(Complex. 1 1)
#<Complex 1 1j>

(c-add (Complex. 3.17 7) (Complex. 1 1.77))
#<Complex 4.17 8.77j>

(c-mul (Complex. 0 1) (Complex. 0 1))
#<Complex -1 0j>

(c-neg (Complex. 1 2))
#<Complex -1 -2j>

(c-inv (Complex. 1 1))
#<Complex 1/2 -1/2j>

(c-conj (Complex. 1 1))
#<Complex 1 -1j>