Answer
No simplification possible
Work Step by Step
The two terms $x^{4}$ and $x^{9 }$ are dissimilar. Since these two terms are connected together by the addition operator, they cannot be further simplified.
You can help us out by revising, improving and updating this answer.
Update this answerAfter you claim an answer you’ll have 24 hours to send in a draft. An editor will review the submission and either publish your submission or provide feedback.