HP50: how to transform '-(2.2*X^2-3.3*X-4.4+5*X^2)' w/ no ()

[Gil]

Sorry to turn back to what seemed a solved question.

As I mentioned, the expression of the type
'-(...)' is unknown, it might appear in a program with -() or already been simplified.

With real coefficients for X,
we saw that -114 SF EVAL could remove the -().

How to remove on the HP49-HP50 the parentheses in
'-(100-1*X+7*X^2)'
or in '-(100.2-X+7*X^2)'
... without string manipulation?

It seems that all the suggested ideas have no effect.