(1/5)+(4/17)-(2/85).
(1/5)+(4/17)-(2/85)．
<gadget id="calculator">1 / 5</gadget>
<output>1/5 = around 0.2</output>

<gadget id="calculator">4 / 17</gadget>
<output>4/17 = around 0.235294</output>

<gadget id="calculator">2 / 85</gadget>
<output>2/85 = around 0.023529</output>

<gadget id="calculator">(4/17) - (2/85)</gadget>
<output>18/85 = around 0.211765</output>

<gadget id="calculator">(1/5) + (18/85)</gadget>
<output>7/17 = around 0.411765</output>

<result>7/17 = around 0.411765</result>