test_exp = ->
  run_test [

    "exp(-3/4*i*pi)",
    #"exp(-3/4*i*pi)",
    "-1/2*2^(1/2)-1/2*i*2^(1/2)",

    "simplify(exp(-3/4*i*pi))",
    #"exp(-3/4*i*pi)",
    #"-1/2*2^(1/2)-1/2*i*2^(1/2)",
    "-(1+i)/(2^(1/2))",

  ]