diff --git a/.shell.d/funs_rc b/.shell.d/funs_rc
index aca9ed81..dd04f0f1 100644
--- a/.shell.d/funs_rc
+++ b/.shell.d/funs_rc
@@ -796,61 +796,26 @@ formatc()
 	    -name "*.[ch]~" -o \
 	    -name "*.[ch]~[0-9]*~" \) \
         -delete
+}
 
+## LaTeX quick compiler. It adds the preambule -- and the \end{document} --
+## automatically.
+ltx()
+{
+    if [ $# -ne 1 ]; then
+        echo "Usage: $0 FILE"
+        return
+    fi
 
-    # ## Manual method.
-    # ## Remove trailing whitespace
-    # sed -i 's/\s*$//g' "$FILE"
+    local PREAMBLE
+    local END
 
-    # ## Function parenthesis
-    # sed -i 's/\([^ ]\)(/\1 (/g' "$FILE"
-    # sed -i 's/\s\s\+(/ (/g' "$FILE"
-        
-    # ## Semicolon
-    # sed -i 's/\([^ ]\);/\1 ;/g' "$FILE"
-    # sed -i 's/;\([^ ]\)/; \1/g' "$FILE"
-    # # Skip line -- Bad idea because of 'for' loops.
-    # # sed -i 's/^\(\s*\)\(.*\);\s*\(.\+\)$/\1\2;\n\1\3/g' "$FILE"
+    ## One line is mandatory.
+    PREAMBLE='\documentclass[10pt,a4paper]{article}\usepackage[utf8]{inputenc}\usepackage[T1]{fontenc}\usepackage{amsmath,amssymb,amsfonts}\usepackage{geometry}\usepackage{lmodern}\usepackage{marvosym}\usepackage{textcomp}\DeclareUnicodeCharacter{20AC}{\EUR{}}\DeclareUnicodeCharacter{2264}{\leqslant}\DeclareUnicodeCharacter{2265}{\geqslant}\begin{document}\input'
 
-    # ## Commas
-    # sed -i 's/\s\s\+,/,/g' "$FILE"
-    # sed -i 's/,\([^ ]\)/, \1/g' "$FILE"
-
-    # ## Plus/Minus
-    # sed -i 's/\([^+-]\)\([-+]\)\([^ +-]\)/\1\2 \3/g' "$FILE"
-    # sed -i 's/\([^ +-]\)\([-+]\)\([^+-]\)/\1 \2\3/g' "$FILE"
-    # sed -i 's/\( \+++\)/++/g' "$FILE"
-    # sed -i 's/\(++ \+\)/++/g' "$FILE"
-    # sed -i 's/\( \+--\)/--/g' "$FILE"
-    # sed -i 's/\(-- \+\)/--/g' "$FILE"
-
-    # ## Modulus, equality, affectation, binary ops, comparison
-    # sed -i 's/\s\s\+\(%\|==\|&&\|||\|<=\|>=\|!=\)/ \1/g' "$FILE"
-    # sed -i 's/\(%\|==\|&&\|||\|<=\|>=\|!=\)\s\s\+/\1 /g' "$FILE"
-    # sed -i 's/\([^ ]\)\(%\|==\|&&\|||\|<=\|>=\|!=\)/\1 \2/g' "$FILE"
-    # sed -i 's/\(%\|==\|&&\|||\|<=\|>=\|!=\)\([^ ]\)/\1 \2/g' "$FILE"
-
-    # ## Equality, >, <
-    # sed -i 's/\s\s\+\([<>=]\)/ \1/g' "$FILE"
-    # sed -i 's/\([<>=]\)\s\s\+/\1 /g' "$FILE"
-    # sed -i 's/\([<>=]\)\([^ =]\)/\1 \2/g' "$FILE"
-    # sed -i 's/\([^ ]\)\([<>]\)/\1 \2/g' "$FILE"
-    # sed -i 's/\([^ =<>]\)\(=\)/\1 \2/g' "$FILE"
-
-    # ## Asterisk, slash
-    # sed -i 's/\s\s\+\*/ \*/g' "$FILE"
-    # sed -i 's/\*\s\s\+/\* /g' "$FILE"
-
-    # sed -i 's/\([^\/]\)\/\s\+/\1\//g' "$FILE"
-    # sed -i 's/\s\+\/\([^\/]\)/\/\1/g' "$FILE"
-
-
-    # ## Braces
-    # sed -i 's/^\( *\)\(.\+\) *{ *$/\1\2\n\1{/g' "$FILE"
-
-    # ## Proper comments
-    # sed -i 's:// *\([[:lower:]]\):// \u\1:g' "$FILE"
-    # sed -i 's:\(//.*[^\.]\)$:\1\.:g' "$FILE"
+    END='\end{document}'
+    
+    pdflatex -file-line-error-style -interaction nonstopmode -jobname="${1%.tex}" "$PREAMBLE" "$1" "$END"
 }
 
 ##==============================================================================