Resposta :
[tex]\boxed{\begin{array}{l}\sf x^2+x^3+2x\Bigg|_{x=-2}=(-2)^2+(-2)^3+2\cdot(-2)\\\\\sf x^2+x^3+2x\Bigg|_{x=-2}=\backslash\!\!\!4-8- \backslash\!\!\!4=-8\end{array}}[/tex]
[tex]\boxed{\begin{array}{l}\sf x^2+x^3+2x\Bigg|_{x=-2}=(-2)^2+(-2)^3+2\cdot(-2)\\\\\sf x^2+x^3+2x\Bigg|_{x=-2}=\backslash\!\!\!4-8- \backslash\!\!\!4=-8\end{array}}[/tex]