~/dev/MyModule/Makefile.PL
~/dev/MyModule/lib/Local/Math/EM.pm    # Local::Math::EM
~/dev/MyModule/lib/Local/Math/Levy.pm  # Local::Math::Levy
~/dev/MyModule/lib/Local/Math/Log2.pm  # Local::Math::Log2
~/dev/MyModule/bin/script.pl
~/dev/MyModule/t/*.t                   # (optional but recommended)

##</code><code>##

use ExtUtils::MakeMaker;
WriteMakefile(
	NAME      => 'Local::Math',
	VERSION   => '0.01',
	EXE_FILES => [ 'bin/script.pl' ],
);

##</code><code>##

make distclean    # if you've previously run "perl Makefile.PL"
perl Makefile.PL
make manifest
make dist         # will create a Local-Math-0.01.tar.gz for you!