It is known that x=2009, y=2010, then the algebraic formula ((xy)/(x))+(x-((2xy-y**2)/(x)))= what.
已知x=2009，y=2010，则代数式((x-y)/(x))+(x-((2xy-y**2)/(x)))=多少．
<gadget id="calculator">2_009 - 2_010</gadget>
<output>-1</output>

<gadget id="calculator">(-1) ** 2</gadget>
<output>1</output>

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

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

<result>0</result>