How can I make the output print like the input, with the short denominator written as a factor in front of the long expression?

enter image description here

I was messing with styles earlier today to do something else, and at one point it started printing like that, so I know it can be done, but then it reverted back.

  • $\begingroup$ Defer[1/f] g. $\endgroup$
    – Coolwater
    Commented Apr 25, 2016 at 6:24
  • $\begingroup$ @Coolwater Could you elaborate more on your comment, please? $\endgroup$
    – SU3
    Commented Apr 25, 2016 at 6:26
  • $\begingroup$ For your convenience, you could add your original code. In that way you will help community help you. It's easier copying code instead of writing down from scratch. $\endgroup$
    – Fierce82
    Commented Apr 25, 2016 at 8:18
  • $\begingroup$ Related: mathematica.stackexchange.com/questions/21502/… $\endgroup$
    – Michael E2
    Commented Apr 25, 2016 at 11:07
  • $\begingroup$ @MichaelE2 Only checked this Q out today - your deleted answer looks very useful! It could be added to $POST to automate it. And maybe a condition on the ratio of LeafCounts could be added. $\endgroup$
    – Jens
    Commented Apr 28, 2016 at 16:15

1 Answer 1


Not sure if all you want is formatted output. With Interpretation you get output you can copy.

fracform[e_] /; Denominator[e] =!= 1 := 
   DisplayForm@ RowBox[{ToBoxes[1/Denominator[e]], " ", ToBoxes[Numerator[e]]}], 
fracform[e_] := e;


Mathematica graphics

  • $\begingroup$ All I want is formatted output, so that when I print my Mathematica sheet to pdf and include it in my latex document it looks more readable. $\endgroup$
    – SU3
    Commented Apr 25, 2016 at 16:56
  • $\begingroup$ So it works, then? (One could also replace Interpretation[..] by its first argument.) $\endgroup$
    – Michael E2
    Commented Apr 25, 2016 at 17:09

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