Simplify: a(a2+a+1)a(a^2 + a + 1)a(a2+a+1).
a3+a2+aa^3 + a^2 + aa3+a2+a
a3+1a^3 + 1a3+1
3a33a^33a3
a2+a+1a^2 + a + 1a2+a+1