((x+2)/3)-((x-3)/4)=2.5.
((x+2)/3)-((x-3)/4)=2.5．
<gadget id="calculator">2 / 3</gadget>
<output>2/3 = around 0.666667</output>

<gadget id="calculator">3 / 4</gadget>
<output>3/4 = around 0.75</output>

<gadget id="calculator">2.5 - (2/3) - (3/4)</gadget>
<output>1.083333</output>

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

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

<gadget id="calculator">(1/3) - (1/4)</gadget>
<output>1/12 = around 0.083333</output>

<gadget id="calculator">1.083333 / (1/12)</gadget>
<output>12.999996</output>

<result>12.999996</result>