Answer
$12^4-8^4=16,640$
Work Step by Step
To evaluate $12^{4}-8^{4}$ using a calculator, press the following keys in the specified order:
Press $\boxed{12}, \quad \boxed{y^x} \text{ or } \boxed{\text{^}}, \quad \boxed{4}, \quad \boxed{-}, \quad \boxed{8}, \quad \boxed{y^x} \text{ or } \boxed{\text{^}}, \quad \boxed{4}, \quad \boxed{=} \text{ or } \boxed{\text{ENTER}}$ to obtain:
$$12^4-8^4=16,640$$
