(5/9)-(3/11)+(4/9)-(8/11).
(5/9)-(3/11)+(4/9)-(8/11)．
<gadget id="calculator">5 / 9</gadget>
<output>5/9 = around 0.555556</output>

<gadget id="calculator">3 / 11</gadget>
<output>3/11 = around 0.272727</output>

<gadget id="calculator">(5/9) - (3/11)</gadget>
<output>28/99 = around 0.282828</output>

<gadget id="calculator">4 / 9</gadget>
<output>4/9 = around 0.444444</output>

<gadget id="calculator">8 / 11</gadget>
<output>8/11 = around 0.727273</output>

<gadget id="calculator">(4/9) - (8/11)</gadget>
<output>-28/99 = around -0.282828</output>

<gadget id="calculator">(28/99) + (-28/99)</gadget>
<output>0</output>

<result>0</result>