If you are trying to display mathematical expressions for LaTeX or similiar then see this topic, many find it useful.
We don’t have to be in this case, we just have to be attentive, e.g. the topic title.
Why TeX formatting not rendering 
If you are trying to display mathematical expressions for LaTeX or similiar then see this topic, many find it useful.
We don’t have to be in this case, we just have to be attentive, e.g. the topic title.
Why TeX formatting not rendering