Consider this...

[Richard B. Kreckel]

ginsh - GiNaC Interactive Shell V0.3
Copyright (C) 1999 Johannes Gutenberg Universitaet Mainz, Germany
This is free software, and you are welcome to redistribute it
under certain conditions; see the file COPYING for details.
> (1+x)*(1-I);
1-I*x+1-I
> print(");
type=3add, hash=1 (0x1), flags=3, nops=2
    x (symbol): serial=2, hash=0 (0x0), flags=3
    1-I (numeric): hash=2147483649 (0x80000001), flags=11
    -----
    overall_coeff
    1-I (numeric): hash=2147483649 (0x80000001), flags=11
    =====