Maple can't load the underlying formulas in the cells from excel, only the visualized data.

In the short period of time I have.  You can use textplot with plot to get the curves in your plot.  I think it's possible to get the same linestyle in a legend, maybe not actually use the legend option but use a plot within a plot as the legend.

To get you started on a solution, combine textplot with plot.  Here's an example

with(plots):
point1 := {seq([(1/3)*x, -((1/3)*x-3)^2+4, "Δ"], x = 0 .. 15)}:
a := textplot(point1):
b := plot(-(x-3)^2+4, x = 0 .. 5):
display(a, b)

It may be available onsite at university computer labs for free use for students. But otherwise the full version student version is a discounted price for use at home.

First expand and then simplify will work.

simplify(expand( beta^(1/2)*(1+beta^(1/2))/(beta+beta^(1/2)) )

                                                      1

Alternatively

with(combinat):

randcomb([-1,1],1)

Use display to join plots.  You didn't mention what kind of straight line.  If you set your plot to a, and for example set one of these to b

b:=plot([3,y,y=2..6]) # a vertical line at x=3 from y=2..6

or

b:=plot([x,3,x=6..9]) # a horizontal line at y=3 from x=6..9

then join your plots with display

with(plots):

display(a,b)

To hide equation labels just modify the color of the equation labels under styles to white.

Format -> Styles -> Equation label -> Modify -> color and change color to white.

For example, here is a way

plot(x^2, x = 0 .. 5, tickmarks = [[1 = `#munder(mn("one"),mo("___"))`, 2 = `#munder(mn("two"),mo("___"))`, 3 = `#munder(mn("three"),mo("_____"))`, 4 = `#munder(mn("four"),mo("____"))`], default])

Just a small tangent to your problem ... , if say you did re-organize the books to equalize the number of pages each person scanned, you could utilize the BinPacking1d proc by Carl Love created a while back.

BinPacking1d.mw

BinPacking1d(equalized # of pages to read per person, in this case 4500/3,[books available[pages,books]])

BinPacking1d(1500,[[100,1],[200,1],[300,1],[400,1],[500,1],[600,1],[700,1],[800,1],[900,1]])

Your output is 2DOutput so go through the Format menu at styles and choose 2DOutput and Modify.

I recommend getting rid of Debian, not Maple but seriously, it's more of a debian font issue than a problem with maple.

@mapleatha 

Maybe something like

S1 := map(allvalues,sol);
remove(has, S1, I)

example of remove

a:=[1,2,3,6,7,8,9,12,24,45,56,23]

remove(`>`,a,10)
                               [1,2,3,6,7,8,9]

Maybe just use op?

op(f)[2]*``op(f)[1]

simplify(``sort(expand(f), s, ascending))

**edit added**  seems we can do away with the ,s,ascending part of the code and just write

simplify(``sort(expand(f)))