Ok; thanks. I'm posting an image here to see how well it works. This is the formula for computing distance from one point on a Cartesian plane to another:
![\[d=\sqrt{{{\left( {{x}_{2}}-{{x}_{1}} \right)}^{2}}+{{\left( {{y}_{2}}-{{y}_{1}} \right)}^{2}}}\]](https://support.nabble.com/file/n2193822/distance.gif)
. This works great with MathType software if the author includes LaTeX alt text on the images, as mine has.