1995+1996+1997+1998+1999-2000.
1995+1996+1997+1998+1999-2000．
<gadget id="calculator">1_999 - 2_000</gadget>
<output>-1</output>

<gadget id="calculator">1_995 + 1_996 + 1_997 + 1_998 + (-1)</gadget>
<output>7_985</output>

<result>7_985</result>