Unexpected result in equation elimination from Wolfram Alpha

Questions
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1

what I want to do…

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IMG_0544.jpeg5712×3213 2.16 MB

(Issue is: The wolfram result doesn’t look like equation 3-18a.)

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Image3-30-25at2.20 PM.jpeg1648×852 124 KB

2

Your parentheses do not match. In Mathematica I get the expected result.

3

Thanks very much!
I get something equivalent now too.