6+19+67+84-89-21+145-6-68=how much.
6+19+67+84-89-21+145-6-68=多少．
<gadget id="calculator">6 - 6</gadget>
<output>0</output>

<gadget id="calculator">67 - 68</gadget>
<output>-1</output>

<gadget id="calculator">19 - 21</gadget>
<output>-2</output>

<gadget id="calculator">84 + 145</gadget>
<output>229</output>

<gadget id="calculator">0 + (-1) + (-2) + 229</gadget>
<output>226</output>

<result>226</result>