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;