(a)

f(g(-2)) 3-(2)^2= 3-4=-1 plug into 1st equation f(-1)=4(-1)-7=28

b. g(f(-2)) 4(-2)-7=-9 plug into the 2nd equation g(-9)=3-(-9)^2=3-81=78

I hope that this is helpful. Please best my answer, if it was helpful. Thanks!

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