##
$ perl -le'print "3$ARGV[0]4";' +
3+4
$ perl -le'print eval "3$ARGV[0]4"' +
7
$ perl -le'print eval "3$ARGV[0]4"' '*'
12
####
$ perl -le'print $ARGV[0]' '`rm -i *`'
`rm -i *`
$ perl -le'print eval $ARGV[0]' '`rm -i *`'
rm: remove regular file `demo.pl'? ^C