Apparently this solution is too long for posting, so I've written it elsewhere and am attaching screenshots of it.
The first four terms of each solution are
[tex]1-\dfrac23x^3+\dfrac5{36}x^6-\dfrac{10}{567}x^9[/tex]
and
[tex]x-\dfrac1{24}x^4+\dfrac1{315}x^7-\dfrac7{32,400}x^{10}[/tex]
