(value of annuities and value of life insurance policies included in decedent's taxable estate; decedent retained incidents of ownership; estate properly included policies in estate at death (except for overvaluing one) but then later excluded them from estate; however, evidence showed that decedent retained right to change beneficiaries on policies until time of death which causes inclusion in gross estate under I.R.C. Sec. 2042; value of annuities included in estate by virtue of I.R.C. Sec. 2039(a)).