Epsilon: Mixed fraction support

[0b101]

Problem you'd like to fix

There is currently no support for mixed fractions (Wiki).

Screenshots

If I type in and press EXE

This is what is currently displayed:
=

This is what could be displayed if there was support for mixed fractions:
= =

Describe the solution you'd like

Add a mixed fraction output when the resulting fraction is improper. Also add a mixed fraction icon/command in the toolbox. Ex:

Additional context

I don't know if mixed fractions are used outside of the US, but this might help if they aren't:
= = =

and this

goes into once. That leaves remaining because =. The is added onto the remaining . That means = = =

[boricj]

We don't use mixed fractions in France. I would not show the three forms as that could too large with large results and too distracting. Instead, I would add a new setting to control how fractions are simplified (simple or mixed).

[0b101]

That would work,

[INailedIt]

We do use mixed fractions in the UK, however for the majority of mathematicians we prefer to work with improper fractions as they are easier to manipulate. We only tend to use mixed when we're tidying up our work.

[RubenNumworks]

Since version 13 of Epsilon, in the Calculation app, when a fractional output result is selected, an ellipsis button appears and pressing OK or EXE shows _additional results_ among which is the mixed fraction form of the fraction.