Suppose $y={\displaystyle \underset{n=n}{\overset{}{}}}{a}_n{x}^{n}onan$ open interval I that contains the origin. Express the following $as$ a simplified

power series $inxon$ I.

$(3+x^2)y^{\text{'}\text{'}}+(x^2)y^{\text{'}}+3y$

$=|$

$a_{n+2}+r{a}_{n-1}+|$