[tex] { ({4}^{0} + {4}^{1} + {4}^{2}) }^{5} \div {21}^{3} - {21}^{2} [/tex]
[tex] = {(1 + 4 + 16)}^{5} \div {21}^{3} - {21}^{2} [/tex]
[tex] = {21}^{5} \div {21}^{3} - {21}^{2} [/tex]
[tex] = {21}^{5 - 3} - {21}^{2} [/tex]
[tex] = {21}^{2} - {21}^{2} [/tex]
[tex] = 0[/tex]