Solution
Simplify
[tex]2a\times a\times3a+b\times4[/tex]Step 1 : Solve the expression
[tex]\begin{gathered} 2a\times a\times3a+b\times4b \\ 6a^3+4b^2 \end{gathered}[/tex]Step 2: Simplify
[tex]\begin{gathered} 6a^3+4b^2 \\ 2(3a^3+2b^2) \end{gathered}[/tex]Therefore the final answer is
[tex]2(3a^3+2b^2)[/tex]