### Instruction: Evaluate: $64^2-36^2$.### Response: To solve this problem, I could use the difference of squares formula: $a^2-b^2=(a+b)(a-b)$.
In this case, $a=64$ and $b=36$, so I can rewrite the expression as $(64+36)(64-36)$.
This simplifies to $100\cdot 28$, which is much easier to calculate.