1-(5/6)+(7/12)-(9/20)+(11/30)-(13/42).
1-(5/6)+(7/12)-(9/20)+(11/30)-(13/42)．
<gadget id="calculator">5 / 6</gadget>
<output>5/6 = around 0.833333</output>

<gadget id="calculator">1 - (5/6)</gadget>
<output>1/6 = around 0.166667</output>

<gadget id="calculator">7 / 12</gadget>
<output>7/12 = around 0.583333</output>

<gadget id="calculator">9 / 20</gadget>
<output>9/20 = around 0.45</output>

<gadget id="calculator">(7/12) - (9/20)</gadget>
<output>2/15 = around 0.133333</output>

<gadget id="calculator">11 / 30</gadget>
<output>11/30 = around 0.366667</output>

<gadget id="calculator">13 / 42</gadget>
<output>13/42 = around 0.309524</output>

<gadget id="calculator">(11/30) - (13/42)</gadget>
<output>2/35 = around 0.057143</output>

<gadget id="calculator">(1/6) + (2/15) + (2/35)</gadget>
<output>5/14 = around 0.357143</output>

<result>5/14 = around 0.357143</result>