Answer:
714
Explanation:
To solve this you have to use the BODMAS theory.
That means,
B ⇒ Brackets
O ⇒ Of
D ⇒ Divide
M ⇒ Multiplication
A ⇒ Addition
S ⇒ Subtraction
You have to solve the sum according to the above.
2 + 3 + 5 + 10 x 64 + 7 + 57
2 + 3 + 5 + 640 + 7 + 57
5 + 645 + 64
650 + 64
714
Let me know if you have any other questions. :-)