If for example

L := [3, 4, 6, 7, 2, 3, 5, 4, 6, 8, 20, 4, 5, 12, 0, 5, 5, 5, 3]:

b := ListTools:-Enumerate(L):
g := plot(CurveFitting:-Spline(b, v), v = 1 .. 19):
gp:=pointplot(b):

display(g,gp)

It is a nice curve but between points at x=12 and x=13 there exists a large dip, and there are a few other smaller...

Why does collect only work sometimes?

I will show with a simple example.  I can do this

a := 5*x^2-4*x+3;
       
                             a := 5 x²  - 4 x + 3
h := exp(x)*a+exp(x);
            ...

Mapleprimes has really painfully slowed down in the last day.  What's happened?

After I post this message mapleprimes will refresh and refresh a few times (not that it hasn't done that before) but now that it's slower again, it's quite frustrating, I can't post even check primes for at least 15 minutes after a post.  Back to the old days of primes 2 I guess.  I can't tell if mapleprimes making progress but it seems like were going backwards just as much as we go forwards.

Is it possible that we can add or modify new expressions in the palettes?

There are many ways to enter the second derivative in Maple.  Except for some silly reason I am stuck trying to figure out or find out how to enter it in 2d math form. 

d²    f
^---
dx²

Entering it like d^2 (right arrow) f  / (dx^2)  is not the right way to enter it.  What is the right way?