For more information see Use Math AutoCorrect rules outside of math regions check box. It is especially useful to write mathematical notation such as equations and formulae. Meaning the next equation has no integer solutions.
Cos x mathrm dx textrm this is textrm sum_19 y textsf this is textsf prod_19 z textnormal this is textnormal bigcup_19 w text and this is just text end eqnarray.
There are three ways to write a math equation in LaTeX and they are described as follows. HOW TO USE LATEX TO WRITE MATHEMATICAL NOTATION There are thr. Documentclass article begin document begin equation H_ k_pfrac Y_ k_p X_ k_p end equation end document Notice how Ive used the syntax of LaTeX to format the equation into the way you want - subscripts need the _ key and Ive used to indicate k_p should itself be a subscript. 27 9 will display as 27 9.