Calculation: ((2009+2008*2010)/(2009*2010-1))+((2010+2009*2011)/(2010*2011-1))-((2011+2010*2012)/(2011* 2012-1)).
计算：((2009+2008*2010)/(2009*2010-1))+((2010+2009*2011)/(2010*2011-1))-((2011+2010*2012)/(2011*2012-1))．
<gadget id="calculator">2_008 * 2_010</gadget>
<output>4_036_080</output>

<gadget id="calculator">2_009 + 4_036_080</gadget>
<output>4_038_089</output>

<gadget id="calculator">2_009 * 2_010</gadget>
<output>4_038_090</output>

<gadget id="calculator">4_038_090 - 1</gadget>
<output>4_038_089</output>

<gadget id="calculator">4_038_089 / 4_038_089</gadget>
<output>1</output>

<gadget id="calculator">2_009 - 1</gadget>
<output>2_008</output>

<gadget id="calculator">2_009 * 2_011</gadget>
<output>4_040_099</output>

<gadget id="calculator">2_010 + 4_040_099</gadget>
<output>4_042_109</output>

<gadget id="calculator">2_010 * 2_011</gadget>
<output>4_042_110</output>

<gadget id="calculator">4_042_110 - 1</gadget>
<output>4_042_109</output>

<gadget id="calculator">4_042_109 / 4_042_109</gadget>
<output>1</output>

<gadget id="calculator">2_010 * 2_012</gadget>
<output>4_044_120</output>

<gadget id="calculator">2_011 + 4_044_120</gadget>
<output>4_046_131</output>

<gadget id="calculator">2_011 * 2_012</gadget>
<output>4_046_132</output>

<gadget id="calculator">4_046_132 - 1</gadget>
<output>4_046_131</output>

<gadget id="calculator">4_046_131 / 4_046_131</gadget>
<output>1</output>

<gadget id="calculator">1 - 1</gadget>
<output>0</output>

<gadget id="calculator">2_008 + 0</gadget>
<output>2_008</output>

<gadget id="calculator">4_038_089 + 0</gadget>
<output>4_038_089</output>

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

<gadget id="calculator">2_009 + 0</gadget>
<output>2_009</output>

<gadget id="calculator">4_042_109 + 0</gadget>
<output>4_042_109</output>

<gadget id="calculator">2_011 - 1</gadget>
<output>2_010</output>

<gadget id="calculator">2_010 + 0</gadget>
<output>2_010</output>

<gadget id="calculator">4_046_131 + 0</gadget>
<output>4_046_131</output>

<gadget id="calculator">1 + 1 + 1</gadget>
<output>3</output>

<result>3</result>