45•(1238+148)

To calculate \( 45 \cdot (1238 + 148) \), first, we need to solve the expression inside the parentheses:

\[ 1238 + 148 = 1386 \]

Now, we can multiply:

\[ 45 \cdot 1386 \]

Calculating that gives:

\[ 45 \times 1386 = 62270 \]

Thus, the final answer is:

\[ \boxed{62270} \]