??? f(x,y,z) dxdydz ? ??? f(x,y,z) dydxdz <----- Is there a possible change of integration where this is true for 3 variables, and if so can this generalize to any number of variables will always have at least one change of integration that is NOT equal? Also, can we find a way to identify the maximum number of ways of changing integration that will results in the function of x variables NOT equaling itself?