Letra B.

[tex]N = 5 {}^{5} \div 5 {}^{2} \div \sqrt{25} - ( \sqrt[3]{25} \: . \: \sqrt[3]{5} ) \\ [/tex]

[tex]N = 5 {}^{5} \div 5 {}^{2} \div 5 - \sqrt[3]{125} \\ [/tex]

[tex]N = 5 {}^{5 - 2 - 1} - \sqrt[3]{125} \\ [/tex]

[tex]N= 5 {}^{2} - 5 \\ [/tex]

[tex]N = 25 - 5 \\ [/tex]

[tex]\boxed{\boxed{\boxed{N = 20}}} \\ [/tex]