On most of the documents I have worked with this does not happen. On one of them, every time I execute the whole document (!!!) the typesetting rule assistant pops up. What is causing this and how can I turn it off! It is very annoying...

Hello, I am trying to do something very simple, or so I thought. From the solve help, I found this example: solve(x*t(x)+x^3-5, t); Now to my way of thinking, I have just solved an equation that gives me a function of x, namely t = t(x). But when I try to evaluate t at say, 3, I do not get the correct answer: t(3); gives the helpful response: t(3) How can I get this to work? Thank you.