
I am not familiar with Axmath, but you can check the web site for MathType if you need to install an updated version: https://www.wiris.com/en/mathtype/.
Older versions of Word used to include a limited version of MathType, but that version was discontinued in 2018 (see https://support.microsoft.com/en-us/office/equation-editor-6eac7d71-3c74-437b-80d3-c7dea24fdf3f).