y = 2^(3·x + 3) + 4^(2·x + 2) + 8^(x + 1)
y = 2^(3·x + 3) + (2^2)^(2·x + 2) + (2^3)^(x + 1)
y = 2^(3·x + 3) + 2^(4·x + 4) + 2^(3·x + 3)
y = 2·2^(3·x + 3) + 2^(4·x + 4)
y = 2^(3·x + 4) + 2^(4·x + 4)
y = 2^(3·x + 4) + 2^x·2^(3·x + 4)
y = 2^(3·x + 4)·(1 + 2^x)