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Hi. I need write a big parenthesis when I evaluate a function. I'm using \left( and \right), but the result is wear.

$P\left( 1 + \dfrac{1}{2+\dfrac{1}{3+\dfrac{1}{ \begin{array}{c}{\ddots} \\ n-2 + \dfrac{1}{ n-1 + \dfrac{1}{n}} \end{array} }}}\right)$

How I can reduce the space in the top of ...

Hi. I write a test for several levels. This test have common question for some of the levels. For years I separate the problems in several files and call them with an input, in different archives. Then I try to write one archive that contain all the problems and with an If-tree and a lot of booleans ...

I'm trying to change the name of the pdf output within the code in the first line before document class with the line command:
%& -jobname= newname oldname.tex
And I compile with "PDFTeXify" button. Sometimes WinEdt creates the PDF but throws an error that only say PDFTeXify failed to create a ...