Aligning text using latex suite

What I’m trying to do

Things I have tried

I’m struggling to align the bottom line of the equation with the rest.

Also, the command “csch” and “sech” don’t seem to work for me. Whenever I try to write them I get red letters.

Instead of inserting the code as a figure, it would be good to insert the code as text within a codeblock so we can also try and look for the cause of the problem.