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Thank you for your upvote and nice reply.
Would you like to try and answer the puzzle?

As you asked...
ux.i = uy unit vector in y direction.

Thank you for your answer.
That was fun wasn't it?
Would you like to try and show your algebra for the 3 SBD prize?

Check out who the winners are. You are first to post the correct answer.
https://steemit.com/math/@point/winners-and-answer-to-the-win-sbd-in-this-math-contest-1-simplify

Congratulations!

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