2(a*2a2)=?

Answer 1

If it is 2*1(2*(2a*2) then since the bases are the same we can add the exponets
1+2a*2
which does not simplify anymore.
Note... this is only correct if it was actually 2a*2

Answer 2

Maybe you meant
2(a*2a^2) = 2(2a^3) = 4a^3