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<math xmlns="http://www.w3.org/1998/Math/MathML"> <mstyle displaystyle="true"> <msup> <mrow> <mi> x </mi> </mrow> <mrow> <mn> 2 </mn> </mrow> </msup> <mo> + </mo> <mn> 3 </mn> <mi> x </mi> <mo> - </mo> <mn> 1 </mn> <mo> = </mo> <mn> 2 </mn> </mstyle> </math>
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