Calculation: ((4/3)-(15/36)+(9/20)-(7/12))-(11/30)+(13/42)=how much.
计算：((4/3)-(15/36)+(9/20)-(7/12))-(11/30)+(13/42)=多少．
<gadget id="calculator">4 / 3</gadget>
<output>4/3 = around 1.333333</output>

<gadget id="calculator">15 / 36</gadget>
<output>5/12 = around 0.416667</output>

<gadget id="calculator">(4/3) - (5/12)</gadget>
<output>11/12 = around 0.916667</output>

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

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

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

<gadget id="calculator">(11/12) + (-2/15)</gadget>
<output>47/60 = around 0.783333</output>

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

<gadget id="calculator">(47/60) - (11/30)</gadget>
<output>5/12 = around 0.416667</output>

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

<gadget id="calculator">(5/12) + (13/42)</gadget>
<output>61/84 = around 0.72619</output>

<result>61/84 = around 0.72619</result>