What is the value of this expression when r=2,s=1,and t =0?Explain your answer

Maybe it's just my end, but I don't see the expression.

What is the value of this expression when r=2,s=1,and t =0?Explain your answer

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Maybe it's just my end, but I don't see the expression.

## Comments

That's what it said..that's the funny thing..

Thank you very much.