deletions | additions       diff --git a/y.tex b/y.tex  index 27201e5..b71d193 100644  --- a/y.tex  +++ b/y.tex 
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Q(k)=\frac{k(k+1)(k+2)...(k+m)}{(m+1)!} \\  Q_n(k)=\frac{1}{n}\prod_i^n(k+i-1) Q_n(k)=\frac{1}{n!}\prod_i^n(k+i-1)  \end{equation}