(13/12) minus the sum of (1/4) and (1/3), what is the difference?
(13/12)减去(1/4)和(1/3)的和，差是多少？
<gadget id="calculator">13 / 12</gadget>
<output>13/12 = around 1.083333</output>

<gadget id="calculator">1 / 4</gadget>
<output>1/4 = around 0.25</output>

<gadget id="calculator">1 / 3</gadget>
<output>1/3 = around 0.333333</output>

<gadget id="calculator">(1/4) + (1/3)</gadget>
<output>7/12 = around 0.583333</output>

<gadget id="calculator">(13/12) - (7/12)</gadget>
<output>1/2 = around 0.5</output>

<result>1/2 = around 0.5</result>