:=A((V > REF(V,1) AND C <= REF(C,1) * 0.998) OR (V > MA(V,50) AND C <= REF(C,1 )* 1.002 AND C > REF(C,1 ))) - ((REF(V,1)> REF(V,2) AND REF(C,1) <= REF(C,2)*0.998) OR ((REF(V,1) > MA(V,50.1) AND REF(C,1) <= REF(C,2) * 1.002 AND REF(C,1) > REF(C,2))) - ((REF(V,2)> (REF(V,3) AND REF(C,2)<= REF(C,3) * 0.998) OR ((REF(V,2)> MA(V,50.2) AND REF(C,2)<= REF(C,3) * 1.002 AND REF(C,2)> REF(C,3))) - ((REF(V,3) > REF(V,4) AND REF(C,3)<=REF(C,4)*0.998) OR (REF(V,3) >MA(V,50.3) AND REF(C,3