadget id="calculator">4 / 23</gadget>
<output>4/23 = around 0.173913</output>

<gadget id="calculator">(1/7) + (4/23)</gadget>
<output>51/161 = around 0.31677</output>

<result>51/161 = around 0.31677</result>