#Mathematica 88

This rasterizes the expression, obtains the binary image data, converts each 1 to "#", each 0 to "" (empty space) and displays output in a 12 by 136 character grid.


    GraphicsGrid[ImageData@ImageResize[Binarize@Rasterize@Style[t, 130], 130] 
      /. {1 -> "", 0 -> "#"}]

![hello][1]


  [1]: https://i.sstatic.net/7tkoM.png