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Homework Statement
1) Find the coefficient of [tex]w^2x^5y^7z^9[/tex] in [tex](w+x+y+z)^{23}[/tex]
2) When [tex](w+x+y+z)^{23}[/tex] is expanded and terms collected, how many different terms will there be?
The Attempt at a Solution
Again, I'm studying through my textbook and I'm finding these kinds of questions in past exams that aren't present in the book. I'm unsure how to begin.