helloworld-unwhitespaced.rb

one = 1
two = one+one
five = two*two+one
ten = five*two
hw = [ten*(five+two)+two, 
    hundred1 = ten*ten+one, 
    l = ten*ten+ten-two, 
    l, 
    hundred11 = hundred1+ten,
    ten*two+ten+two, 
    ten*ten-two*ten+five+two, 
    hundred11, 
    hundred11+one+two, 
    l, 
    ten*ten, ten+one+two, 
    ten]
puts hw.map(&:chr).join