Răspuns :
[tex] {4}^{5} + {4}^{5} + {4}^{5} + {4}^{5} = \\ \\ 1 \times {4}^{5} + 1 \times {4}^{5} + 1 \times {4}^{5} + 1 \times {4}^{5} = \\ \\ (1 + 1 + 1 + 1) \times {4}^{5} = \\ \\ 4 \times {4}^{5} = \\ \\ {4}^{1} \times {4}^{5} = \\ \\ {4}^{1 + 5} = \\ \\ {4}^{6} [/tex]