((2007+2006*2008)/(2007*2008-1))+((2008+2007*2009)/(2008*2009-1)).
((2007+2006*2008)/(2007*2008-1))+((2008+2007*2009)/(2008*2009-1))．
<gadget id="calculator">2_006 * 2_008</gadget>
<output>4_028_048</output>

<gadget id="calculator">2_007 + 4_028_048</gadget>
<output>4_030_055</output>

<gadget id="calculator">2_007 * 2_008</gadget>
<output>4_030_056</output>

<gadget id="calculator">4_030_056 - 1</gadget>
<output>4_030_055</output>

<gadget id="calculator">4_030_055 / 4_030_055</gadget>
<output>1</output>

<gadget id="calculator">2_007 * 2_009</gadget>
<output>4_032_063</output>

<gadget id="calculator">2_008 + 4_032_063</gadget>
<output>4_034_071</output>

<gadget id="calculator">2_008 * 2_009</gadget>
<output>4_034_072</output>

<gadget id="calculator">4_034_072 - 1</gadget>
<output>4_034_071</output>

<gadget id="calculator">4_034_071 / 4_034_071</gadget>
<output>1</output>

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

<result>2</result>