2※【（3△4）△（2※1）】=2※【（3+4-1）△（2^1-1）】=2※【6△1】=2※【6+1-1】=2※6=2^6-1=63
3△4=3+4-1=6， 2※1=2^1-1=1，（3△4）△（2※1）=6△1=6+1-1=6.则2※【（3△4）△（2※1）】= 2※6 =2^6-1=64-1=63.
