The distributions of linear forms ofmindependent exponentially distributed random variablesT1,T2, · · ·,Tmor linear forms of the variablesT(1),T(2), · · ·,T(m) (where T(i) isith order statistic) are considered. The results are used for the determination of the distributions of products of powers of the variablesZ1,Z2, · · ·,Zm(or of order statisticsZ(1),Z(2), · · ·,Z(m)) which have the power-function distributions.