When x=how much, (x+2)+3,2-x)=1.
当x=多少时，(x+2)+3,2-x)=1．
<gadget id="calculator">6 - 1</gadget>
<output>5</output>

<gadget id="calculator">2 + 5</gadget>
<output>7</output>

<gadget id="calculator">3 - 1</gadget>
<output>2</output>

<gadget id="calculator">7 / 2</gadget>
<output>7/2 = around 3.5</output>

<result>7/2 = around 3.5</result>