Have you tried the equation editor within word? It is a freebie but
you have to make sure it is installed. I do all my handouts using
Word's equation editor.
This solution has the execrable features of (a) breaking every time
Word is updated; once you create equations with EE version n+1, they
cannot be edited in EE version n; (b) creating obscenely large
graphic objects out of every item you insert, which then must be
edited with the EE, rather than any old text editor that can work
with something like the text string $\hat{y} = \hat{beta}_0 + \hat
{\beta}_1}$.
Have a look at any article of the Stata Journal that contains some
maths if you want to see what typeset mathematics should look like.
**Anyone** can produce mathematical typesetting of that quality with
LaTeX, in many programs just by clicking on the appropriate icons for
Greek letters, summations, integrals, etc. And it handles auto-sizing
of all objects perfectly. And it is platform-independent and, best of
all, is totally free.
About 90-95% of the job market papers we receive from new PhDs when a
new faculty position is advertised are produced with LaTeX. Those
that aren't do not reflect very well on the applicants.