[tex] {4}^{5} \times {5}^{4} \div {10}^{4} \times {2}^{5} = ( {2}^{2} {)}^{5} \times {5}^{4} \div (2 \times 5 {)}^{4} \times {2}^{5} = \underline{ {2}^{10} }\times \underline{ \underline{{5}^{4} }}\div \underline{ {2}^{4} } \times \underline{\underline{{5}^{4}}} \times \underline{{2}^{5} }= {2}^{11} \times {5}^{8} [/tex]
