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+#print
+It is often possible to leave out braces,
+but when you do be sure that you get the
+answer you really wanted.
+For example, does
+ x sup a over b
+produce the same output as
+ x sup {a over b}
+Answer yes or no.
+#copyin
+#user
+#uncopyin
+#match no
+#log
+#next
+5.1h 10
+5.2g 5