Simplify 10 divide 5+4^2x4-3

To simplify the expression, we follow the order of operations which is Parentheses/Brackets, Exponents, Multiplication/Division (from left to right), and Addition/Subtraction (from left to right).

We start by evaluating the exponents:
4^2 = 16

Now, we can simplify the expression:
10 ÷ 5 + 16 × 4 - 3

Next, we carry out the multiplication and division:
10 ÷ 5 = 2
16 × 4 = 64

Our expression now becomes:
2 + 64 - 3

Finally, we perform the addition and subtraction:
2 + 64 = 66
66 - 3 = 63

Therefore, the simplified expression is 63.