Question

I need help with 23-29 please

Answer 1

Using the shortcut for binomial expansion, which still took 45 minutes, I got 23-26.  The coefficient on the x^6 term is 34,020; the coefficient on the x^4 term  is -495; on the x^7 term it's 1800; on the x^3 term it's 337,920.  I'm pooped.  The rest is factorial notation, kinda the same thing, but...