A1. What is the value of the expression $2^{0^{2^{3}}}+0^{2^{3^{2}}}+2^{3^{2^{0}}}+3^{2^{0^{2}}}$?
(A) 3
(B) 4
(C) 7
(D) 12
(E) Greater than 100.
A1. Considering that $0^{m}=0$ and $n^{0}=1$ for any natural numbers $m$ and $n$, we get

$$
2^{0^{2^{3}}}+0^{2^{3^{2}}}+2^{3^{2^{0}}}+3^{2^{0^{2}}}=2^{0}+0+2^{3^{2^{0}}}+3^{2^{0}}=1+0+2^{3}+3=1+0+8+3=12
$$