Question: How to combine these two terms into one?

Why Maple can not do this basic combining of two terms? What do  I need to do to help Maple do it? Am I not using the correct command?

restart;

interface(version);

`Standard Worksheet Interface, Maple 2024.1, Windows 10, June 25 2024 Build ID 1835466`

Physics:-Version();

`The "Physics Updates" version in the MapleCloud is 1795 and is the same as the version installed in this computer, created 2024, August 28, 23:14 hours Pacific Time.`

e:=B^2/(4*(k^n)^(2/3)) - (k^n)^(1/3)*x;

(1/4)*B^2/(k^n)^(2/3)-(k^n)^(1/3)*x

combine(e);

(1/4)*B^2/(k^n)^(2/3)-(k^n)^(1/3)*x

combine(e,symbolic)

(1/4)*B^2*k^(-(2/3)*n)-k^((1/3)*n)*x

combine(e,power)

(1/4)*B^2/(k^n)^(2/3)-(k^n)^(1/3)*x

combine(e,radical)

(1/4)*B^2/(k^n)^(2/3)-(k^n)^(1/3)*x

combine(e,radical,symbolic)

(1/4)*B^2/(k^n)^(2/3)-(k^n)^(1/3)*x

combine(e) assuming positive;

(1/4)*B^2*k^(-(2/3)*n)-k^((1/3)*n)*x

combine(e,abs)

(1/4)*B^2/(k^n)^(2/3)-(k^n)^(1/3)*x

 

 

Download how_to_combine_august_28_2024.mw

For reference, using another software, this is what it gives

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