#once #create message.ND.EQdelim $$.EN.LPThe problem is really that we need a way to tell neqnthat in spite of blanks, a group of things (like the $pi$and the +1) have to be kept together as a single superscript.The way that this is done is to enclose the group inbraces - the characters { and } - like this:  .EQ  x sup {pi + 1}  .ENThis tells neqn that everything inside the braces belongsto the superscript, in spite of blanks and tildes.(You don't need blanks before and after braces themselves -like tildes, they act as delimiters.)Modify the file "Example" so that the output looks likethe following, then type "ready".(To get $==$, type ==.).pl 1#once #create Ref.LP.EQx sup {pi +1} == y sup z sup {alpha + beta}.EN.pl 1#once #create Example.LP.EQreplace me.EN.pl 1##once neqn Ref | nroff >X1 &#once neqn message Ref | nroff -T$term %s/tinyms -#userneqn Example | nroff >X2#cmp X1 X2#log#next5.1c 105.2b 5