While testing my solution, I found it passes all test cases while having sin(x) hard-coded to 0. None of the test cases for exponential result in a complex number with a non-zero imaginary part.
This issue was fixed in the problem-specifications repository by #2052, but the wasm version of the exercise hasn’t been synced.
This issue affects the wasm track more than most because it requires you to implement sin, cos, and exp yourself.