Stay Home! Warm Your Love for Geometry!!

You are given a right triangle ABC where angle ABC is the right angle and BD is perpendicular to AD . The values of AB and BC are given in the input. All you need to do is finding out the value of $ {x}^{2} + {yz} - {z}^{2} $ . Can you do the easiest job here? Yes, you can. I have firm faith on you.

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