$calc2(1 / (1 - 2 * 2 + 2 * 2)) = $null
$calc(1 / (1 - 2 * 2 + 2 * 2)) = 1

I appreciate the attempt, though, hixxy. It is much more productive than simply criticizing one's reasons for claiming the bug. I think, ideally, that checking for 0 divisors should be done alongside the calculation, since only at that point will there be an explicit value for the divisor. This could be reserved for a new, native calculate identifier, as well, so as to not destroy any backward compatibility with older scripts.