计算：|-2|-9+(13)-1+(-1)2011-(π-3)0．-数学

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• ①计算：22-(-12)-2+3-1-19+(π-3.14)0②化简：(a2-aa-1-aa+1)÷(1+1a2-1)③解方程：3x-2=2+x2-x．-数学
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