а-13*(а8)2

Let's simplify the expression \( a - 13 \cdot (a^8)^2 \).

First, we can simplify \( (a^8)^2 \):

\[ (a^8)^2 = a^{8 \cdot 2} = a^{16} \]

Now we substitute this back into the expression:

\[ a - 13 \cdot a^{16} \]

So, the simplified expression is:

\[ a - 13a^{16} \]