@FDS Even if one uses 2d-input, at the execution group command line, set the input as "text." (See the box at the top of the window.) Then paste.  It works. 

(I too prefer 2d math input.) 

Hopping on to what @Carl Love contributed and assuming I understand what is going on here, I prefer not to extend the arrow over the subscript.  Refer to the blue version of the vector label.

T := Typesetting;
plots:-display(
  plots:-textplot([1, 2, T:-mover(T:-msub(T:-mi("abc"), T:-mn("def")), T:-mo("→")),  color = red], 
                          font = [arial, bold, 16]), 
  plots:-textplot([2, 2, T:-msub(T:-mover(T:-mi("abc"), T:-mo("→")), T:-mn("def")), color = blue], 
                          font = [arial, bold, 16]), 
  axes = none);

@WD0HHU I don't see an uploaded version. If you reply to this post with the .mw file, I'll look at it. But it sounds like your best bet is to increase your zoom factor while making the graph smaller. 

@WD0HHU Hmm, I'm not entirely sure what symbol fonts you want to enlarge. So, let me make two suggestions instead.

1) Make the graphs smaller. 

Just after the restart command, add the line:

  plots:-setoptions( size = [350, 350] )

(I have added this line to the initialization file so that all my graphs are smaller.)

2) Set the Zoom Factor to 125% or 150%. 

Now re-execute the worksheet, and you will see the fonts are larger compared to the graph size. 

I also recommend looking at other examples of Explore. In HELP, look for 'examples, Explore'. 

@C_R I agree the two solutions work. And we agree p__1 is not the same as p__2. Hence, is(p__1 = p__2) should return a false, which it does in some versions. 

@Kitonum 

Download Exponential_rule.mw

@Carl Love Yes,  solve did not choke. Given how I had written the solve expression,  I misread the eval error statement. (It is humongous, as one can expect.)  Specifically, I copied the OP line  solve({equations}, [seq of variables]) rather than solve({equations}, {variables})  eval(s, T[1]) produced a result.  

Unless I mistyped the problem, even though I declared gamma to be local, the output is too complicated that Maple does not execute. Solving the set of non-linear equations without an output

  T:= solve({f1, f2, f3, f4, f5, f6}, [s, v, e, i, q, r]):

for the unknowns and asking for the expression of s

eval(s, T)

produced and "invalid input." Hence, no solution was returned.

Please, next time use the big green arrow to upload your worksheet.

@sursumCorda In Maple, variables are altered based on when a command is executed. In Flow, variables are altered based on where the command exists in the worksheet. 

Based on my experience teaching new users for a dozen years or so, getting these folks to recognize that if they correct a line in the middle of the calculations, it does not mean the line at the end of the calculation is immediately corrected. The new users will say to me, "My worksheet does not work even though it looks like it should work because the commands are laid out in the correct sequence." I often "fix" their error by going back to the restart command and hitting <Enter><Enter><Enter> several times. (I recommend worksheet mode over document mode for new users.)

In Flow, it is what you see is what you get. If you correct a previous line, all subsequent lines are updated and corrected. This is why when if first attempted to introduce computation into my physics courses, I started with Mathcad. However, I found Maple to be a more robust CAS, so I switched to it.

@dharr A worthy attempt.  But it fails. 

As one Maplesoft employee once characterized Maple Flow, Flow is a form of Maple lite. What works in Maple does not necessarily work in Maple Flow. 

And yet, Maple Flow has one feature that is incredibly powerful, especially for new users. Calculations are performed through input that is applied spatially, not temporally. 

@acer Agreed on the third parameter. 0..0.99999999

While both solutions below work with Maple, neither one works with Maple Flow 2022.  It appears the "||" operator is not recognized. It may work with version 2023. (You do not say which version.)

@acer The first error is bizarre. 

And saying "plot(expr,x) works Ok" is completely unexpected. "expr" has to be assigned somewhere else, yes?

@acer Yes, I know MakeFunction is an alias name for unapply. Since the 2019 Maple Conference, I have been publically pushing for another name or another function to replace the "what the heck does that mean" unapply procedure. 

So, a big thumbs up to Maplesoft for adding the MakeFunction name. (I just wish the addition had been included in the "What's New" notes. I lucked out in finding out about it from a Maplesoft employee.)  And because I am so pleased about the MakeFunction procedure name, I want to ensure folks know about it. 

Unfortunately, for this post, my attempt at hyperbole-based humor was misunderstood. Maybe I should have changed the font. 

@acer What if I want to display multiple variables, each in a separate line using technique 3?  For example:

y1 = x + 1
y2 = x + 2

Currently, they come out as :

  y1 = x + 1, y2 = x + 2