**4. Conclusions**

In this article, we study the oscillatory behavior of a class of nonlinear fourth-order differential equations and establish sufficient conditions for oscillation of a fourth-order differential equation by using Riccati transformation. Furthermore, in future work, we ge<sup>t</sup> some Hille and Nehari type and Philos type oscillation criteria of (1).

**Author Contributions:** O.B.: Writing original draft, and writing review and editing. M.P.: Formal analysis, writing review and editing, funding and supervision. All authors have read and agreed to the published version of the manuscript.

**Funding:** The authors received no direct funding for this work.

**Acknowledgments:** The authors thank the reviewers for for their useful comments, which led to the improvement of the content of the paper.

**Conflicts of Interest:** The authors declare no conflict of interest.
