--- loncom/html/adm/help/tex/Problem_LON-CAPA_Functions.tex	2008/06/12 00:47:08	1.17
+++ loncom/html/adm/help/tex/Problem_LON-CAPA_Functions.tex	2008/06/14 16:41:34	1.18
@@ -65,7 +65,8 @@ Option 4 - @all = \&languages($\backslas
 \&roundto(\$x,\$n)  & Rounds a real number to n decimal points. \$x and \$n can be pure numbers \\
 \hline
  
-\&cas(\$s,\$e)&Evaluates the expression \$e inside the symbolic algebra system \$s. Currently, only the Maxima symbolic math system is implemented. Example: \&cas('maxima','6*7')\\ 
+\&cas(\$s,\$e,\$l)&Evaluates the expression \$e inside the symbolic algebra system \$s. Currently, only the Maxima symbolic math system is implemented. 
+\$l is an optional comma-separated list of libraries. Example: \&cas('maxima','6*7')\\ 
 \hline 
 
 \&implicit\_multiplication(\$f)&Adds mathematical multiplication operators to the formula expression \$f where only implicit multiplication is used. Example: \&implicit\_multiplication('2(b+3c)') returns 2*(b+3*c) \\