texto expandible no me funciona (show-more)

HOLA
My problem is that I don't know how to replace, in your codes
("#myTextElement")
the names of my elements, to be correct

1 - my text is called text5
2 - but when I pass the mouse it comes out as # text5
What should i put?

FURTHER
3 - I keep the quotes or delete ""
4 - I keep the brackets or delete them ()

THANK YOU