2.下列函数何处可导?何处解析?-|||-(1) (z)=(x)^2-iy ;-|||-(2) (z)=2(x)^3+3(y)^3i;-|||-(3) (z)=x(y)^2+i(x)^2y-|||-;(4) (z)=sin xchy+icos xshy.