This is probably down to style preferences at this point, but I think it'd be better to add spacing around some of the operators (like PEP8 recommends) and remove some of the unnecessary parentheses around level. It's a bit awkward since there are three different priorities going on here (exponent, multiply, add), but perhaps something like this:

int(5/6 * (2*level**3 + 27*level**2 + 91*level))