The only challenge of this task is the exponential function, because it requires an exponential, a sine and cosine function; if we want to get anywhere near the values that would be expected, we need to use something like the Taylor Series to a precision of ~1/26!.
I’m not sure about the difficulty, but with a description of how the Taylor Series works, it should be fairly doable.
PR: new exercise: complex-numbers by atk · Pull Request #149 · exercism/wasm · GitHub