((2007*2008*2009*2010+1)/(2008**2+2007))-2008**2=how much.
((2007*2008*2009*2010+1)/(2008**2+2007))-2008**2=多少．
<gadget id="calculator">2_007 * 2_008 * 2_009 * 2_010</gadget>
<output>16_273_728_833_040</output>

<gadget id="calculator">16_273_728_833_040 + 1</gadget>
<output>16_273_728_833_041</output>

<gadget id="calculator">2_008 ** 2</gadget>
<output>4_032_064</output>

<gadget id="calculator">4_032_064 + 2_007</gadget>
<output>4_034_071</output>

<gadget id="calculator">16_273_728_833_041 / 4_034_071</gadget>
<output>4_034_071</output>

<gadget id="calculator">4_034_071 - 4_032_064</gadget>
<output>2_007</output>

<result>2_007</result>