Math help plugging in numbers

Given that f(x) = -3x^2 + 6 and g(x) = 4x – 8,?
find : f(-2) – g(4).

g(4) – f(-2)

f(-2) + f(3)

g(3) + g(-4)

Given that f(x) = -3x^2 + 6 and g(x) = 4x – 8,?
find : f(-2) – g(4)=-3(-2)^2 - (16-8)=-12-8=-20
g(4) – f(-2)
=(16-8)-(-12)=8+12=20

f(-2) + f(3)
=-3(4)+12-8
=-8

g(3) + g(-4)
=4(3)-8+(-16-8)
=12-8-24
=-20