The following bug came up in the attached problem, which is an updated version of one of Shaun Ault's APEX problems. For one seed (330), the problem asks for the indefinite integral \int x^5 e^(x^6) dx

(There is also a part (b), but that part works OK.)

Context is set to numeric. A student sent us an email because her answer of

(1/6)e^(x^6) was marked incorrect, despite being the right answer.

Oddly enough, if we instead input e^(x^6)/6, the problem is marked correct, and we get the message "This answer is equivalent to the one you just submitted."

So despite WeBWorK recognizing the two answers as being the same, one is marked right, and the other is marked wrong. Anyone have thoughts on what's happening?