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Question

−1⋅f(−8)−4⋅g(4)

Answer 1

-f(-8)-4g(4)

=-(f(-8)+4g(4))

that's about all you can do with the problem as given

factor out a negative one

if, for example, f(x)=2x and g(x) =4x

then

-f(-8)-4g(4)

=-(-16)-4(16)

=16-64

=-48

or

-(f(-8)+4g(4))

=-(-16+64)

=-(48)

=-48