(1/3)+(2/5)-(11/30).
(1/3)+(2/5)-(11/30)．
<gadget id="calculator">1 / 3</gadget>
<output>1/3 = around 0.333333</output>

<gadget id="calculator">2 / 5</gadget>
<output>2/5 = around 0.4</output>

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

<gadget id="calculator">(2/5) - (11/30)</gadget>
<output>1/30 = around 0.033333</output>

<gadget id="calculator">(1/3) + (1/30)</gadget>
<output>11/30 = around 0.366667</output>

<result>11/30 = around 0.366667</result>