If you change the equation font in MS Word via the Home tab on the ribbon, it changes back to the default maths font. There is one limitation in the equation tool it only has one font. You can basically just write an equation with a graphical pen tool and MS Word will be able to read it. It really is very well equipped and on Windows 10, it supports Inking an equation. Additionally, there is a tool that lets you enter standard formulas for example, the formula for calculating the area of a circle.
There is a dedicated tool for equations that supports both mathematical and statistical symbols.
You can insert mathematical equations in MS Word.