16^ (x+1)+20(4^ (2x))/2^ (x-3)8^ (x+2)
=[2^4]^(x+1)+20[(2^2)^ (2x)]/2^ (x-3)[(2^3)^(x+2)]
=2^(4x+4)+20(2^4x)/2^(x-3)2^(3x+6)
=2^(4x+4)+20*2^(4x-x+3-3x-6)
=2^(4x+4)+20*2^(-3)
=2^(4x+4)+20/8
=2^(4x+4)+5/2