How do I combine these two formulas for result in one cell

=IF(OR(E42="s417t401-43",E42="s417t401-44"),DATE(YEAR(G42)+15,MONTH(G42)+0,DAY(G42)+0))
=IF(OR(e42="123411-12",E42=123411-15"),date(year(G42)+10,month(g42)+0,day(g42)+0))