Its response to your first question is in fact exactly right, because you didn't ask what you thought you asked. Your brackets are in the wrong place. You asked:

    e^i(pi)+1

which is:

    (pi * (e^i) ) + 1

which is:

    2.69740975.. + 2.64355906... i

So it was right.

And sqrt(i) is sqrt(sqrt(-1)) which is (-1)^(1/4), so again, it was right (excepting that it put "you" instead of "i")

So it did better than you think.