z1 <- 1.5 + 3i
z2 <- 1.5 + 1.5i
print(z1 + z2)   #  3+4.5i
print(z1 - z2)   #  0+1.5i
print(z1 * z2)   #  -2.25+6.75i
print(z1 / z2)   #  1.5+0.5i
print(-z1)       #  -1.5-3i
print(Conj(z1))  #  1.5-3i
print(abs(z1))   #  3.354102
print(z1^z2)     #  -1.102483-0.383064i
print(exp(z1))   #  -4.436839+0.632456i
print(Re(z1))    #  1.5
print(Im(z1))    #  3