A6. The value of the expression $\frac{7^{2 n+3} \cdot 7^{3 n+2}}{49 \cdot 7^{5 n}}$ is equal to:
(A) $\frac{1}{343}$
(B) $\frac{1}{7}$
(C) 49
(D) 343
(E) 2401

## II. PART
A6. We simplify the expression: $\frac{7^{2 n+3+3 n+2}}{7^{2+5 n}}=\frac{7^{5 n+5}}{7^{5 n+2}}=7^{3}=343$.

## II. PART