Add equations that flows with the text in the keynote I'd like to make some slides with equations using Keynote. The standard way is to leave some blanks for the formula among the text, and cover the blanks with the LatexIT formulas. Since the formula does not flow with the text, if I need to modify the text by adding a word in the middle, then all the blanks after the word are shifted and I need to shift all the formula one by one manually to match the blanks. This is headache when there are lots of formula.

I am asking if there is a way to let the formula flow together with the text so that I do not need to manually shift the formula one by one? Even better, whether it is possible to add equations directly in the text without leaving the blanks first? 

I am using the keynote on the MacBook Pro (MacOS Mojave 10.14.6). The keynote version is 9.0.1 (6196).
One way of having equations flow with the text is to use the equation editor inside Keynote to create equations.

You can use Insert > Equation menu at the top of Keynote or press Alt ⌥+Command ⌘+E to activate the equation edtior.

The equation editor in Keynote supports both LaTeX and MathML. See this Apple Support page for more details.

Below is an example Keynote slide that includes an equation created with the equation editor: