I am looking for ways to clear remember tables in a Maple session to ensure that a Maple command/procedure is executed as if it were being called for the first time. I currently use

map(forget, [anames()])

but I am not sure if that statement clears all existing remeber tables (i.e. including system remember tables)?

Are there other ways to do this? Restart is not an option since it clears almost everything.

Edit: This question is not about disabling remember tables.

To enter prime notation in Math-2D I currently do

k^2 + `k'`^2 = 1;
                           2     2    
                          k  + k'  = 1

To enter a back tick (left single quote symbol) this requires with my keyboard shift+(key for `) followed by hitting the space bar.

The output looks nice

However to enter k' in a new input line, dragging and dropping k' (which normally works for other expressions) from a former output does not work. The result is

Instead of changing default typesetting rules, I made k' atomic and dragged it to the favourite palette. This is an acceptable solution to avoid keyboard acrobatics. The only drawback is that the favourite palette gets crowded after a while.

I was wondering whether there are other ways to enter prime notation in a less complicated way as I have described above?

Has anybody seen the unit palette beeing empty? 

This is new to me. I normally use the unit entry in the favourites but this time wanted to try Maple presets.

I am looking for a command that extracts sqrt(2) from

sqrt(4 + (-2*x - 2)*y)

The expression above is a subexpression of a larger expression generated by Maple (an integral).
In this situation manual workarounds are impractical and errorprone.

Ideally Maple should return

sqrt(2)*sqrt(2 - (x + 1)*y)

I tried simplify, factor, collect and so on...

In case that there is nothing (which I doubt):
Why is Maple not having simple commands that do extraction (and absortion/inclusion) of factors?

(extract and absorb are names not used so far that would be easy to remember.)  

Update - example of an expression:

expr := Int(sqrt(-2*alpha^2*x - 2*alpha^2 + 4)/(sqrt(-alpha^2 + 1)*(-alpha^2*x - alpha^2 + 2)), alpha = 0 .. z) = EllipticF(z, sqrt(2*x + 2)/2)

When clicking on a pink error message I get this

Can someone explain what is going on? Quite unusual for me all this.

I do not have a server to white list. What can I do about it?

Is that Sucuri thing safe?