Enable text based alternatives for graph display and drawing entry

Try another version of this question

Subtract `(``-7x^5 -3x^2 -6``)` from `(``-1x^5 -9x^2 + 7x``)`
 

X
MathQuill
   x  x    n  |   | (   ) π DNE
   x    (   ) π DNE
( ) ( ] [ ) [ ] —∞ DNE
< > or All Real Numbers DNE
log logn ln n  | | e 
sin cos tan arcsin arccos arctan  
[more..]