$y = 2+$x;    # + = addition operator
$y = +$x;     # + = disambiguation operator

$y = 2-$x;    # - = subtraction operator
$y = -$x;     # - = arithmetic negation operator

$y = 1*FOO;   # * = multiplication operator
$y = *FOO;    # * = Glob sigil

$y = 1/...    # / = division operator
$y = /...     # / = match operator