User blog comment:Swooped me in one hit/my first attempt at creating notation./@comment-29310326-20170215152342/@comment-45.26.79.90-20170216010631

Hint define -- to be equal to for x--y which results in an array of y x's

Example 1 4--8= 4-4-4-4-4-4-4-4

Example 2 x---y equals an array of y x's with - replaced by -- 3---7 equals 3--3--3--3--3--3--3