feat: add factorial and binomial simplification rules#289
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Add simplification rules for factorial quotients (n!/k! via partial products), binomial detection (n!/(k!(n-k)!) → Binomial(n,k)), binomial identities (C(n,0)→1, C(n,1)→n, C(n,n)→1), and factorial sum factoring (n!-(n-1)! → (n-1)!*(n-1)). Works for both concrete integers and symbolic expressions. https://claude.ai/code/session_0114soGikCy942KAFJU8xn79
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Add simplification rules for factorial quotients (n!/k! via partial products),
binomial detection (n!/(k!(n-k)!) → Binomial(n,k)), binomial identities
(C(n,0)→1, C(n,1)→n, C(n,n)→1), and factorial sum factoring
(n!-(n-1)! → (n-1)!*(n-1)). Works for both concrete integers and symbolic
expressions.
https://claude.ai/code/session_0114soGikCy942KAFJU8xn79