8746-3874+1874+1254．
8746-3874+1874+1254．
<gadget id="calculator">8_746 - 3_874</gadget>
<output>4_872</output>

<gadget id="calculator">4_872 + 1_874 + 1_254</gadget>
<output>8_000</output>

<result>8_000</result>