#4
#!/^;/ {total+=NF}
#END { print total}

#6
#$3 ~ /[1234567890]/ { TotalNF += $3 }
#END { print "razem=",TotalNF}

#9
#/^\$\$\$/ , /^\!\!\!/  {gsub(/\s/,"_");print}

#10
#{  for(i=1; i<=NF; i++)
#   { if($i!=0)
#          {
#           if (i==NF)
#           printf("%d", $i );
#      if (i==NF-1)
#           printf("%dx+", $i);
#      if (i!=NF && i<NF-1)
#           printf("%dx^%d+", $i , NF-i);
#          }
#   }
#   printf("\n")
#}

#5
#{  for(i=1; i<=NF; i++)
#   { if($i ~ /^[A-Z].[A-Z][a-z]+/)
#           {  printf(substr($i,3));
#              printf(" %s ", substr($i,1,2));
#           };
#        }
#}