F(1) = 3
F(2) = F(2-1)*F(2-1)-F(2-1)*2+6*2 = F(1)*F(1)-F(1)*2+12 = 3*3-3*2+12=15
G(1)=3
G(2)=G(2-1)*2 = G(1)*2=3*2=6
F(2)+G(2)=15+6=21
F(1) = 3
F(2) = F(2-1)*F(2-1)-F(2-1)*2+6*2 = F(1)*F(1)-F(1)*2+12 = 3*3-3*2+12=15
G(1)=3
G(2)=G(2-1)*2 = G(1)*2=3*2=6
F(2)+G(2)=15+6=21