Question 870243
That is unfortunately badly and imprecisely stated.  The description as given is therefore probably wrong.


Here is one attempt to symbolize that worded description:
The unknown number may be called, n.
n+4;
(n+4)^2;
3(n+4)^2;
-3(n+4)^2;
5-3(n+4)^2.


{{{highlight_green(5-3(n+4)^2)}}}