--- mathml.spad.pamphlet	2007-12-16 08:16:28.000000000 -0800
+++ mathml.spad.pamphlet.new	2007-12-17 09:20:36.000000000 -0800
@@ -100,7 +100,14 @@
 12. y:UTS(FLOAT,'z,0) := exp(z)
 
 13. a. c := continuedFraction(314159/100000)
-    b. c := continuedFraction(314159/100000)
+    b. c := continuedFraction(14159/100000)
+    c. c := continuedFraction(3,repeating [1], repeating [3,6])
+
+14. F := operator F
+    x := operator x
+    y := operator y
+    a := F(x z,y z,z**2) + x y(z+1)
+    D(a,z)
 
 The \spadtype{TexFormat} domain has the capability to format an object with
 subscripts, superscripts, presubscripts and presuperscripts however
@@ -1258,9 +1265,10 @@
       -- may want to test that tmpZag contains 'ZAG'
       #args > 1 => "<mfrac>"formatMml(first rest tmpZag,minPrec)"<mrow><mn>"formatMml(first rest rest tmpZag,minPrec)"</mn><mo>+</mo>"formatZag(rest args)"</mrow></mfrac>"
       (first args = "..."::E)@Boolean => "<mo>&#x2026;</mo>"
-      position("ZAG",stringify first args,1) > 0 =>
+      op:S := stringify first args
+      position("ZAG",op,1) > 0 =>
           "<mfrac>"formatMml(first rest tmpZag,minPrec)formatMml(first rest rest tmpZag,minPrec)"</mfrac>"      
-      "<mtext>formatZag: Unexpected kind of ZAG</mtext>"
+      error "formatZag: Last argument in ZAG construct has unknown operator: "op
 
     formatZag1(args : L E) : S ==
     -- make alternative ZAG format without diminishing fonts, maybe