N:=15;P1:=LN(C)-LN(REF(C,1));M1:=MA(P1,N);S1:=STD(P1,N);BC:=POW(S1,3);T1:=POW(P1-M1,3);ZH:=SUM(T1,N);PK:(1/N)*(1/BC)*ZH,COLORGREEN;0;