## Precalculus (6th Edition) Blitzer

$45$
Start with given expression: $8^{2}-16\div2^{2}\times4-3$. Start by finding exponents: $64-16\div4\times4-3$. Now perform multiplication and division from left to right: $64-4\times4-3=$ $64-16-3$. Finally, perform addition and subtraction from left to right: $48-3=45$.