2013*2+2012*3+2011-2010*2-2009*3-2008+…9*2+8*3+7-6*2-5*3-4=how much.
2013*2+2012*3+2011-2010*2-2009*3-2008+…9*2+8*3+7-6*2-5*3-4=多少．
<gadget id="calculator">2_013 - 4</gadget>
<output>2_009</output>

<gadget id="calculator">2_009 + 1</gadget>
<output>2_010</output>

<gadget id="calculator">2_010 / 2</gadget>
<output>1_005</output>

<gadget id="calculator">6 * 1_005</gadget>
<output>6_030</output>

<result>6_030</result>