\[\left( 2ab^{2} \right)^{4} \bullet \left( 2x^{2}b \right)^{3} =\]
\[= 2^{4} \bullet a^{4} \bullet b^{8} \bullet 2^{3} \bullet a^{6} \bullet b^{3} =\]
\[= 2^{7}a^{10}b^{11} = 128a^{10}b^{11}\]