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a)
[tex]2 {}^{2017} + {2}^{2016} + {2}^{2015 = } [/tex]
b)
[tex] {2 \times 3}^{2017} + {5 \times 3}^{2016} - {2 \times 3}^{2017} [/tex]
c)
[tex] {5}^{3018} - {20 \times 5}^{2016} - {24 \times 5}^{3015} [/tex]

Dau coroană,va rog!!