formula not working in my libreoffice

I am writing a presentation with formulas,

but formula and math are not working in my libre office,
I followed the tutorials, but the package is simply not there.

How can I install it?

My version is,

Build ID:

What is your operating system name and version? If on Linux then you can search the package in terminal:

apt-cache search libreoffice*

OP: @pedro60bicudo