Hi there!
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I believe your answer is:
[tex]-4d[/tex]
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Here’s why:
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[tex]\boxed{\text{Simplifying the Expression Given...}}\\\\d-3d-2d\\-------------\\\rightarrow 1d-3d-2d\\\\\rightarrow -2d - 2d\\\\\rightarrow \boxed{-4d}[/tex]
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Hope this helps you. I apologize if it’s incorrect.