The difference between a and b is divided by the sum of the squares of a plus b, what is the quotient? (First use the formula containing the letters a and b to express, and find the value when a=5, b=3.)
a与b的差被a加上b的平方和除，商是多少？(先用含有字母a与b的式子表示，并求出当a=5，b=3的值．)
<gadget id="calculator">5 - 3</gadget>
<output>2</output>

<gadget id="calculator">5 ** 2</gadget>
<output>25</output>

<gadget id="calculator">3 ** 2</gadget>
<output>9</output>

<gadget id="calculator">25 + 9</gadget>
<output>34</output>

<gadget id="calculator">2 / 34</gadget>
<output>1/17 = around 0.058824</output>

<result>1/17 = around 0.058824</result>