Hi there, I have been using the latex exam.cls and org-latex-classes. Just us add the following to your .emacs file (for more details see http://comments.gmane.org/gmane.emacs.orgmode/74512)
(add-to-list 'org-latex-classes '("Prob" "\\documentclass[t]{exam} [NO-DEFAULT-PACKAGES] \\usepackage{hyperref} \\usepackage{graphicx} \\usepackage{color} \\usepackage{amssymb,amsmath} \\usepackage{palatino} \\usepackage[mathscr]{eucal} \\usepackage[margin=1in]{geometry} % PAGE LAYOUT \\setlength{\\parskip}{-1ex}% \\setlength{\\parskip}{0ex}% \\setlength{\\itemsep}{0ex}% \\pagestyle{headandfoot} \\sloppy \\extraheadheight{.5in} \\runningheadrule \\firstpageheadrule \\firstpagefootrule \\runningfootrule \\lhead{} \\chead{} \\lfoot{} \\cfoot{} \\renewcommand\\thequestion{\\Roman{question}} \\renewcommand\\thepartno{\\arabic{partno}} “ ("\\begin{questions}{%s}" "\\end{questions}") )) Note that this assumes that you have installed the exam latex class on your system. Here is a simple test file #+LaTeX_CLASS: Prob #+TITLE: #+LaTeX_CLASS_OPTIONS: [12pt,letterpaper,answers] #+DATE: #+OPTIONS: toc:nil texht:nil #+BIND: org-export-latex-title-command "" * ** We can demodulate a DSB-SC signal by first multiplying the modulated signal will a locally generated carrier, and then applying a low pass filter to the resulting signal. *** Verify in time-domain that this produce the message signal $m(t)$ *** Describe the demodulation process in frequency domain I hope this help Cheers, M