Answer:
86
Explanation:
According to the PEMDAS order of operations, multiplication and division are performed before addition and subtraction. Therefore, we can simplify the expression as follows:
```
10 x (5 +3 +7) - (6 +2)^2 =
10 x 15 - (8)^2 =
150 - 64 =
86
```
Therefore, the answer is **86**.