7*7:7+7+7*7

Let's break down the expression step by step:

The expression is:

\( 7 \times 7 : 7 + 7 + 7 \times 7 \)

First, clarify the operators. Here, I interpret ':' as division. Thus, the expression becomes:

\( 7 \times 7 \div 7 + 7 + 7 \times 7 \)

Now, let's calculate it:

1. Calculate \( 7 \times 7 = 49 \)
2. Now the expression is \( 49 \div 7 + 7 + 49 \)
3. Next, calculate \( 49 \div 7 = 7 \)
4. Substitute back into the expression: \( 7 + 7 + 49 \)
5. Now, calculate \( 7 + 7 = 14\)
6. Finally, calculate \( 14 + 49 = 63 \)

So the final result is:

63