Compute: $(17+10)^2-(17-10)^2$.
This problem looks like it involves the difference of squares formula: $(a+b)^2-(a-b)^2=4ab$. I can apply this formula by letting $a=17$ and $b=10$. Then I get $(17+10)^2-(17-10)^2=4(17)(10)$. This simplifies to $4(170)$, which is $680$. 