export bug when inserting systems of quadratic equations

I am a high school math teacher. One feature I particularly like about Keynote is its support for LaTeX language for inserting formulas. I often export Keynote presentations as PowerPoint files to use in the classroom. However, when inserting systems of quadratic equations, there is a compatibility issue with the PowerPoint export that causes the export to fail. I am seeking a solution to this problem. Thank you.For example，“\begin{cases}x=t(y+2) \\ x^{2}+2 y^{2}=4\end{cases}”can be used in keynote,but can not be exported properly to ppt